Artykuły w czasopismach: „Gas solid interaction”

1

Dolmatov, A. I., i S. A. Polyviany. "Interaction of Solid Particles from a Gas Stream with the Surface of a Flat Nozzle". METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 43, nr 3 (1.06.2021): 319–28. http://dx.doi.org/10.15407/mfint.43.03.0319.

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Sychov, Maxim М., Sergey V. Mjakin, Alexander I. Ponyaev i Victor V. Belyaev. "Acid-Base (Donor-Acceptor) Properties of Solids and Relations with Functional Properties". Advanced Materials Research 1117 (lipiec 2015): 147–51. http://dx.doi.org/10.4028/www.scientific.net/amr.1117.147.

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Distribution of active surface centers (DAC) spectroscopy is applied to study acid-base properties of solids. Surface characteristics of solid influences interface interaction in which this solid participates. Efficient approach to consider such interactions is to view them as acid-base ones, since acid-base interactions determine adsorption and bonding of organic molecules to solid surface. Paper describes application of method to study surface properties of components of luminescent materials, catalysts, gas sensors, proton membranes and polymer composites, and it was shown that their functional properties strongly depend on distribution of acid-base active surface centers.

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Li, Zhengquan, Kaiwei Chu, Renhu Pan, Aibing Yu i Jiaqi Yang. "Computational Study of Gas-Solid Flow in a Horizontal Stepped Pipeline". Mathematical Problems in Engineering 2019 (15.09.2019): 1–15. http://dx.doi.org/10.1155/2019/2545347.

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In this paper, the mechanism governing the particle-fluid flow characters in the stepped pipeline is studied by the combined discrete element method (DEM) and computational fluid dynamics (CFD) model (CFD-DEM) and the two fluid model (TFM). The mechanisms governing the gas-solid flow in the horizontal stepped pipeline are investigated in terms of solid and gas velocity distributions, pressure drop, process performance, the gas-solid interaction forces, solid-solid interaction forces, and the solid-wall interaction forces. The two models successfully capture the key flow features in the stepped pipeline, such as the decrease of gas velocity, solid velocity, and pressure drop, during and after the passage of gas-solid flow through the stepped section. What is more important, the reason of the appearance of large size solid dune and pressure surge phenomena suffered in the stepped pipeline is investigated macroscopically and microscopically. The section in which the blockage problem most likely occurs in the stepped pipeline is confirmed. The pipe wall wearing problem, which is one of the most common and critical problems in pneumatic conveying system, is analysed and investigated in terms of interaction forces. It is shown that the most serious pipe wall wearing problem happened in the section which is just behind the stepped part.

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4

Sharma, Renu, Karl Weiss, Michael McKelvy i William Glaunsinger. "Gas reaction chamber for gas-solid interaction studies by high-resolution TEM". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 494–95. http://dx.doi.org/10.1017/s0424820100170207.

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An environmental cell (E-cell) is a gas reaction chamber mounted inside an electron microscope column where thin solid samples can be observed under various gases (O2, H2, N2, NH3 etc.) at selected temperatures. Even though the idea of having an E-cell incorporated in the microscope column is as old as transmission electron microscopy itself, recent developments in the instrumentation and designs of both the microscopes and E-cells have made it possible to obtain high resolution images (0.3-0.6 nm). We have used the differentially pumped model proposed by Swan to modify a PHILLIPS 400T transmission electron microscope for gas-solid studies.Figure la shows a side view cross section schematic of the E-cell fitted in the 9 mm gap between twin lens objective pole pieces. It consists of a small chamber with 200 and 400 μm apertures on sides a and a’ respectively. The walls are machined at the same angle as the pole pieces for an optimum fit to the conical exterior of the pole pieces and the cell is held firmly in place with o-rings (b).

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5

Liu, Xiao Li, Wen Jing Si i Chun Ying Zhu. "Research on the Gas Migration Regularity of Municipal Solid Waste Landfill in the Solid-Liquid-Gas-Heat Interaction". Advanced Materials Research 243-249 (maj 2011): 2216–19. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2216.

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With the establishment of large municipal solid waste landfills, the interaction of geological environment in landfill (seepage field, stress field and temperature field, etc.) has not to be ignored. The multi-field coupling problem of the municipal solid waste landfill is getting attention. But at present the study mainly concentrated on the solid-liquid-gas-heat coupling problem, the study of the waste gas of the municipal solid waste landfill is less. Gas diffusions, gas emissions, and gas collection are related to the secondary pollution problems of the municipal solid waste landfill. This paper established mathematical model which based on the solid-liquid-gas-heat interaction and researched the gas migration rule of the municipal solid waste landfills. The mainly work are as follows: (1) the definite conditions of dynamic model, (2) the solution of dynamic model, (3) results and analysis. The main conclusions are as follows: (1) Pore pressure along the gas flow direction is nonlinear distribution and shows decline trend. As time increases, the pore pressure of each horizontal section decreases. (2)The volumetric strain of the municipal solid waste landfill is nonlinear distribution along the gas flow direction and shows an increasing tendency. As time increases, volumetric strain of each horizontal section increases.(3)As the change of time, the pore pressure first increases, then decreases.(4) In the initial stage, as the change of time, gas output increases rapidly. When it achieves the maximum size, the production quantity of gas reduces and gradually tends to be a quantitative value.

