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Journal articles on the topic 'Phase change dispersion'

Author: Grafiati
Published: 13 July 2023

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1

Fischer, Ludger, Ernesto Mura, Geng Qiao, et al. "HVDC Converter Cooling System with a Phase Change Dispersion." Fluids 6, no. 3 (2021): 117. http://dx.doi.org/10.3390/fluids6030117.

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High voltage direct current converters require efficient cooling of thyristors via heat sinks. Currently, infrastructures use deionised water as a means of cooling the high voltage direct current converters; however, recent research has shown that other fluids have potential to offer more efficient cooling. Phase change dispersions are a new class of heat transfer fluids that employ the latent heat of phase change, thus offering isothermal cooling during melting. For cooling applications, the temperature increase during operation is thus lowered when using phase change dispersions (compared to
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2

Fischer, Ludger, Ernesto Mura, Poppy O’Neill, et al. "Heat Transfer Performance Potential with a High-Temperature Phase Change Dispersion." Energies 14, no. 16 (2021): 4899. http://dx.doi.org/10.3390/en14164899.

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Phase change dispersions are useful for isothermal cooling applications. As a result of the phase changes that occur in PCDs, they are expected to have greater storage capacities than those of single-phase heat transfer fluids. However, for appropriate heat exchanger dimensions and geometries for use in phase change dispersions, knowledge about the convective heat transfer coefficients of phase change dispersions is necessary. A test unit for measuring the local heat transfer coefficients and Nusselt numbers of PCDs was created. The boundary condition of constant heat flux was chosen for testi
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Fischer, Ludger J., Somayajulu Dhulipala, and Kripa K. Varanasi. "Phase Change Dispersion Made by Condensation–Emulsification." ACS Omega 6, no. 50 (2021): 34580–95. http://dx.doi.org/10.1021/acsomega.1c04940.

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4

Andreev, A. A., N. A. Belov, V. V. Makarova, et al. "Dispersion of Polyethylene Glycol in Perfluorodecalin for Liquid Phase Fluorination." Eurasian Chemico-Technological Journal 24, no. 3 (2022): 259–65. http://dx.doi.org/10.18321/ectj1439.

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This work aims to obtain the dispersions based on polyethylene glycols (PEGs) of various molecular masses (MM) and perfluorodecalin (PFD) for subsequent direct fluorination. The solubility of the components was estimated using laser interferometry and differential scanning calorimetry, and it was shown that PEGs with different MM are not highly compatible with PFD. The dispersions were prepared during sonication. Gel permeation chromatography (GPC) analysis indicated that MMs almost did not change in this process. While the sonication of PEG-PFD, there is a formation of dispersion with the par
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Fischer, L. J., S. von Arx, U. Wechsler, S. Züst, and J. Worlitschek. "Phase change dispersion properties, modeling apparent heat capacity." International Journal of Refrigeration 74 (February 2017): 240–53. http://dx.doi.org/10.1016/j.ijrefrig.2016.10.008.

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6

Fasano, Antonio, and Roberto Gianni. "Phase change of a two-component liquid–liquid dispersion." Nonlinear Analysis: Real World Applications 1, no. 4 (2000): 435–48. http://dx.doi.org/10.1016/s0362-546x(99)00103-0.

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7

Wang, Hushan, Huabao Cao, Yishan Wang, Wei Zhao, and Yuxi Fu. "Suppression of Pulse Intensity Dependent Dispersion during Nonlinear Spectral Broadening with Intermediate Compression for Passive CEP Stable Pulse Generation." Photonics 9, no. 10 (2022): 761. http://dx.doi.org/10.3390/photonics9100761.

