Gotowe bibliografie tematyczne / Hydrodynamics- Liquid flow

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Gotowa bibliografia na temat „Hydrodynamics- Liquid flow”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Hydrodynamics- Liquid flow"

Tojimatovich, Karimov Ikromali, i Rakhmanov Abdukhalim Toshpulat Ugli. "HYDRODYNAMICS OF HEAVY LIQUIDS IN A BUBBLING EXTRACTOR". International Journal of Advance Scientific Research 03, nr 06 (1.06.2022): 91–99. http://dx.doi.org/10.37547/ijasr-02-06-13.

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The article proposes a formula for calculating the flow rate of a heavy liquid supplied to the mixing zones of the apparatus. The experimental setup presents the results and analysis of experimental studies carried out to determine the flow rate of heavy liquid in the mixing zone of the bubbling extractor. The analysis confirmed the accuracy of the theoretical equation proposed for calculating the heavy liquid flow rate. According to the results of the study, it was possible to determine the flow rate of heavy liquid depending on the size and coefficient of resistance of the holes.

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Gupta, Raghvendra, Sharon S. Y. Leung, Rogerio Manica, David F. Fletcher i Brian S. Haynes. "Hydrodynamics of liquid–liquid Taylor flow in microchannels". Chemical Engineering Science 92 (kwiecień 2013): 180–89. http://dx.doi.org/10.1016/j.ces.2013.01.013.

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Jovanović, Jovan, Wenya Zhou, Evgeny V. Rebrov, T. A. Nijhuis, Volker Hessel i Jaap C. Schouten. "Liquid–liquid slug flow: Hydrodynamics and pressure drop". Chemical Engineering Science 66, nr 1 (styczeń 2011): 42–54. http://dx.doi.org/10.1016/j.ces.2010.09.040.

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Lin, Fanghua, i Changyou Wang. "Recent developments of analysis for hydrodynamic flow of nematic liquid crystals". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, nr 2029 (28.11.2014): 20130361. http://dx.doi.org/10.1098/rsta.2013.0361.

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The study of hydrodynamics of liquid crystals leads to many fascinating mathematical problems, which has prompted various interesting works recently. This article reviews the static Oseen–Frank theory and surveys some recent progress on the existence, regularity, uniqueness and large time asymptotic of the hydrodynamic flow of nematic liquid crystals. We will also propose a few interesting questions for future investigations.

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Wang, Yi. "CFD Simulation on Hydrodynamics of Liquid-Liquid Slug Flow in Microchannel". Advanced Materials Research 936 (czerwiec 2014): 1662–65. http://dx.doi.org/10.4028/www.scientific.net/amr.936.1662.

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Hydrodynamics in a liquid-liquid slug flow in a T-junction microchannel of 600μm diameter, operated under a squeezing regime, was simulated with the computational fluid dynamics method. The slug flow generation simulated shows very good agreement with experimental snapshots where the clear slug formation takes place in the vicinity of the T-junction. The internal circulation within each slug was also obtained, which could make us better understand the hydrodynamics of liquid-liquid slug flow in microchannel.

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Nieves-Remacha, María José, Amol A. Kulkarni i Klavs F. Jensen. "Hydrodynamics of Liquid–Liquid Dispersion in an Advanced-Flow Reactor". Industrial & Engineering Chemistry Research 51, nr 50 (4.12.2012): 16251–62. http://dx.doi.org/10.1021/ie301821k.

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Kashid, M. N., D. Fernández Rivas, D. W. Agar i S. Turek. "On the hydrodynamics of liquid-liquid slug flow capillary microreactors". Asia-Pacific Journal of Chemical Engineering 3, nr 2 (marzec 2008): 151–60. http://dx.doi.org/10.1002/apj.127.

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Conan, C., O. Masbernat, S. Décarre i A. Liné. "Local hydrodynamics in a dispersed-stratified liquid–liquid pipe flow". AIChE Journal 53, nr 11 (2007): 2754–68. http://dx.doi.org/10.1002/aic.11309.

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Zhuang, Tieshuan, Jun Wu, Tao Zhang i Xiangwei Dong. "A weakly compressible smoothed particle hydrodynamics framework for melting multiphase flow". AIP Advances 12, nr 2 (1.02.2022): 025329. http://dx.doi.org/10.1063/5.0057583.