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6

Giampaolo, Ciriaco, i Socio A. Mottana. "A new experimental technique for gas-solid interaction studies." Rendiconti Lincei 1, nr 2 (czerwiec 1990): 165–69. http://dx.doi.org/10.1007/bf03001891.

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Hrach, Rudolf, Jiří Šimek i Věra Hrachová. "Study of plasma—solid interaction in electronegative gas mixtures". Czechoslovak Journal of Physics 56, nr 12 (grudzień 2006): 1437–44. http://dx.doi.org/10.1007/s10582-006-0456-0.

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Doss, E. D., i M. G. Srinivasan. "Modeling of Wall Friction for Multispecies Solid-Gas Flows". Journal of Fluids Engineering 108, nr 4 (1.12.1986): 486–88. http://dx.doi.org/10.1115/1.3242608.

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The empirical expressions for the equivalent friction factor to simulate the effect of particle-wall interaction with a single solid species have been extended to model the wall shear stress for multispecies solid-gas flows. Expressions representing the equivalent shear stress for solid-gas flows obtained from these wall friction models are included in the one-dimensional two-phase flow model and it can be used to study the effect of particle-wall interaction on the flow characteristics.

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9

Mironov, D. V., V. M. Mironov, V. F. Mazanko, D. S. Gertsriken i P. V. Peretyatku. "Interaction of metals and alloys with gas media under spark discharges". Resource-Efficient Technologies, nr 3 (28.08.2018): 19–36. http://dx.doi.org/10.18799/24056537/2018/3/199.

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The paper studies the penetration of nitrogen, oxygen, hydrogen, carbon, argon and krypton into copper, nickel, molybdenum, titanium, aluminum, iron and different steels under the action of spark discharges in various media based on radioactive indicators using step-by-step radiometric analysis, macro-, micro-, electron-microscopy and activation autoradiography, Mössbauer and Auger spectroscopy, secondary ion-ionic emission, X-ray diffraction and X-ray microanalysis. The study describes distribution features of penetrating atoms and their concentration profiles. Phase composition of near-surface layers is also determined. It is shown that supersaturated solid solutions of iron in copper and copper in iron are formed during simultaneous iron and oxygen penetration in copper and spinel (Fe6Cu3O4)4. Diffusion of iron and carbon results in supersaturated solid solutions of iron and carbon in copper, copper and carbon in iron, graphite and cementite. Inert gases and nitrogen form solid solutions with copper. Phase composition of near-surface layers in Fe is determined. Iron dioxide FeO, a carbon solid solution in iron with fcc lattice γ-Fe, tetragonal martensite and cementite, two iron (III) hydroxide FeOOH modifications, a supersaturated solid solution of nitrogen and nitride Fe4N, solid solutions of inert gases in iron are formed in the diffusion zone. Simultaneous interaction of molybdenum with iron (the anode material) and various gases results in the formation of substitutional solid solutions of iron in molybdenum and molybdenum in iron, a small amount of interstitial solid solutions of nitrogen and carbon in molybdenum and nitrogen in iron, interstitial phases: molybdenum nitrides and carbides and traces of nitrides of iron (Fe4N, Fe2N) and Fe1,9Mo (λ) phases in the form of needles. Treatment of nickel with a nickel anode in the nitrogen medium promotes formation of a solid solution of nitrogen and nitride Ni3N in the matrix with preserved hexagonal symmetry and lattice parameters that are characteristic of this phase under equilibrium conditions. Atoms of oxygen, nitrogen, carbon and argon are present in the interstitial solid solutions in treatment of nickel in ambient air; however, oxides are not found even on the surface (in the layer ~200 nm). Interaction of titanium with atmospheric gases leads to formation of a solid solution of nitrogen, oxygen, carbon, hydrogen and argon in titanium and titanium nitride Ti2N (ε). Simultaneous saturation of the titanium surface with nickel and nitrogen in the interaction zone causes formation of phases in the following order: nickel nitride; a solid solution of nitrogen and titanium in nickel and a solid solution of both alloying elements in titanium.

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Mironov, D. V., V. M. Mironov, V. F. Mazanko, D. S. Gertsriken i P. V. Peretyatku. "Interaction of metals and alloys with gas media under spark discharges". Resource-Efficient Technologies, nr 3 (28.08.2018): 19–36. http://dx.doi.org/10.18799/24056529/2018/3/199.