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The intensity fluctuation induced spectral phase-change of the laser pulse during nonlinear spectral broadening is theoretically investigated. The oscillation of the phase-change curves at the central part of the spectra is explained by the two-wave interference model, while the bending of the phase-change curves at the wings is considered to originate from the intensity dependent dispersion caused by the self-steepening (SST) effect. Both of them can degrade carrier envelop phase (CEP) stability after an intra-pulse difference frequency generation (IP-DFG) setup. We propose an effective appro
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Tanaka, Chigusa, Jianqiang Mai, Masamichi Nakagawa, Shuzo Oshima, Ryuichiro Yamane, and Myeng-Kwan Park. "New Actuator Utilizing Phase Change of Functional Fluids." International Journal of Modern Physics B 13, no. 14n16 (1999): 2183–88. http://dx.doi.org/10.1142/s0217979299002290.

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This paper proposes a new actuator utilizing the phase change of the ER fluid. The dielectric coolant was used for the solvent and silica gel particles for the dispersion particle. The dynamic characteristics of the actuator was determined for the several patterns of the working conditions.
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9

Deng, Y. F., Z. Li, J. H. Peng, C. Liu, and X. S. Miao. "Thermal dispersion and secondary crystallization of phase change memory cells." Applied Physics Letters 103, no. 23 (2013): 233501. http://dx.doi.org/10.1063/1.4831966.

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10

Fischer, Ludger, Simon Maranda, Anastasia Stamatiou, Silvan von Arx, and Jörg Worlitschek. "Experimental investigation on heat transfer with a Phase Change Dispersion." Applied Thermal Engineering 147 (January 2019): 61–73. http://dx.doi.org/10.1016/j.applthermaleng.2018.10.056.

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11

Tan, Felicia, Vincent Tam, and Chris Savvides. "Elevated LNG Vapour Dispersion—Effects of Topography, Obstruction and Phase Change." Eng 2, no. 2 (2021): 249–66. http://dx.doi.org/10.3390/eng2020016.

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The dispersion of vapour of liquefied natural gas (LNG) is generally assumed to be from a liquid spill on the ground in hazard and risk analysis. However, this cold vapour could be discharged at height through cold venting. While there is similarity to the situation where a heavier-than-air gas, e.g., CO2, is discharged through tall vent stacks, LNG vapour is cold and induces phase change of ambient moisture leading to changes in the thermodynamics as the vapour disperses. A recent unplanned cold venting of LNG vapour event due to failure of a pilot, provided valuable data for further analysis
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12

Ikutomo, R., Masato Tsujikawa, Makoto Hino, Hisamichi Kimura, Kunio Yubuta, and Akihisa Inoue. "Fine Crystalline Phase Dispersion in Zr-Based Bulk Metallic Glass by Laser Irradiation." Advanced Materials Research 26-28 (October 2007): 747–50. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.747.

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Bulk metallic glass (BMG) exhibits remarkable properties such as high strength, good stiffness and good corrosion resistance. However, the wear resistance of amorphous metals is not excellent as expected their high strength. It is thought that large local shear bands easily change into cracks for debris formation. The effective obstruction of shear band formation might be applied to improve the wear resistance of BMG. In this study, we tried to suppress shear band deformation by fine crystalline phase dispersion formed by semi-conductor laser irradiation. The microstructures of irradiated Zr-b
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13

Fischer, L. J., S. von Arx, U. Wechsler, S. Züst, and J. Worlitschek. "Phase change dispersion, potentially a new class of heat transfer fluids." Journal of Physics: Conference Series 745 (September 2016): 032133. http://dx.doi.org/10.1088/1742-6596/745/3/032133.

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14

Chavez, C. T., A. Egly, I. Sepulveda, and F. J. Wessel. "Measurement of 2D density profiles using a second-harmonic, dispersion interferometer." Review of Scientific Instruments 94, no. 2 (2023): 023503. http://dx.doi.org/10.1063/5.0119896.