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In this study, the transient process of solid–liquid phase change is modeled and simulated by the multiphase smoothed particle hydrodynamics (SPH) method. First, to simulate the interfacial behaviors of melt liquids, the multiphase SPH model is established for immiscible viscous fluids with a large density ratio, where the environmental liquid surrounding the solid phase is considered, and the surface tension of the melt liquid can be accurately modeled by the continuum surface force method. Based on the multiphase model, the thermal dynamics model is incorporated to describe the heat conduction process. The solid–liquid phase change is realized by directly switching the state of the concerned SPH particle, where the absorbed latent heat is computed by the phase change model. Second, the model is validated by several simulation cases, including the Stefan problem, hydrostatic pressure of the evolving fluid interface, rising of two bubbles, and square droplet deformation, and the effects of numerical parameters on simulation accuracy and stability are also discussed. Third, the integrated SPH model is applied to simulate molten droplet formation and dropping processes. The results show that an initial solid–liquid interface disappears during the melting process, and new liquid–liquid interfaces gradually form and evolve under the action of surface tension, gravity, and viscosity. Phenomena such as thin-layer fluid dynamics and capillary instabilities are also reproduced, showing the effectiveness of the model for handling multiphase flow with heat conduction and phase change.

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Dijk, P. E., A. M. C. Janse, J. A. M. Kuipers i W. P. M. van Swaaij. "Hydrodynamics of liquid flow in a rotating cone". International Journal of Numerical Methods for Heat & Fluid Flow 11, nr 5 (sierpień 2001): 386–412. http://dx.doi.org/10.1108/09615530110397334.

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Rozprawy doktorskie na temat "Hydrodynamics- Liquid flow"

Abadie, Thomas. "Hydrodynamics of gas-liquid Taylor flow in microchannels". Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/11986/1/abadie.pdf.

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This thesis focuses on the hydrodynamics of gas-liquid Taylor flow (or slug flow) in microchannels. These flows, which are generally dominated by surface tension forces, have been investigated in rectangular channels of various cross-sectional aspect ratios by means of both experimental visualizations and numerical simulations. The first experimental part aims at characterizing the bubble generation process (bubble length and frequency of break-up) depending on the operating conditions, the fluid properties, as well as the junction where both fluids merge. Numerical simulations of fully developed Taylor flow have been carried out with the JADIM code. The computation of such surface tension dominated flows requires an accurate calculation of the surface tension force. Some limitations of the Volume of Fluid method have been highlighted and a Level Set method has been developed in order to improve the calculation of capillary effects. Both methods have been compared in detail in terms of spurious currents. 3D numerical simulations have been performed and the influence of the capillary number, as well as the effects of geometry have been highlighted. Inertial effects have been taken into account and their influence on the pressure drop has been shown to be non-negligible. Mixing in the liquid slug has also been studied.

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Welsh, Susan A. "Hydrodynamic characteristics of countercurrent gas-pseudoplastic liquid two-phase channel flow". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16923.

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Van, der Merwe Werner. "The Morphology of Trickle Flow Liquid Holdup". Diss., University of Pretoria, 2005. http://hdl.handle.net/2263/31385.