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The paper studies the penetration of nitrogen, oxygen, hydrogen, carbon, argon and krypton into copper, nickel, molybdenum, titanium, aluminum, iron and different steels under the action of spark discharges in various media based on radioactive indicators using step-by-step radiometric analysis, macro-, micro-, electron-microscopy and activation autoradiography, Mössbauer and Auger spectroscopy, secondary ion-ionic emission, X-ray diffraction and X-ray microanalysis. The study describes distribution features of penetrating atoms and their concentration profiles. Phase composition of near-surface layers is also determined. It is shown that supersaturated solid solutions of iron in copper and copper in iron are formed during simultaneous iron and oxygen penetration in copper and spinel (Fe6Cu3O4)4. Diffusion of iron and carbon results in supersaturated solid solutions of iron and carbon in copper, copper and carbon in iron, graphite and cementite. Inert gases and nitrogen form solid solutions with copper. Phase composition of near-surface layers in Fe is determined. Iron dioxide FeO, a carbon solid solution in iron with fcc lattice γ-Fe, tetragonal martensite and cementite, two iron (III) hydroxide FeOOH modifications, a supersaturated solid solution of nitrogen and nitride Fe4N, solid solutions of inert gases in iron are formed in the diffusion zone. Simultaneous interaction of molybdenum with iron (the anode material) and various gases results in the formation of substitutional solid solutions of iron in molybdenum and molybdenum in iron, a small amount of interstitial solid solutions of nitrogen and carbon in molybdenum and nitrogen in iron, interstitial phases: molybdenum nitrides and carbides and traces of nitrides of iron (Fe4N, Fe2N) and Fe1,9Mo (λ) phases in the form of needles. Treatment of nickel with a nickel anode in the nitrogen medium promotes formation of a solid solution of nitrogen and nitride Ni3N in the matrix with preserved hexagonal symmetry and lattice parameters that are characteristic of this phase under equilibrium conditions. Atoms of oxygen, nitrogen, carbon and argon are present in the interstitial solid solutions in treatment of nickel in ambient air; however, oxides are not found even on the surface (in the layer ~200 nm). Interaction of titanium with atmospheric gases leads to formation of a solid solution of nitrogen, oxygen, carbon, hydrogen and argon in titanium and titanium nitride Ti2N (ε). Simultaneous saturation of the titanium surface with nickel and nitrogen in the interaction zone causes formation of phases in the following order: nickel nitride; a solid solution of nitrogen and titanium in nickel and a solid solution of both alloying elements in titanium.

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11

Washino, K., H. S. Tan, A. D. Salman i M. J. Hounslow. "Direct numerical simulation of solid–liquid–gas three-phase flow: Fluid–solid interaction". Powder Technology 206, nr 1-2 (styczeń 2011): 161–69. http://dx.doi.org/10.1016/j.powtec.2010.07.015.

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12

Zongyang, Li, Bi Lin i Chen Jianqiang. "Gas-Solid Interface Interactions Based on Molecular Dynamics Simulations". Journal of Physics: Conference Series 2235, nr 1 (1.05.2022): 012066. http://dx.doi.org/10.1088/1742-6596/2235/1/012066.

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Abstract Gas-solid interface interaction as the key point and difficult point of dilute gas flow, understanding the mechanism of it, to have a clearer understanding of the gas molecules in the solid near-wall surface motion law. This paper combines the molecular dynamics method and particle beam method to simulate the interaction between argon molecules and solid platinum wall surface, to study the scattering law after the collision between gas molecules and solid surface at different incidence angles and the mechanism of energy conversion between them, the results show that the tangential kinetic energy is lost after the collision between gas molecules and wall surface, while the change of normal kinetic energy is determined by the magnitude of the incident velocity; the incident velocity is small, the reflected tangential velocity distribution basically fits the Maxwell reflection distribution when the incident velocity reaches a high speed, and the reflected tangential velocity distribution appears head-and-shoulder or even bimodal distribution, which is helpful for future research on the tangential momentum adaptation coefficient of the scattering nucleus model.

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13

Yang, Youqing, Pengtao Sun i Zhen Chen. "Combined MPM-DEM for Simulating the Interaction Between Solid Elements and Fluid Particles". Communications in Computational Physics 21, nr 5 (27.03.2017): 1258–81. http://dx.doi.org/10.4208/cicp.oa-2016-0050.

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AbstractHow to effectively simulate the interaction between fluid and solid elements of different sizes remains to be challenging. The discrete element method (DEM) has been used to deal with the interactions between solid elements of various shapes and sizes, while the material point method (MPM) has been developed to handle the multiphase (solid-liquid-gas) interactions involving failure evolution. A combined MPM-DEM procedure is proposed to take advantage of both methods so that the interaction between solid elements and fluid particles in a container could be better simulated. In the proposed procedure, large solid elements are discretized by the DEM, while the fluid motion is computed using the MPM. The contact forces between solid elements and rigid walls are calculated using the DEM. The interaction between solid elements and fluid particles are calculated via an interfacial scheme within the MPM framework. With a focus on the boundary condition effect, the proposed procedure is illustrated by representative examples, which demonstrates its potential for a certain type of engineering problems.

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14

Niu, Dong, i Hongtao Gao. "Thermal Conductivity of Ordered Porous Structures Coupling Gas and Solid Phases: A Molecular Dynamics Study". Materials 14, nr 9 (26.04.2021): 2221. http://dx.doi.org/10.3390/ma14092221.

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Heat transfer in a porous solid−gas mixture system is an important process for many industrial applications. Optimization design of heat insulation material is very important in many fields such as pipe insulation, thermal protection of spacecraft, and building insulation. Understanding the micro-mechanism of the solid−gas coupling effect is necessary for the design of insulation material. The prediction of thermal conductivity is difficult for some kinds of porous materials due to the coupling impact of solid and gas. In this study, the Grand Canonical Monte Carlo method (GCMC) and molecular dynamics simulation (MD) are used to investigate the thermal conductivity for the ordered porous structures of intersecting square rods. The effect of gas concentration (pressure) and solid−gas interaction on thermal conductivity is revealed. The simulation results show that for different framework structures the pressure effect on thermal conductivity presents an inconsistent mode which is different from previous studies. Under the same pressure, the thermal conductivity is barely changed for different interactions between gas and solid phases. This study provides the feasibility for the direct calculation of thermal conductivity for porous structures coupling gas and solid phases using molecular dynamics simulation. The heat transfer in porous structures containing gas could be understood on a fundamental level.