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A second-harmonic, dispersion interferometer is used to image large-area (≃5 cm2) plasma-jet and gas-jet density profiles. Achromatic telescopes magnify the diameters of the primary-laser beam (1064 nm) and its second-harmonic (532 nm) before probing the sample and de-magnify the beam diameters after the sample, where the primary beam transfers its phase change to a second, second-harmonic beam, allowing the sample’s dispersive-phase change to be measured between two, orthogonally polarized second harmonic beams. The telescopes produce an azimuthally symmetric, dispersive-phase shift in the sa
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15

Ptáček, Jan, Vladimír Rod, and Vladislav Hančil. "Mass transfer accompanied by chemical reaction in a liquid dispersion." Collection of Czechoslovak Chemical Communications 50, no. 8 (1985): 1685–98. http://dx.doi.org/10.1135/cccc19851685.

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An experimental procedure has been worked out to measure mass transfer rates in the presence of a chemical reaction in a liquid dispersion in a batch mixed vessel by a dynamic method. Transfer rates have been observed of iodine between decalin and water phase containing potassium iodide. The transfer was described by the pseudohomogeneous model. Transport parameters of this model have been evaluated from the response of the system to a step concentration change in the continuous phase. The model of the experiment described distortion of the information in the sampling device for the continuous
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16

Begand, Sabine, Thomas Oberbach, Mathias Herrmann, and Kerstin Sempf. "Surface Properties after Ageing of Dispersion Ceramic and its Influence on Strength." Key Engineering Materials 396-398 (October 2008): 157–60. http://dx.doi.org/10.4028/www.scientific.net/kem.396-398.157.

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The primary purpose of this work was the examination of the surface and the strength of ATZ ceramic after hydrothermal treatment. Hydrothermal treatment of ATZ ceramic leads to changes of roughness and phase composition on the surface. The phase composition and the microstructure on the surface and within the peripheral zone were determined after applying a stepwise broad ion beam polishing technique and quantitative phase analysis. With this technique a penetration depth of the phase transformation of less than 14 µm was observed. Investigations of the cross sectional area by means of FESEM h
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17

Song, Yimin, Deshun Yuan, Junhui Zhang, Hailiang Xu, Dong An, and He Ren. "Study on the Stage Characteristics of Noise Dispersion in the Deformation Evolution of Red Sandstone." Mathematical Problems in Engineering 2022 (December 26, 2022): 1–20. http://dx.doi.org/10.1155/2022/2149273.

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The uniaxial compression experiment of red sandstone is observed simultaneously by using acoustic emission and digital speckle correlation methods. The deformation evolution of red sandstone is divided into microfracture random expansion stage, deformation localization stage, subinstability stage, and instability failure stage. Green’s function and dispersion curve of each stage are obtained from the noise data picked up by acoustic emission equipment, and the dispersion characteristics of each evolution stage are analyzed. The results show the following: (1) In the stage of random propagation
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18

Yang, Luxi, Linchuan Dai, Lu Ye, Rui Yang, and Yangcheng Lu. "Microfluidic Fabrication and Thermal Properties of Microencapsulated N-Hexadecane with a Hybrid Polymer Shell for Thermal Energy Storage." Materials 15, no. 10 (2022): 3708. http://dx.doi.org/10.3390/ma15103708.

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In this study, a strategy based on microfluidic method is developed toward a facile fabrication of phase change material microcapsules with uniform and controllable particle size as well as high encapsulation ratio and thermal stability. N-hexadecane, as a phase change material, was successfully encapsulated by a hybrid shell of poly (methyl methacrylate) and polyurea. The fabrication process includes the following three steps: (1) Formation of oil-in-water droplets with uniform micron size in the microfluidic chip; (2) formation of the first polyurea shell to encapsulate droplets by fast inte
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19

Zhang, Jingjing, Qiuli Huang, Chungui Du, et al. "Preparation and Anti-Mold Properties of Nano-ZnO/Poly(N-isopropylacrylamide) Composite Hydrogels." Molecules 25, no. 18 (2020): 4135. http://dx.doi.org/10.3390/molecules25184135.