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Gravity driven trickle flow of a liquid over a fixed bed in the presence of a gaseous phase is widely encountered throughout the process industry. It is one of the most common ways of contacting multi-phase fluids for reaction or mass transfer purposes. The presence of three phases greatly complicates the mathematical modelling of trickle-bed reactors and makes a description from first principles difficult. Trickle flow performance is usually characterized in terms of hydrodynamic parameters. One such parameter is the liquid holdup. The value and morphology (shape or texture) of the holdup influences the catalyst contacting, wetting, mass transfer characteristics and ultimately the performance of the trickle flow unit. This study is limited to the air-water-glass spheres system with no gas flow. It is partitioned into three sections. An investigation into the nature of the residual liquid holdup in beds of spherical particles revealed that the general assumption that all residual liquid is held in the form of pendular rings at particle contact points proves to be untrue. Instead, indication is that 48 % of the residual holdup is present in the form of agglomerated liquid globules in interstices of low local porosity. Theoretical residual liquid holdup models and residual liquid holdup-based mass transfer models should include this phenomenon. In a subsequent section, the influence of the prewetting procedure on the operating holdup is investigated. Three distinct limiting cases are identified: Kan-wetted, Levec-wetted and non-wetted. A volumetric utilization coefficient that describes the extent to which the bed is irrigated is developed. It indicates that large fractions of the bed remain non-irrigated in the Levec- and non-wetted modes. A momentum balance-based model is adopted to predict the Kan-wetted mode holdup. This model was successfully extended to predicting the holdup in the Levec- and non-wetted modes by simple incorporation of the volumetric utilization coefficient. The predictive capability of this model is highly satisfactory, especially in light of it using only the classical Ergun constants and no fitted parameters (AARE = 9.6 %). The differences in the hysteresis behaviour of holdup and pressure drop in the different modes are attributed to differences in the morphology of the operating holdup. The existence of the three limiting prewetted modes is confirmed by residence time distribution (RTD) analysis of the stimulus-response behaviour of the system. This behaviour was quantified using a NaCl tracer and conductivity measurements at both the inlet and outlet of a bench scale bed. The analyses show that: · There are large fractions of the holdup that is inaccessible to the tracer in the Levec-wetted and non-wetted modes. · The mixedness in the three prewetted modes differ appreciably, with the Kan-wetted mode clearly less mixed than the Levec-wetted mode. The RTD analyses also confirm the existence of the three prewetting modes in a porous system (spherical a-alumina), with a large fraction of the holdup being inaccessible to the tracer in the Levec-wetted mode. This study emphasizes the role of the morphology of the various types of liquid holdup on the hydrodynamic performance of a trickle flow unit. It is apparent that aspects of the morphology depend strongly on phenomena like globule formation, hysteresis and flow and prewetting history that have not been adequately recognized to date. The visualization of the various modes of trickle flow is an intellectual platform from which future studies may be directed.
Dissertation (MEng)--University of Pretoria, 2004.
Chemical Engineering
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Stoodley, Paul. "The influence of liquid flow and nutrients on biofilm structure and behaviour". Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286538.

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Cui, Zhe. "Hydrodynamics in a bubble column at elevated pressures and turbulence energy distribution in bubbling gas-liquid and gas-liquid-solid flow systems". Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1109956144.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xxiii, 187 p.; also includes graphics Includes bibliographical references (p. 179-187). Available online via OhioLINK's ETD Center

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Xie, Tao. "Hydrodynamic characteristics of gas/liquid/fiber three-phase flows based on objective and minimally-intrusive pressure fluctuation measurements". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-09192004-033703/unrestricted/xie%5Ftao%5F200412%5Fphd.pdf.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2005.
D. William Tedder, Committee Member ; Minami Yoda, Committee Member ; Tom McDonough, Committee Member ; Andrei G. Fedorov, Committee Member ; S. Mostafa Ghiaasiaan, Committee Chair ; Seppo Karrila, Committee Member. Includes bibliographical references.

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Van, Houwelingen ArJan. "Liquid-solid contacting in trickle-bed reactors". Thesis, University of Pretoria, 2009. http://hdl.handle.net/2263/30008.

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Several types of reactors are encountered in industry where reagents in a gas and a liquid phase need to be catalysed by a solid catalyst. Common reactors that are used to this end, are trickle-bed reactors, where gas and liquid flow cocurrently down a packed bed of catalyst. Apart from the catalytic process itself, several mass transfer steps can influence the rate and/or selectivity of a solid catalysed gas-liquid reaction. In trickle-bed reactors, flow morphology can have a major effect on these mass transfer steps. This study investigates the interaction between liquid flow morphology and mass transfer in trickle-bed reactors from three different angles. The primary focus is on liquid-solid mass transfer and internal diffusion as affected by the contacting between the liquid and the catalyst. First, the contacting between the liquid and the solid in trickleflow, or wetting efficiency, is characterised using colorimetry. Though this investigation is limited to the flow of nitrogen and water over a packed bed at ambient conditions, it provides useful information regarding liquid flow multiplicity behaviour and its influence on the distribution of fractional wetting on a particle scale. The colorimetric study also provides descriptions of the geometry of the liquid-solid contacting on partially wetted particles. These are used in a second investigation, for the numerical simulation of reaction and diffusion in partially wetted catalysts. This second investigation uses numerical simulations to evaluate and develop simple theoretical descriptions of liquid-solid contacting effects on catalyst particle efficiency. Special attention is given to the case where external and intraparticle mass transfer rates of both a volatile and non-volatile reagent affect the overall rate of reaction. Also, since these are not often considered in theoretical studies, some suggestions are made for the evaluation of the particle efficiency of eggshell catalyst. Finally, liquid-solid contacting is investigated in a high-pressure pilot reactor. Wetting efficiency is measured with a useful technique that does not rely on descriptions of particle kinetics or liquid-solid mass transfer rates. Liquid-solid mass transfer coefficients are also measured and results agree well with the colorimetric investigation, suggesting the existence of different types of flow within in the hydrodynamic multiplicity envelope of trickle-flow. Since it consists of different investigations of liquid-solid contacting from different angles, the study highlights several aspects of liquid-solid contacting and how it can be expected to influence trickle-bed reactor performance.
Thesis (PhD)--University of Pretoria, 2009.
Chemical Engineering
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Yang, Li. "CFD MODELING OF MULTIPHASE COUNTER-CURRENT FLOW IN PACKED BED REACTOR FOR CARBON CAPTURE". UKnowledge, 2015. http://uknowledge.uky.edu/me_etds/59.