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Yang, Mingyang, Qiang Sheng, Lin Guo, Hu Zhang i Guihua Tang. "How Gas–Solid Interaction Matters in Graphene-Doped Silica Aerogels". Langmuir 38, nr 7 (7.02.2022): 2238–47. http://dx.doi.org/10.1021/acs.langmuir.1c02777.

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Gavrilov, K. I., i V. P. Lyubivoi. "Solid-liquid interaction in activating gas-free powder-system combustion". Combustion, Explosion, and Shock Waves 25, nr 4 (1990): 446–48. http://dx.doi.org/10.1007/bf00751554.

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17

TAKEUCHI, Hideki, Kyoji YAMAMOTO i Toru HYAKUTAKE. "Molecular dynamics study of gas-solid interaction for diatomic molecule". Proceedings of Conference of Chugoku-Shikoku Branch 2004.42 (2004): 373–74. http://dx.doi.org/10.1299/jsmecs.2004.42.373.

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18

Genevaux, J. M., i D. Bernardin. "THE LATTICE GAS METHOD AND INTERACTION WITH AN ELASTIC SOLID". Journal of Fluids and Structures 10, nr 8 (listopad 1996): 873–92. http://dx.doi.org/10.1006/jfls.1996.0057.

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Golovin, A. A. "Thermocapillary interaction between a solid particle and a gas bubble". International Journal of Multiphase Flow 21, nr 4 (sierpień 1995): 715–19. http://dx.doi.org/10.1016/0301-9322(95)00001-e.

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Hrma, P., J. Bartoň i T. L. Tolt. "Interaction between solid, liquid and gas during glass batch melting". Journal of Non-Crystalline Solids 84, nr 1-3 (lipiec 1986): 370–80. http://dx.doi.org/10.1016/0022-3093(86)90799-4.

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21

Mohammad Nejad, Shahin, Silvia Nedea, Arjan Frijns i David Smeulders. "The Influence of Gas–Wall and Gas–Gas Interactions on the Accommodation Coefficients for Rarefied Gases: A Molecular Dynamics Study". Micromachines 11, nr 3 (19.03.2020): 319. http://dx.doi.org/10.3390/mi11030319.

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Molecular dynamics (MD) simulations are conducted to determine energy and momentum accommodation coefficients at the interface between rarefied gas and solid walls. The MD simulation setup consists of two parallel walls, and of inert gas confined between them. Different mixing rules, as well as existing ab-initio computations combined with interatomic Lennard-Jones potentials were employed in MD simulations to investigate the corresponding effects of gas-surface interaction strength on accommodation coefficients for Argon and Helium gases on a gold surface. Comparing the obtained MD results for accommodation coefficients with empirical and numerical values in the literature revealed that the interaction potential based on ab-initio calculations is the most reliable one for computing accommodation coefficients. Finally, it is shown that gas–gas interactions in the two parallel walls approach led to an enhancement in computed accommodation coefficients compared to the molecular beam approach. The values for the two parallel walls approach are also closer to the experimental values.

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Zhang, Xinwei, Yonggang Yu i Yubo Hu. "Experimental Study on Gas–Liquid–Solid Interaction Characteristics in the Launch Tube". Journal of Marine Science and Engineering 10, nr 9 (3.09.2022): 1239. http://dx.doi.org/10.3390/jmse10091239.

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In the present study, a visual experimental system was built to explore the multiphase hydrodynamic features in the underwater launching process. The whole processes of gas-curtain generation produced by multichannel jet convergence, gas-curtain expansion, and projectile movement were captured using direct photography. The experimental results show that as the area of a single groove grows from 6.25 mm2 to 11.25 mm2, the gas-curtain displacement grows by 47.5%, and the projectile’s speed reduces by 34.1%. The expansion of the gas curtain can be aided by 36.0% by increasing the number of sidewall grooves within a specified range (4 to 8), but the vehicle’s speed is reduced by 53.8%. While increasing the maximum injection pressure from 9.9 MPa to 18.2 MPa, the gas curtain’s draining capability is improved by 29.6%, and the projectile speed increment diminishes (only 10.0%) as the amount of gas flowing into the front of the projectile grows. The impact of jet parameters on gas-curtain displacement and projectile speed is revealed in this study, which is of utmost significance to the parameter-matching design of underwater low-resistance launchers.

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Hadjoudis, E. "Gas-Solid Reactions : Part VI. Interaction of Solid Chalcones With Bromine and Iodine Vapours". Molecular Crystals and Liquid Crystals 134, nr 1 (kwiecień 1986): 237–44. http://dx.doi.org/10.1080/00268948608079587.

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Yang, P., J. Xiang, M. Chen, F. Fang, D. Pavlidis, J. P. Latham i C. C. Pain. "The immersed-body gas-solid interaction model for blast analysis in fractured solid media". International Journal of Rock Mechanics and Mining Sciences 91 (styczeń 2017): 119–32. http://dx.doi.org/10.1016/j.ijrmms.2016.10.006.

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Shen, Wei Jun, Xi Zhe Li, Jia Liang Lu i Xiao Hua Liu. "The Fluid-Solid Coupling Seepage Mathematical Model of Shale Gas". Applied Mechanics and Materials 275-277 (styczeń 2013): 598–602. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.598.