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The aim of this study was to overcome drawbacks of the inhomogeneous dispersion and facile agglomeration of nano-ZnO/poly(N-isopropylacrylamide) composite hydrogels (nano-ZnO/PNIPAm composite hydrogels) during synthesis and improve the anti-mold property of the nano-ZnO/PNIPAm composite hydrogels. Here, nano-ZnO/PNIPAm composite hydrogels were prepared by the radical polymerization method. Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), differential scanning calorimeter (DSC), and dynamic light scattering (DLS) were used to characterize the effects of di
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20

Fischer, Ludger, Ernesto Mura, Poppy O'Neill, et al. "Thermophysical properties of a phase change dispersion for cooling around 50 °c." International Journal of Refrigeration 119 (November 2020): 410–19. http://dx.doi.org/10.1016/j.ijrefrig.2020.05.013.

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21

Paul, John, Mahendran Samykano, Adarsh Kumar Pandey, Kumaran Kadirgama, and Vineeth Veer Tyagi. "Nano Engineered Paraffin-Based Phase Change Material for Building Thermal Management." Buildings 13, no. 4 (2023): 900. http://dx.doi.org/10.3390/buildings13040900.

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Thermal energy storage (TES) and harvesting is an effective technique for optimum building thermal management. Phase-change materials (PCMs) are commonly used for TES applications but are troubled by their degraded thermal conductivity. Recent research progress in latent heat energy storage using PCMs and nano additives provides a viable solution for solar TES. A series of hybrid nano-enhanced phase change materials (HNePCMs) were prepared via two-step synthesis. Hybrid graphene–silver nanofillers were dispersed in commercial paraffin (melting point 25 °C) under different dispersion rates (0.1
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22

Njeh, A., D. Schneider, H. Fuess, and M. H. Ben Ghozlen. "Surface Wave Propagation in Thin Silver Films under Residual Stress." Zeitschrift für Naturforschung A 57, no. 1-2 (2002): 58–64. http://dx.doi.org/10.1515/zna-2002-1-208.

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Investigations using surface acoustic waves provide information on the elastic properties of thin films. Residual stresses change the phase velocity of the surface waves. We have calculated the phase velocity and dispersion of surface waves in thin silver films with a strong [111]-fibre texture. A non-linear description of surface waves propagating along the [110]-direction of the substrate has been developed on the basis of an acoustoelastic theory, taking into account residual stresses. The relative change Δc/c of the velocity v was found to be linear for large excitation frequencies. The di
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23

Njeh, A., T. Wieder, D. Schneider, H. Fuess, and M. H. Ben Ghozlen. "Surface Wave Propagation in Thin Silver Films under Residual Stress." Zeitschrift für Naturforschung A 57, no. 9-10 (2002): 58–64. http://dx.doi.org/10.1515/zna-2002-9-1008.

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Investigations using surface acoustic waves provide information on the elastic properties of thin films. Residual stresses change the phase velocity of the surface waves. We have calculated the phase velocity and dispersion of surface waves in thin silver films with a strong [111]-fibre texture. A non-linear description of surface waves propagating along the [110]-direction of the substrate has been developed on the basis of an acoustoelastic theory, taking into account residual stresses. The relative change Δv/v of the velocity v was found to be linear for large excitation frequencies. The di
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24

Aksenov, D. A., S. N. Faizova, and I. A. Faizov. "Hardening mechanisms contribution at nonmonotonic change of properties in the Cu–0.6Cr–0.1Zr alloy at high pressure torsion." Frontier materials & technologies, no. 3 (2022): 23–32. http://dx.doi.org/10.18323/2782-4039-2022-3-1-23-32.

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Phase transformations play an important role in the formation of properties in the dispersion-hardened alloys, for example, such as the Cu–Cr–Zr system alloys. It is known that under severe plastic deformation, the diffusion conditions change significantly, which leads to a change in the phase transformation kinetics. In this work, the authors studied the Cu–0.6Cr–0.1Zr alloy in the low concentration solid solution state subjected to high pressure torsion (up to 10 cycles). In this case, due to the solid solution low concentration and the formed ensemble of large particles, the process of soli
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25

Andiarto, Rizky, Muhammad Khalish Nuryadin, and Rosari Saleh. "Structural and Thermal Properties Investigation of Stearic Acid Dispersed Fe3O4/TiO2 Nanocomposites for Thermal Energy Storage." Materials Science Forum 864 (August 2016): 180–85. http://dx.doi.org/10.4028/www.scientific.net/msf.864.180.