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Packed bed reactors with counter-current, gas-liquid flows have been considered to be applicable in CO2 capture systems for post-combustion processing from fossil-fueled power production units. However, the hydrodynamics within the packing used in these reactors under counter-current flow has not been assessed to provide insight into design and operational parameters that may impact reactor and reaction efficiencies. Hence, experimental testing of a laboratory-scale spherical ball, packed bed with two-phase flow was accomplished and then a meso-scale 3D CFD model was developed to numerically simulate the conditions and outcomes of the experimental tests. Also, the hydrodynamics of two-phase flow in a packed bed with structured packing were simulated using a meso-scale, 3D CFD model and then validated using empirical models. The CFD model successfully characterized the hydrodynamics inside the packing, with a focus on parameters such as the wetted surface areas, gas-liquid interactions, liquid distributions, pressure drops, liquid holdups, film thicknesses and flow regimes. The simulation results clearly demonstrated the development of and changes in liquid distributions, wetted areas and film thicknesses under various gas and liquid flow rates. Gas and liquid interactions were observed to occur at the interface of the gas and liquid through liquid entrainment and droplet formation, and it became more dominant as the Reynolds numbers increased. Liquid film thicknesses in the structured packing were much thinner than in the spherical ball packing, and increased with increasing liquid flow rates. Gas flow rates had no significant effect on film thicknesses. Film flow and trickle flow regimes were found in both the spherical ball and structured packing. A macro-scale, porous model was also developed which was less computationally intensive than the meso-scale, 3D CFD model. The macro-scale model was used to study the spherical ball packing and to modify its closure equations. It was found that the Ergun equation, typically used in the porous model, was not suitable for multi-phase flow. Hence, it was modified by replacing porosity with the actual pore volume within the liquid phase; this modification successfully accounted for liquid holdup which was predicted via a proposed equation.

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Serres, Marion. "Étude hydrodynamique d'un écoulement gaz-liquide dans un milieu poreux confiné". Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEN018/document.