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In this paper, the stress equation is available by introducing the principle of effective stress in porous media into fluid-solid coupling seepage and considering the conditions of equilibrium. According to the continuity equation of fluid mechanics, considering the interactions between shale gas and rock-soil body, the differential equation of seepage flow is obtained. Through introducing the velocity component of rock particles into the seepage field, the pore fluid pressure in seepage field is introduced into the deformation field, so as to realize the interaction between the fluid-solid coupling seepage. Based on auxiliary boundary conditions in the above equations, the paper establishes the integrated fluid-coupling seepage mathematical model of shale gas, and it will provide the corresponding theoretical and realistic significance in the development of shale gas.

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Dilla, Martin, Ahmet E. Becerikli, Alina Jakubowski, Robert Schlögl i Simon Ristig. "Development of a tubular continuous flow reactor for the investigation of improved gas–solid interaction in photocatalytic CO2 reduction on TiO2". Photochemical & Photobiological Sciences 18, nr 2 (2019): 314–18. http://dx.doi.org/10.1039/c8pp00518d.

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Yang, Changbao, Zhisheng Wang, Zhe Chen, Yuanwei Lyu i Jingyang Zhang. "Numerical Investigation of Unsteady Characteristics of Gas Foil Journal Bearings with Fluid–Structure Interaction". Aerospace 10, nr 7 (5.07.2023): 616. http://dx.doi.org/10.3390/aerospace10070616.

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Gas foil journal bearings (GFJBs) have been widely employed in high-speed rotating machinery in the aviation industry. However, the role of fluid–structure interaction in the unsteady aerodynamic character of the gas film and the dynamic response of the elastic foils have not yet been clarified. In this study, an unsteady shearing flow interacting with an exciting deformation of the top or bump foils was investigated by means of a large eddy simulation with bidirectional fluid–structure interaction (BFSI). The result shows that the main frequencies and amplitudes of stable fluctuations of different flow field parameters at different positions are different. The oscillating duration in the solid domain is much less than that in the fluid domain. The main positions for the interaction between the gas film pressure and the elastic foil are on both sides of θ = π. Compared with the case without FSI, the presence of the elastic foil flattens the distribution of the pressure of the gas film. As the rotational speed increases, the main frequency and the amplitude of pressure in the fluid domain continuously increase. With FSI, there is no interference frequency near the main frequency, which improves the stability of the shearing flow. However, an interference frequency appears near the main frequency of total displacement in the solid domain. The analysis in this paper lays the foundation for unsteady fluid–structure interaction research.

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Wang, Deng Ke, Jian Ping Wei, Heng Jie Qin i Le Wei. "Research on Solid-Gas Coupling Dynamic Model for Loaded Coal Containing Gas". Advanced Materials Research 594-597 (listopad 2012): 446–51. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.446.

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Considering the variation of the porosity and permeability of coal containing gas at differential deformation stages, a dynamic model for porosity and permeability is developed based on the previous researches. Furthermore, taking coal containing gas as a kind of isotropic elastoplastic material and taking into account the effect of gas adsorption, the stress and seepage equations are derived and, the solid gas coupling model for coal containing gas is constructed, which is appropriate to describe the skeleton deformability of coal containing gas and the compressibility of gas under the solid-gas interaction condition. In addition, the numerical simulation model is built by using the finite element method, and the numerical calculation solution of the model for a special loading case is given in term of the constraint conditions and corresponding parameters. The research results may have significance for further enriching and improving solid-gas coupling theories for coal containing gas.

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Wu, Jing, Xiong Chen i Xi Yu. "Numerical Analysis of Fluid-Structure Interaction during Ignition Process for Solid Rocket Motor with Stress-Reliver". Applied Mechanics and Materials 184-185 (czerwiec 2012): 328–32. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.328.

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During the start-up of ignition process, the solid rocket motor is typically involved in fluid-structure coupling process. The propellant deforms under the gas pressure, thereby influents the gas flow in turn. The aim of this paper is to investigate the coupled effect between fluid and structure during the start-up of ignition process in solid rocket motor by coupling Fluent and Abaqus via MpCCI. The numerical result shows that during the initial stage, the gas flows onto the structural surface. There is a relative enclosure space in thewing slot inside the motor, which causes big deformation on propellant grain and stress reliever. This space is the high-risk area for structural deboning in solid rocket motor.

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Kuzenov, Victor V., Sergei V. Ryzhkov i Aleksey Yu Varaksin. "The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment". Mathematics 10, nr 12 (19.06.2022): 2130. http://dx.doi.org/10.3390/math10122130.

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This paper considers the problem associated with the numerical simulation of the interaction between the cocurrent stream occurring near a monoblock moving in the gas medium and solid fuel combustion products flowing from a solid fuel rocket engine (SFRE). The peculiarity of the approach used is the description of gas-dynamic processes inside the combustion chamber, in the nozzle block, and the down jet based on a single calculation methodology. In the formulated numerical methodology, the calculation of gas-dynamic parameters is based on the solution of unsteady Navier–Stokes equations and the application of a hybrid computational grid. A hybrid block-structured computational grid makes it possible to calculate gas flow near bodies of complex geometric shapes. The simulation of the main phase of interaction, corresponding to the stationary mode of rocket flight in the Earth’s atmosphere, has been carried out. A conjugated simulation of the internal ballistics of SFRE and interaction of combustion products jets is conducted.

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Levin, V. A., I. S. Manuylovich i V. V. Markov. "Mathematical modeling of shock-wave processes under gas solid boundary interaction". Proceedings of the Steklov Institute of Mathematics 281, nr 1 (lipiec 2013): 37–48. http://dx.doi.org/10.1134/s0081543813040056.