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In this paper, a series of magnetic Stearic acid (Sa)/Fe3O4/TiO2 nanocomposites were synthesized as a functional phase change materials through a two step methods; sol gel method followed by dispersion technique. Fe3O4/TiO2 nanocomposites were first synthesized by varying the molar ratio of Fe3O4:TiO2 from 1:1 to 1:5 followed by dispersing the synthesized Fe3O4/TiO2 nanocomposites in stearic acid (Sa). The structural properties were confirmed by X-ray diffractometer (XRD), while their chemical compositions were determined from energy dispersive X-ray (EDX). The molecular interaction were detec
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Krishnamoorthy, Venkateskumar, Suchandrasen, and Verma Priya Ranjan Prasad. "Physicochemical characterization and in vitro dissolution behavior of olanzapine-mannitol solid dispersions." Brazilian Journal of Pharmaceutical Sciences 48, no. 2 (2012): 243–55. http://dx.doi.org/10.1590/s1984-82502012000200008.

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The objective of the present work is to study the dissolution behavior of olanzapine from its solid dispersions with mannitol. Solid dispersions were prepared by melt dispersion method and characterized by phase solubility studies, drug content and in vitro dissolution studies. The best releasing dispersions were selected from release data, dissolution parameters and their release profiles. Solid state characterization techniques like Fourier transform infrared (FT-IR) spectroscopy, X-ray diffractometry, differential scanning calorimetry, near-infrared and Raman spectroscopy were used to chara
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Velupula, Teja, Gayathri Devi Amboru, Sneha Chowdary Gundapaneni, et al. "Bioavailability Enhancement of Ritonavir by Solid Dispersion Technique." Journal of Drug Delivery and Therapeutics 11, no. 5 (2021): 52–56. http://dx.doi.org/10.22270/jddt.v11i5.4983.

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Ritonavir is an antiretroviral agent used in the treatment of HIV-infection. It is a BCS class IV drug having poor aqueous solubility leading to poor bioavailability. Bioavailability is the amount of drug that enters the systemic circulation. The bioavailability is affected by various factors like solubility, dissolution and stability. In order to improve bioavailability, many techniques like solid dispersions, nanoparticles, liposomes, encapsulation methods were present. The main aim of this study is to improve the bioavailability of ritonavir with the help of Polyvinyl Pyrrolidone (PVP) K-30
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28

Tao, Wen, Xiangfa Kong, Anyang Bao, Chuangang Fan, and Yi Zhang. "Preparation and Phase Change Performance of Graphene Oxide and Silica Composite Na2SO4·10H2O Phase Change Materials (PCMs) as Thermal Energy Storage Materials." Materials 13, no. 22 (2020): 5186. http://dx.doi.org/10.3390/ma13225186.

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In this study, a novel nucleating agent composed of graphene oxide (GO) and silicon dioxide (SiO2) (GO–SiO2) is developed. GO is used as a skeleton material through which SiO2 nanomaterials are absorbed and subsequently incorporated into Na2SO4·10H2O phase change materials (PCMs). Furthermore, this study examines the phase change performance of the composite Na2SO4·10H2O materials. Fourier-transform infrared (FTIR) spectra confirmed the physical combination of GO with a SiO2 nanoparticles. Scanning electron microscope (SEM) results showed that the GO–SiO2 composite exhibited a layered structur
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29

Sebti, Seyed, Mohammad Mastiani, Sina Kashani, Hooshyar Mirzaei, and Ahmad Sohrabi. "Numerical study of melting in an annulur enclosure filled with nano-enhanced phase change material." Thermal Science 19, no. 3 (2015): 1067–76. http://dx.doi.org/10.2298/tsci120720022s.