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Cette thèse se focalise sur les écoulements gaz-liquide dans un milieu poreux, problématique rencontrée dans des domaines variés allant de la physique fondamentale à la chimie appliquée. Nous avons caractérisé expérimentalement les régimes hydrodynamiques dans deux géométries différentes : un canal millifluidique (écoulement quasi-1D) et une cellule de Hele-Shaw (écoulement quasi-2D). L’originalité de ce travail est d’analyser l’effet du milieu poreux (lits de billes polydisperses ou mousses solides à cellules ouvertes), du confinement (1D/2D) et de la gravité en couplant des approches locales et globales développées dans les communautés de physique expérimentale et de génie chimique. D’une part, une analyse globale a permis de quantifier les pertes de charge [1] et, basée sur le transport d’un traceur fluorescent, les distributions de temps de séjour [2] et le transfert gaz-liquide dans l’expérience 1D ; d’autre part, une analyse locale de la fraction liquide et l’évolution spatio-temporelle de son contenu fréquentiel ont permis de mettre en évidence deux régimes hydrodynamiques dans le canal millifluidique [3-5] : un régime pseudo-Taylor, où les caractéristiques de l’écoulement périodique amont sont conservées, et un régime modulé, pour lequel l’écoulement se désorganise à l’entrée du milieu poreux. Un modèle phénoménologique basé sur la propagation des bulles dans le milieu est proposé, et rend compte de l’existence de ces deux régimes [4,5]. Enfin, ces deux analyses sont couplées pour étudier les écoulements dans la cellule de Hele-Shaw, et une analyse dimensionnelle de l’effet du confinement et de la gravité sur les écoulements gaz-liquide dans un milieu poreux est proposée.Références –[1] M. Serres, R. Philippe & V. Vidal, to be submitted to Geophys. Res. Lett. (2017). [2] M. Serres, D. Schweich, R. Philippe & V. Vidal, to be submitted to Chem. Eng. Sci. (2017).[3] M. Serres, R. Philippe & V. Vidal, Compte-rendus de la 19e Rencontre du Non-Linéaire, Eds. E. Falcon, M. Lefranc, F. Pétrélis & C.-T. Pham, Non-Linéaire Publications, 109-114 (2016).[4] M. Serres, M.-L. Zanota, R. Philippe & V. Vidal, Int. J. Multiphase Flow 85, 157-163 (2016).[5] M. Serres, T. Maison, R. Philippe & V. Vidal, to be submitted to Int. J. Multiphase Flow (2017)
This thesis focuses on gas-liquid flow in porous media, a common problem encountered in various domains from fundamental physics to applied chemical engineering. We have characterized the hydrodynamic regimes based on two different experimental devices geometry: a millichannel (1D flow) and a Hele-Shaw cell (2D flow). The originality of this work is to analyze the influence of the porous medium (monodisperse micro-packed beds or open cell solid foams), confinement (1D/2D) and gravity by coupling global and local analysis from either chemical engineering or fundamental physics community. On the one hand, a global analysis made it possible to quantify pressure drops, residence time distributions (RTD) based on fluorescent dye transport and gas-liquid mass transfer on the 1D device. On the other hand, a local analysis of the liquid fraction and the spatio-temporal evolution of its frequency pointed out the existence of two hydrodynamic regimes: a Taylor-like regime in which the characteristics of the periodic flow upstream are conserved in the porous medium and a modulated regime characterized by the flow disorganization at the porous medium entrance. A phenomenological model is developed based on bubbles propagation inside the medium and reproduces well both regimes. These two analyses are finally coupled to study multiphase flows inside the Hele-Shaw cell. The effects of gravity and confinement are discussed

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Barrios, Evelyn. "Hydrodynamique des reacteurs a lit fixe avec ecoulement en co-courant ascendant de gaz et de liquide". Paris 6, 1987. http://www.theses.fr/1987PA066066.

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L'etude experimentale porte sur plusieurs systemes : 4 types de solides (3 supports de catalyseur et des billes de verres, 2 liquides (eau ou cyclohexane) et 2 gaz (air ou azote) ainsi que 2 tailles de colonne (5 ou 15 cm). On suit l'influence de ces parametres sur le regime d'ecoulement, la retenue liquide et gazeuse et sur les pertes de charges

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Książki na temat "Hydrodynamics- Liquid flow"

Yarin, Alexander L. Free liquid jets and films: Hydrodynamics and rheology. Harlow: Longman Scientific & Technical, 1993.

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American Society of Mechanical Engineers. Winter Meeting. Fundamentals of gas-liquid flows. New York: American Society of Mechanical Engineers, 1988.

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akov, V. E. Nakor i. Wave propagation in gas-liquid media. Wyd. 2. Boca Raton: CRC Press, 1993.

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Nakori͡akov, V. E. Wave propagation in gas-liquid media. Redaktorzy Pokusaev B. G, Shreĭber I. R i Bergles A. E. 1935-. Wyd. 2. Boca Raton: CRC Press, 1993.

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Franz-S, Rys, i Gyr Albert, red. Physical processes and chemical reactions in liquid flows. Rotterdam: A.A. Balkema, 1998.

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Computational hydrodynamics of capsules and biological cells. Boca Raton: Chapman & Hall/CRC, 2010.

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Pozrikidis, C. Computational Hydrodynamics of Capsules and Biological Cells. Taylor & Francis Group, 2019.

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Części książek na temat "Hydrodynamics- Liquid flow"

Nordsveen, Magnus, i Arnold F. Bertelsen. "Waves and Secondary Flows in Stratified Gas/Liquid Duct Flow". W Waves and Nonlinear Processes in Hydrodynamics, 279–90. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0253-4_22.

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Spielman, Lloyd A. "Flow Through Porous Media and Fluid-Particle Hydrodynamics". W Mathematical Models and Design Methods in Solid-Liquid Separation, 25–47. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5091-7_3.