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Leshansky, A. M., A. A. Golovin i A. Nir. "Thermocapillary interaction between a solid particle and a liquid-gas interface". Physics of Fluids 9, nr 10 (październik 1997): 2818–27. http://dx.doi.org/10.1063/1.869394.

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Mozyrsky, Dima, Vladimir Privman i M. Lawrence Glasser. "Indirect Interaction of Solid-State Qubits via Two-Dimensional Electron Gas". Physical Review Letters 86, nr 22 (28.05.2001): 5112–15. http://dx.doi.org/10.1103/physrevlett.86.5112.

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34

Nakamura, Masato, Masaru Tsukada i Masakazu Aono. "Interaction of low-velocity rare-gas ions with a solid surface". Surface Science Letters 283, nr 1-3 (marzec 1993): A232. http://dx.doi.org/10.1016/0167-2584(93)90655-3.

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Amelyushkin, I. A., i A. L. Stasenko. "Simulation of gas-dispersed flow particles’ interaction with a solid body". Journal of Physics: Conference Series 1560 (czerwiec 2020): 012064. http://dx.doi.org/10.1088/1742-6596/1560/1/012064.

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36

Nakamura, Masato, Masaru Tsukada i Masakazu Aono. "Interaction of low-velocity rare-gas ions with a solid surface". Surface Science 283, nr 1-3 (marzec 1993): 46–51. http://dx.doi.org/10.1016/0039-6028(93)90957-l.

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37

Subramanian, V., M. G. Lakshmikantha i J. A. Sekhar. "Dynamic modeling of the interaction of gas and solid phases in multistep reactive micropyretic synthesis". Journal of Materials Research 10, nr 5 (maj 1995): 1235–46. http://dx.doi.org/10.1557/jmr.1995.1235.

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A mathematical model of micropyretic synthesis, including the consideration of pressure rise (due to gas evolution) in a porous compact, is developed for a multistep reaction. D'Arcy's law of gas flow, continuity equation, and gas law are combined to obtain a relationship between the pressure and temperature of gas. This equation for the gas pressure is solved along with the energy equations of gas and solid phase. The numerical analysis shows that the magnitude of pressure increase depends on the initial gas pressure, temperature, and permeability. When gas evolution is considered, the pressure increase depends on the variables that determine the kinetics of the gas evolution reaction, such as the activation energy and the pre-exponential factor. The pressure increase is maximum when the gas evolution takes place in the combustion reaction zone. The gas evolution is noted not to influence the combustion wave propagation.

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38

Babenko P. Yu., Zinoviev A. N., Mikhailov V. S., Tensin D.S. i Shergin A. P. "The ion-solid interaction potential determination from the backscattered particles spectra". Technical Physics Letters 48, nr 7 (2022): 50. http://dx.doi.org/10.21883/tpl.2022.07.54039.19231.

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The values of the atomic particle-solid potential were obtained for the first time from experimental data on the energy spectra and angular dependences of backscattered particles. The proposed procedure for determining the potential has never been applied previously. It is shown that the obtained data do not depend on the potential approximation used. The ion-solid interaction potential differs markedly from the potential describing collisions in the gas phase. The screening constant increases by 10-15%. The increase in screening is due to an increase in the density of the electron gas in the region between the incident particle and scattering center. Keywords: interatomic interaction potential, energy spectra, scattering of atomic particles on the surface.

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39

Gumbs, Godfrey, i Danhong Huang. "INTERBAND ANYON PLASMON EXCITATIONS IN AN ALTERNATING-LAYERED INTERACTING ANYON GAS SYSTEM". International Journal of Modern Physics B 05, nr 10 (czerwiec 1991): 1597–605. http://dx.doi.org/10.1142/s0217979291001504.

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With the use of a self-consistent mean-field theory, where the anyon gauge field is approximated by its expectation value and the Coulomb interaction is calculated in the Hartree approximation, we have calculated the coupled acoustic anyon plasmon modes for an alternating-layered interacting anyon gas structure. In a single-layer system, we obtain a phonon mode for a noninteracting anyon gas. This is different from the result given by the random- phase approximation. When the Coulomb interaction is included, this phonon mode is suppressed. In a multi-layered system, we get an acoustic anyon plasmon mode with its sound velocity renormalized by the Coulomb interaction. The uniform liquid ground state is shown to be stable against solid crystallization.

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40

Regály, Zs. "Torques felt by solid accreting planets". Monthly Notices of the Royal Astronomical Society 497, nr 4 (29.08.2020): 5540–49. http://dx.doi.org/10.1093/mnras/staa2181.

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ABSTRACT The solid material of protoplanetary discs forms an asymmetric pattern around a low-mass planet ($M_\mathrm{p}\le 10\, \mathrm{ M}_\oplus$) due to the combined effect of dust–gas interaction and the gravitational attraction of the planet. Recently, it has been shown that although the total solid mass is negligible compared to that of gas in protoplanetary discs, a positive torque can be emerged by a certain size solid species. The torque magnitude can overcome that of gas which may result in outward planetary migration. In this study, we show that the accretion of solid species by the planet strengthens the magnitude of solid torque being either positive or negative. We run two-dimensional, high-resolution ($1.5\,\rm {K}\times 3\,\rm {K}$) global hydrodynamic simulations of an embedded low-mass planet in a protoplanetary disc. The solid material is handled as a pressureless fluid. Strong accretion of well-coupled solid species by an $M_\mathrm{p}\lesssim 0.3\, \mathrm{ M}_\oplus$ protoplanet results in the formation of such a strongly asymmetric solid pattern close to the planet that the positive solid torque can overcome that of gas by two times. However, the accretion of solids in the pebble regime results in increased magnitude negative torque felt by protoplanets and strengthened positive torque for Earth-mass planets. For $M_\mathrm{p}\ge 3\, \mathrm{ M}_\oplus$ planets, the magnitude of the solid torque is positive, however, independent of the accretion strength investigated. We conclude that the migration of solid accreting planets can be substantially departed from the canonical type-I prediction.