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Heat transfer enhancement during melting in a two-dimensional cylindrical annulus through dispersion of nanoparticle is investigated numerically. Paraffin-based nanofluid containing various volume fractions of Cu is applied. The governing equations are solved on a non-uniform O type mesh using a pressure-based finite volume method with an enthalpy porosity technique to trace the solid and liquid interface. The effects of nanoparticle dispersion into pure fluid as well as the influences of some significant parameters, namely, nanoparticle volume fraction and natural convection on the fluid flow
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30

Pakhomov, M. A. "Numerical modeling of the influence of bubbles on flow and heat transfer in the descending gas-liquid flow in a pipe." Proceedings of the Mavlyutov Institute of Mechanics 9, no. 1 (2012): 131–35. http://dx.doi.org/10.21662/uim2012.1.025.

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The paper presents the results of modeling the dynamics of flow, friction and heat transfer in a descending gas-liquid flow in the pipe. The mathematical model is based on the use of the Eulerian description for both phases. The effect of a change in the degree of dispersion of the gas phase at the input, flow rate, initial liquid temperature and its friction and heat transfer rate in a two-phase flow. Addition of the gas phase causes an increase in heat transfer and friction on the wall, and these effects become more noticeable with increasing gas content and bubble diameter.
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31

Wang, H. Y., V. G. McDonell, and S. Samuelsen. "Influence of Hardware Design on the Flow Field Structures and the Patterns of Droplet Dispersion: Part I—Mean Quantities." Journal of Engineering for Gas Turbines and Power 117, no. 2 (1995): 282–89. http://dx.doi.org/10.1115/1.2814092.

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In a gas turbine engine combustor, performance is likely tied to the spatial distribution of the fuel injected into the dome. The GE/SNECMA CFM56 combustor swirl cup is one example of a design established to provide a uniform presentation of droplets to the dome. The present study is part of a series to detail the dispersion of droplets in practical hardware, and to assess the effect of isolated parameters on the continuous- and dispersed-phase distributions. In this study, the influence of the swirling air outlet geometry is evaluated relative to the effect on the flow field structures and th
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32

Tian, Ximin, Junwei Xu, Ting-Hui Xiao, et al. "Broadband Generation of Polarization-Immune Cloaking via a Hybrid Phase-Change Metasurface." Photonics 9, no. 3 (2022): 156. http://dx.doi.org/10.3390/photonics9030156.

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Metasurface-enabled cloaking offers an alternative platform to render scatterers of arbitrary shapes indiscernible. However, specific propagation phases generated by the constituent elements for cloaking are usually valid for a single or few states of polarization (SOP), imposing serious restrictions on their applications in broadband and spin-states manipulation. Moreover, the functionality of a conventional metasurface cloak is locked once fabricated due to the absence of active elements. Here, we propose a hybrid phase-change metasurface carpet cloak consisting of coupled phase-shift elemen
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33

Zhang, Xiaobin, Jingfeng Li, Jiakai Zhu, and Limin Qiu. "Computational fluid dynamics study on liquefied natural gas dispersion with phase change of water." International Journal of Heat and Mass Transfer 91 (December 2015): 347–54. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.07.117.

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Ye, Xue, Hongshuai Cao, Fugang Qi, et al. "Effect of Y Addition on the Microstructure and Mechanical Properties of ZM31 Alloy." Materials 13, no. 3 (2020): 583. http://dx.doi.org/10.3390/ma13030583.