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Simakov, Nikolay N. "Mathematical Modeling of Hydrodynamics of an Axisymmetric Two-Phase Flow Produced by a Nozzle". W Liquid Spray from Nozzles, 89–103. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12446-5_4.

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Li, Xiao-long, Ting-an Zhang, Yan Liu, Gui-li Liu i Fang Dong. "Hydrodynamics of Gas–Liquid Two-Phase Flow in the Reverse Spray Washing Process". W Energy Technology 2021, 61–74. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65257-9_7.

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Kumitskiy, Boris, Svetlana Tul’skaya, Viktor Morozov, Egor Aralov i Victor Budnikov. "Hydrodynamics of the Flow of an Ideal Liquid When It Flows Out of the Bottom Hole of a Parabolic Tank". W Lecture Notes in Civil Engineering, 225–32. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-12703-8_22.

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Xu, Jinchao, Xiaodong Wang, Long Zhu, Donghui Zhou i Jun Zhao. "Study on Air Bubble Plume in Open Channel with CFD-PBM Coupling Model". W Lecture Notes in Civil Engineering, 1261–70. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_110.

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AbstractAir bubble plume flow has been applied widely in the dredging, ice breaking, and pollution control at navigation projects. But the interaction regimes among bubbles or between bubbles and water are not quite clear. Especially in open channels, the bubble plume flow are significantly affected by the separation phenomenon which is caused by the cross flow velocity. According to the existing research, the interaction force of gas-liquid and the distribution of bubble size are the key parameters to simulate the hydrodynamic characteristics of bubble plume flow. In order to explore the mechanism of air bubbles entrained plumes in open channels, an Eulerian-Eulerian approach for air-water flows numerical model was introduced, and the population balance model (PBM) was included to describe the distribution of bubble size. The cross flow velocity of open channels has been discussed in the proposed numerical model. It shows that the separation of bubble plume is strongly influenced by the cross flow velocity. The influence of these parameters on the movement characteristics of air bubbles is studied. The results indicate that the cross flow velocity has great impact on bubble plume as well as the lifting effectiveness of pneumatic sluicing. This research provides references for bubble plume in engineering applications.

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Akhatov, I. Sh, i R. G. Chembarisova. "The Thermoconvective Instability in Hydrodynamics of Relaxational Liquids". W Instabilities in Multiphase Flows, 277–87. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1594-8_23.

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Tsaoulidis, Dimitrios A. "Liquid-Liquid Flows in Micro and Small Channels: Hydrodynamics and Pressure Drop". W Studies of Intensified Small-scale Processes for Liquid-Liquid Separations in Spent Nuclear Fuel Reprocessing, 65–91. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-22587-6_4.

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Kalmbach, Thomas, Simon Gramlich i Manfred Piesche. "Movement and Hydrodynamic Instabilities of Particle-Laden Liquid Jets in the Centrifugal Field Influenced by a Gas Flow". W Process-Spray, 171–204. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32370-1_5.

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Abiev, Rufat. "Analysis of Hydrodynamics and Mass Transfer of Gas-Liquid and Liquid-Liquid Taylor Flows in Microchannels". W Process Analysis, Design, and Intensification in Microfluidics and Chemical Engineering, 1–49. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7138-4.ch001.

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Analysis of hydrodynamics and mass transfer Taylor flows in micro channels of both gas-liquid and liquid-liquid systems on the basis of classical theoretical approach with some simplifying assumptions was performed. Results of theoretical analysis for description of hydrodynamic parameters and mass transfer characteristics were confirmed by comparison with the author's own and available in literature experimental data. It was shown that the main parameters of two-phase Taylor flows could be quite precisely described theoretically: mean bubble/droplet velocity, liquid film thickness, real gas holdup (which is always smaller than so-called dynamic holdup), pressure drop. Peculiarities of liquid-liquid flows compared to gas-liquid Taylor flows in capillaries are discussed. Wettability effect on hydrodynamics was examined. Tools of mass transfer intensification of gas-liquid and liquid-liquid Taylor flow in micro channels are analyzed. Three-layer model for heat and mass transfer has been proposed and implemented for the case of solid-liquid mass transfer for gas-liquid Taylor flows; optimal process conditions for this process are found theoretically and discussed from physical point of view.