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41

Peng, Xu, Guoning Rao, Bin Li, Shunyao Wang i Wanghua Chen. "Investigation on the Gas–Solid Two-Phase Flow in the Interaction between Plane Shock Wave and Quartz Sand Particles". Applied Sciences 10, nr 24 (10.12.2020): 8859. http://dx.doi.org/10.3390/app10248859.

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The interaction between a shock wave and solid particles involves complex gas–solid two-phase flow, which is widely used in industrial processes. Theoretical analysis, an experimental test, and simulation were combined to investigate the interaction process between a shock wave and quartz sand particles. The variation of physical parameters of the two phases during the interaction process was considered theoretically. Then, a novel vertical shock tube generator was employed to record the pressure attenuation and dispersion process of solid particles. Finally, the complex gas–solid two-phase flow was simulated based on the computational fluid dynamics method. The results showed that a nonequilibrium state was formed during the interaction process and momentum exchange generated, resulting in a drag force of the shock wave on the particles. The shock intensity obviously attenuated after the shock wave passed through the solid particles, and this part of the energy was work on the solid particles to drive their dispersion. A three-dimensional annular vortex was generated around the solid particles due to the entrainment effect of airflow. Under the shock wave action of 1.47 Ma, the three types of solid particles with average diameters of 2.5, 0.95, and 0.42 mm presented different motion laws. The particles with smaller size were easier to disperse, and the cloud that formed was larger and more uniform.

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Zhou, An Ning, Tie Shuan Zhang, Xiu Bin Ren i Li Zhen Zheng. "CFD Modeling of the Fast Pyrolysis of Coal in Cold Flow Fluidized Bed". Advanced Materials Research 396-398 (listopad 2011): 209–12. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.209.

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Abstract. Gas-solid fluidized beds are widely applied in many industries as reactors or heat/mass transferring units because of their good heterogeneous mixing behaviors and large transferring area between the gas and solid phases. In this study, based on the Eulerian-Eulerian approach, 2D model of gas-solid flow field in fluidized bed is simulated, and the drag force models of Gidaspow and Syamlal-O’Brien have been used to simulate and analyze the two-phase flow for exploring mechanism and interaction laws of two-phase flow.

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Chang, Cheng, i Su Hua. "Analysis on Thermal-Fluid-Solid Interaction of Straight Pad Finger Seal Performance". Applied Mechanics and Materials 249-250 (grudzień 2012): 498–504. http://dx.doi.org/10.4028/www.scientific.net/amm.249-250.498.

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Aimed at the structure and working condition analysis of the straight pad finger seal, an analysis model of the straight pad finger seal which contains three complete fingers is presented. And then the influence of heat effect to the seal structure body and fluid flow state is considered in the model. By using the thermal-fluid-solid interaction numerical calculation method, the working performance of the non-contacting finger seal and its change law with working condition is studied in the paper. The straight pad finger seal's leakage rate, gas film lift capacity and gas film flow field characteristics in different working conditions are analyzed. The results show that the gas film between finger foot and rotor has radial lift capacity, which can meet the requirement of reducing wear. And since the deformation of whole finger foot is relatively uniform, it is hard to have the appearance of circumferential warp. It is advantageous to adapt to the rotor radial runout and deflection. The performance of straight pad finger seal is influenced much more by the high-to low-pressure differential and the gas temperature of high pressure chamber. The work presented here provides helpful reference and theoretical basis to design the non-contacting finger seal with high performance.

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Bao, Fubing, Zhihong Mao i Limin Qiu. "Study of gaseous velocity slip in nano-channel using molecular dynamics simulation". International Journal of Numerical Methods for Heat & Fluid Flow 24, nr 6 (29.07.2014): 1338–47. http://dx.doi.org/10.1108/hff-04-2013-0145.

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Purpose – The purpose of this paper is to investigate the gas flow characteristics in near wall region and the velocity slip phenomenon on the wall in nano-channels based on the molecular dynamics simulation. Design/methodology/approach – An external gravity force was employed to drive the flow. The density and velocity profiles across the channel, and the velocity slip on the wall were studied, considering different gas temperatures and gas-solid interaction strengths. Findings – The simulation results demonstrate that a single layer of gas molecules is adsorbed on wall surface. The density of adsorption layer increases with the decrease of gas temperature and with increase of interaction strength. The near wall region extents several molecular diameters away from the wall. The density profile is flatter at higher temperature and the velocity profile has the traditional parabolic shape. The velocity slip on the wall increases with the increase of temperature and with decrease of interaction strength linearly. The average velocity decreases with the increase of gas-solid interaction strength. Originality/value – This research presents gas flow characteristics in near wall region and the velocity slip phenomenon on the wall in nano-channels. Some interesting results in nano-scale channels are obtained.