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Effects of different Y contents (0, 0.3, 0.7, 1.5, 3, 5 and 10 wt.%) on the microstructure, thermal stability and mechanical properties of Mg-3Zn-1Mn (ZM31) alloys were systematically studied. The existence form and action mechanism of Y in the experimental alloys were investigated. The results revealed that with the change of Y content, the main phases of the ZM31-xY alloys changed from Mg7Zn3 phase, I-phase, I + W-phase, W-phase, W + LPSO phase to LPSO phase. When Y content was low (≤1.5%), hot extrusion could break up the residual phases after homogenization to form dispersed fine rare-eart
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35

Guo, Cha Xiu, and Ya Hui Wang. "Numerical Investigation of Nanoparticle-Enhanced High Temperature Phase Change Material for Solar Energy Storage." Advanced Materials Research 512-515 (May 2012): 961–64. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.961.

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In order to store the solar energy efficiently, high temperature phase change material (HTPCM) through dispersion of nanoparticles is reported. Based on the enthalpy-porosity approach, the numerical model is first validated by comparing the results of the reference. Then the melting processes of HTPCM with different mass fraction nanoparticles in an enclosure are conducted. Results show that nanoparticles can greatly increase melting rate, compared with that of HTPCM, so nanoparticle-enhanced phase high temperature change material (NEHTPCM) has a promising application for solar energy storage.
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36

Piątkowski, Jarosław, and Robert Wieszała. "Crystallization and Structure of AlSi10Mg0.5Mn0.5 Alloy with Dispersion Strengthening with Al–FexAly–SiC Phases." Metals 9, no. 8 (2019): 865. http://dx.doi.org/10.3390/met9080865.

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The paper characterizes a composite with dispersion phases cast via the use of stir casting method on an aluminum matrix. A mixture of aluminum with FexAly and SiC powders was achieved in the process of mechanical alloying and self-propagating high temperature synthesis (ASHS). Chemical composition of agglomerates was chosen in such a way that the strengthening components made up 25% of the mass of the AlSi10Mg0.5Mn0.6 (EN AC-43400) alloy matrix. The characteristic temperatures of crystallization of the tested alloy were measured by thermal analysis ATD (analysis thermal derivative). A change
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37

Murayama, M., L. Reich та K. Hono. "Clustering and Segregation of Ag and Mg Atoms in the Nucleation and Growth Stage of Ω And T1 Precipitates In Al-Cu(-Li) Alloys". Microscopy and Microanalysis 4, S2 (1998): 116–17. http://dx.doi.org/10.1017/s1431927600020705.

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Trace additions of Ag and Mg in Al-Cu and Al-Li-Cu alloys change the precipitation processes drastically. In Al-Cu-Mg-Ag alloy, plate-like Ω phase precipitates on the {111} matrix planes. Similarly, additions of Ag and Mg to Al-Li-Cu alloy cause uniform dispersion of the T1 precipitate on the {111} matrix planes. Ω and T1 phases are structurally and morphologically similar, and a similar mechanism is expected to work in both alloy systems to enhance uniform dispersion of the plate-like precipitates on the {111} planes. A previous atom probe work [1] reported that Ag and Mg are segregated at th
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38

Zimmermann, Charlotte, Taija L. Fischer, and Martin A. Suhm. "Pinacolone-Alcohol Gas-Phase Solvation Balances as Experimental Dispersion Benchmarks." Molecules 25, no. 21 (2020): 5095. http://dx.doi.org/10.3390/molecules25215095.

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The influence of distant London dispersion forces on the docking preference of alcohols of different size between the two lone electron pairs of the carbonyl group in pinacolone was explored by infrared spectroscopy of the OH stretching fundamental in supersonic jet expansions of 1:1 solvate complexes. Experimentally, no pronounced tendency of the alcohol to switch from the methyl to the bulkier tert-butyl side with increasing size was found. In all cases, methyl docking dominates by at least a factor of two, whereas DFT-optimized structures suggest a very close balance for the larger alcohols
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Lei, Xun, Zenghui Gu, Jianbin Ma, Guanshi Qin, Zhanguo Chen, and Shaowu Chen. "Investigation of the local dispersion change in anomalous dispersion microcavity and quantitative analysis of the phase-matching in Kerr comb generation." Applied Optics 56, no. 16 (2017): 4828. http://dx.doi.org/10.1364/ao.56.004828.