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Streszczenia konferencji na temat "Hydrodynamics- Liquid flow"

Borisov, I., A. Khalatov i T. Wang. "Hydrodynamics of Rotating Bubble Flow". W ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33832.

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This paper presents a new set of experimental data on the hydrodynamics of rotating bubble flow and is a continuation of previous gas-liquid rotating flow studies. The new data include the surface friction on both end walls of the vortex chamber, and static pressure distributions at the exit of swirl generator slots and on the inner surface of vortex chamber. The corotating disk technique was used to determine the friction momentum measured by the dynamometer. The air-liquid velocity was registered by the blade-anemometer with a light modulator fixed on its axis. The friction coefficient was found based on the conservation of rotational momentum and the assumption of constant air-liquid rotational velocity throughout the two-phase flow field. The ‘jump-like’ reductions in static pressure were registered on the border between the incoming jets and the bubble flow. A new correlation describing linear gas-liquid rotating velocity is given. The static pressure measurements are in reasonable agreement with the data predicted from the theoretical model.

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Khan, Wasim, Abhishek K. Chandra, Kaushal Kishor, Sadhana Sachan i M. Siraj Alam. "Hydrodynamics and simulation studies of liquid-liquid slug flow in micro-capillaries". W 2017 International Conference on Advances in Mechanical, Industrial, Automation and Management Systems (AMIAMS). IEEE, 2017. http://dx.doi.org/10.1109/amiams.2017.8069225.

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Тутанина, Екатерина Михайловна, Антон Викторович Степыкин i Елена Александровна Тарлаковская. "HYDRODYNAMICS OF LIQUID LAMINAR FILM FLOW ALONG MESH PACKING". W Поколение будущего: сборник избранных статей Международной студенческой научной конференции (Санкт-Петербург, Май 2022). Crossref, 2022. http://dx.doi.org/10.37539/pb197.2022.48.34.008.

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В статье приводятся уравнения распределения скорости по поверхности сетчатого элемента, при стекании жидкости в ламинарном режиме. Преобразование формул происходит на основе принятых допущений. Произведён анализ полученных уравнений и даны рекомендации к дальнейшему использованию. The article presents the equations of the velocity distribution over the surface of the mesh element, when the liquid flows in the laminar mode. The transformation of formulas takes place on the basis of accepted assumptions. The obtained equations are analyzed and recommendations for further use are given.

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Dittmar, Ina, i Peter Ehrhard. "On the Liquid/Liquid Slug Flow in a Micro-Capillary Reactor". W ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21800.

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The hydrodynamics within a liquid/liquid slug flow in a micro-capillary reactor is characterized by complex vortex structures, both within the disperse and within the continuous phase. Usually, one of the phases exhibits good wetting of the wall, while the second phase exhibits poor wetting. This is why we expect a (continuous) thin film of the wetting phase along the wall. We compute this complex two-phase flow by means of a finite-volume method (FVM), whereas the interface is captured by a modified level-set method. Hence, from our numerical simulations we obtain the detailed topology of this two-phase flow, the position of the interface, as well as the thickness of the thin wall film of the continuous phase. With regard to the thickness of this wall film in liquid/liquid systems, very little information is available in literature. Of course, the hydrodynamics of this two-phase flow is the basis for any species transport computations within such micro-capillary reactors. We discuss in detail the topology of this two-phase flow, as it develops for various parameters. Moreover, a careful comparison of experimental and theoretical findings on the wall film thickness is presented.

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Gambaryan-Roisman, T., i P. Stephan. "Evaporation of Gravity- and Gas Flow-Driven Thin Liquid Films in Micro- and Minigrooves". W ASME 2004 2nd International Conference on Microchannels and Minichannels. ASMEDC, 2004. http://dx.doi.org/10.1115/icmm2004-2380.

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Using microstructured wall surfaces may improve the heat transfer performance of falling film or shear-driven film cooling devices enormously. The advantages of the structured surface include the prevention of the formation of dry patches on hot surfaces, the promotion of ultra-thin film evaporation, and a wavy motion of the film that enhances mixing of the liquid. We develop a model describing the hydrodynamics and heat transfer by evaporation of gravity- and gas flow-driven liquid films on grooved surfaces. For low Reynolds numbers or low liquid mass fluxes the heat transfer is governed by the evaporation of the ultra-thin film at a micro region, in the vicinity of the three-phase contact line. We investigate the hydrodynamic stability of the film flow using the long-wave theory. In addition to the films completely covering the wall structure, we study the stability characteristics of a thin liquid film partly covering the grooved wall, so that the flow region is bounded by contact lines. Two cases are analyzed: fully wetting liquids and liquids which form a small but finite contact angle with the wall material.