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45

Zhang, Fengyan, i Haidong Wang. "Optimization of Drilling Parameters in Influence Area of Gas–Solid Interaction during Parallel Drilling Hole". Processes 11, nr 8 (7.08.2023): 2371. http://dx.doi.org/10.3390/pr11082371.

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Previous studies have established that the selection of gas extraction borehole parameters is crucial for the effectiveness of gas extraction. To more accurately determine the reasonable extraction radius of gas extraction boreholes in the coal seam, this study was based on the actual occurrence conditions of the coal body. A coal-seam gas-seepage model, considering dynamic changes in permeability under gas–solid coupling conditions, was constructed. It was combined with FLAC3D numerical simulations to develop a borehole extraction model closer to the field’s natural needs. The study revealed the influence of borehole diameter and spacing on gas extraction, obtained the radius of effect of borehole extraction, and optimized the gas extraction borehole parameters based on data simulation experiments. Multiple sets of experimental results indicated that the optimal parameters are a borehole diameter of φ = 113 mm and a borehole spacing of 5 m. Applying these parameters in on-site tests at the 14,303 working faces of a particular mine significantly improved gas extraction efficiency, with a 29.7% increase in gas extraction concentration. This verified the accuracy of the simulation results and provides a scientific basis for cost reduction and efficiency enhancement in wellbore mining.

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46

Liu, Tong, Min Shan Liu i Qi Wu Dong. "The Influence of Solid Wall-Fluid Molecular Interaction on Transport Properties of Gases in a Mini/micro Channel". Advanced Materials Research 354-355 (październik 2011): 9–18. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.9.

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The physical model and analytical method are put forward for considering the molecular interaction between solid wall and gas fluid when dealing with convective heat transfer in macro/mini/micro channels based on the boundary layer theory concept, the molecular kinetic theory of gases, structural chemistry and continuum hypothesis. The influence rule of wall-fluid intermolecular forces to the transport properties of gases located in boundary layer region is studied applying proposed models. The gas density variation distribution equation including the wall-fluid molecular interaction is derived with continuum media integral approach. The theoretical results show that the fluid diffusion is independent of the wall-fluid interaction but visosity and heat conductivity not. According to the gas molecular density distribution function and molecular dynamics, new formulae were developed for calculating viscidity coefficient and thermal conductivity with wall-fluid interacting effect for a fluid. The research results provide scientific reference for further study and exploitation on fluid flow and heat transfer of mini/micro channels. In addition, the formulae offered in this paper to compute the transport properties of gases are also suitable for fine analysis of boundary layer in macro-scale channels.

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Borisov, Sergey, Julia Gloukhovskaya, Sergey Dobrovolskiy, Alexander Myakochin i Igor Podporin. "Mechanism of the powder material particle in different phase states—solid substrate interaction". MATEC Web of Conferences 362 (2022): 01005. http://dx.doi.org/10.1051/matecconf/202236201005.

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The paper discusses impact of solid and molten particles of a powder material in heterogeneous flow acting on solid surface and its effect on characteristics of coating applied by a gas-dynamic (cold spray) method. An equation of energy balance in impact zone of the particle on the substrate is given. Obtained equation accounts the particle size, mass average temperatures in heated portions of the particle and the substrate, before impact temperatures of the particle and the substrate, fraction of the heated mass of the particle and the substrate during impact, specific heat capacities of the particle and the substrate material, the Brinell characteristic, and deformation of a solid particle. Results of the bibliographic study of the molten metal droplet formation, their kicks in the substrate depending on its velocity, substrate temperature and surrounding gas pressure are presented. The differences in the impact mechanism of solid and molten particles on the substrate and their influence on the coating formation and its properties are determined. Recommendations for operating parameters of high-quality coating are given.

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Cocco, Giorgio, G. Mulas i Liliana Schiffini. "Gas-Solid Interaction in Milling Processes: Mechanochemical Hydrogenation Reactions via Metal Hydrides". Materials Science Forum 179-181 (luty 1995): 281–86. http://dx.doi.org/10.4028/www.scientific.net/msf.179-181.281.

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Chalon, F., i F. Montheillet. "The Interaction of Two Spherical Gas Bubbles in an Infinite Elastic Solid". Journal of Applied Mechanics 70, nr 6 (1.11.2003): 789–98. http://dx.doi.org/10.1115/1.1629110.

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The elastic strain and stress fields between two bubbles of different sizes and different pressures were estimated by using the fundamental result of Eshelby. The equivalent inclusion method was extended to the case of two inclusions in an infinite elastic solid. This approach, which remains totally analytical, was compared successfully to finite element calculations. The mean stress provides information about gas diffusion between the bubbles: according to the results, the bubbles are likely to progressively equalize their sizes. Moreover, the derivation of the von Mises equivalent stress showed that its value, in the vicinity of the bubbles, is larger than the elasticity limit. Therefore, for a complete mechanical description of the problem, plasticity should be taken into account. In spite of its simplicity, this method nevertheless leads to results, which are very close to the prediction of numerical calculations.

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Serdyuk, Y. V., i S. M. Gubanski. "Computer modeling of interaction of gas discharge plasma with solid dielectric barriers". IEEE Transactions on Dielectrics and Electrical Insulation 12, nr 4 (sierpień 2005): 725–35. http://dx.doi.org/10.1109/tdei.2005.1511098.

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