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Oladyshkin, S., i M. Panfilov. "Splitting the Thermodynamlics and Hydrodynamics in Compositional Gas-Liquid Flow through Porous Reservoirs". W ECMOR X - 10th European Conference on the Mathematics of Oil Recovery. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609.201402528.

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Tan, M., P. Temarel, S. H. Miao i Y. B. Lee. "Coupling Between Flexible Ship and Liquid Sloshing Using Potential Flow Analysis and its Effect on Wave-Induced Loads". W William Froude Conference: Advances in Theoretical and Applied Hydrodynamics - Past And Future. RINA, 2010. http://dx.doi.org/10.3940/rina.wfa.2010.08.

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Etminan, Amin, Yuri S. Muzychka i Kevin Pope. "CFD Modelling for Gas-Liquid and Liquid-Liquid Taylor Flows in the Entrance Region of Microchannels". W ASME 2021 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/fedsm2021-64172.

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Abstract This paper presents a CFD-based simulation method for air/water and water/dodecane Taylor flows through an axisymmetric microchannel with a circular cross-sectional area. A systematic analysis is conducted by exploring the effects of different superficial velocities and apparent viscosities on the hydrodynamics of a slug flow regime. A concentric junction is employed to make bubbles of air in a continuous flow of water and slugs of water in a continuous flow of dodecane oil. A time-history study is conducted to predict the air-bubble and water-slug evolution processes, in particular at the moment of slug breakup. The results show that the larger apparent viscosity ratio of phases involved in the liquid-liquid flow generates a more stable interface. However, the liquid slug length is less and film thickness is slightly larger in liquid-liquid compared to gas-liquid flow. Furthermore, variations in gas and liquid holdups are correlated by the superficial velocity ratio. The numerical analysis developed in this paper is in good agreement with the correlations and data in the literature.

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Kurnia, Jundika Candra, Imen ben Salem, Humair Nadeem, Tariq Shamim i Mohamed Sassi. "Numerical Investigation of Multiphase Flow Hydrodynamics in Trickle Bed Reactors". W ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-22152.

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For decades, trickle bed reactors (TBRs) have been widely used in chemical process industries due to their cost effectiveness and simplicity in operation. Despite their wide use, designing efficient TBRs is challenging, considering the complexity of various transport processes and interactions that occur simultaneously in TBRs. Hence, it is of prime importance to have a comprehensive understanding on the multiphase flow inside TBRs. The objective of this study is to investigate hydrodynamic of multiphase flow and to identify the flow regime developed inside TBRs. Multiphase flow inside TBRs is investigated by utilizing the well-established computational fluid dynamics approach and experimental study. A “discrete particle” approach together with Volume of Fluid multiphase flow modeling is utilized in this study. The effect of the bed particle diameter, spacing, and arrangement is examined and evaluated. The results are analyzed with regards to liquid content and pressure drop. The findings will assist in developing guidelines for designing TBRs.

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Gera, Dinesh, Madhava Syamlal i Thomas J. O’Brien. "Hydrodynamics of Multiple Size Particles in a Liquid Fluidized Bed Classifier". W ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45494.

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A two fluid model is extended to an N-phase, multi-fluid model, in which each particulate phase represents a collection of particles with identical diameter and density. The current N-phase model is applied to a fluidized bed classifier with six different particle sizes to investigate the effects of different operating conditions—fluidizing liquid flow rate, feed voidage, and particle size distribution in the feed stream—on the particle size distribution inside the classifier and the discharge streams. The predicted volume fraction of different particle sizes is compared with the experimental data reported by Chen et al. (2002) for two columns, 191 mm and 292 mm in diameter, each having different geometries and containing glass beads of different sizes fluidized with water. A fairly good agreement is observed between the measured and predicted values for mono- and poly-dispersed systems.

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Raporty organizacyjne na temat "Hydrodynamics- Liquid flow"

Liu, D. D. S., D. J. Patmore i J. J. Lipsett. Hydrodynamic behaviour of gas-liquid two-phase flows at elevated temperatures and pressures. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302590.

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