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40

Aftandiliants, Ye G. "Modelling of structure forming in structural steels." Naukovij žurnal «Tehnìka ta energetika» 11, no. 4 (2020): 13–22. http://dx.doi.org/10.31548/machenergy2020.04.013.

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The study showed that the influence of alloying elements on the secondary structure formation of the steels containing from 0.19 to 0.37 wt. % carbon; 0.82-1.82 silicon; 0.63-3.03 manganese; 1.01-3.09 chromium; 0.005-0.031 nitrogen; up to 0.25 wt.% vanadium and austenite grain size is determined by their change in the content of vanadium nitride phase in austenite, its alloying and overheating above tac3, and the dispersion of ferrite-pearlite, martensitic and bainitic structures is determined by austenite grain size and thermal kinetic parameters of phase transformations. Analytical dependenc
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Dalgetty, Laura, and Malcolm W. Kennedy. "Building a home from foam—túngara frog foam nest architecture and three-phase construction process." Biology Letters 6, no. 3 (2010): 293–96. http://dx.doi.org/10.1098/rsbl.2009.0934.

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Frogs that build foam nests floating on water face the problems of over-dispersion of the secretions used and eggs being dangerously exposed at the foam : air interface. Nest construction behaviour of túngara frogs, Engystomops pustulosus , has features that may circumvent these problems. Pairs build nests in periodic bursts of foam production and egg deposition, three discrete phases being discernible. The first is characterized by a bubble raft without egg deposition and an approximately linear increase in duration of mixing events with time. This phase may reduce initial over-dispersion of
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42

Lv, Xifeng, Xuehua Shen, Luxiang Zhang, Yazhou Wang, and Fang Wang. "Preparation of Organic-Inorganic Coupling Phase Change Materials with Enhanced Thermal Storage Performance via Emulsion Polymerization." Materials 15, no. 9 (2022): 3373. http://dx.doi.org/10.3390/ma15093373.

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The serious phase separation in inorganic phase change materials, and easy leakage of organic phase change materials are the main obstacles to the practical batch application of phase change heat storage materials. To solve these problems, in this work, emulsion polymerization is introduced as the method for preparing organic-inorganic coupling phase change material (oic-PCM) with high heat storage performance using polyacrylamide (PAM) as the wall material and organic phase change material of cetyl alcohol as the core material, and diatomite is used as a supporting substrate to absorb inorgan
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Zhang, Yu, and Shengnian Tie. "Preparation and Rheological Properties of Amide-based Multiwalled Carbon Nanotube Mirabilite Phase Change Materials." Scientific and Social Research 3, no. 2 (2021): 86–91. http://dx.doi.org/10.36922/ssr.v3i2.1109.

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The multi-walled carbon nanotubes (MWCNTs) are modified by redox methods, and the surface groups of the MWCNTs are analyzed by infrared spectroscopy. And the modified MWCNTs were added to the mirabilite-based phase change materials (PCMs) at 40°C to prepare the mirabilite-based phase change composite material. The results show that when the volume fraction is 0.05% and 0.25%, when the temperature rises from 30°C to 50°C, the viscosity drop of the phase change composite material is 35.86% and 37.50%, respectively. That is, the larger the volume of the fraction of nanoparticles, the higher the v
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44

Shutyi A. M., Sementsov D. I., and Eliseeva S. V. "Mode bistability of plasmons and dispersive jump in a structure with two graphene layers." Physics of the Solid State 64, no. 6 (2022): 726. http://dx.doi.org/10.21883/pss.2022.06.53839.259.

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Plasmon modes in a symmetric structure consisting of two layers of inverted graphene separated by a dielectric barrier layer and their dispersion properties are studied for various parameters of the barrier layer. The occurrence of a bifurcation of the splitting of the branch of the dispersion dependence, which leads to the appearance of bistability and a dispersion jump with a change in the stability of the branches included in the bistability, is found. The plasmonic modes belonging to the two branches of the bistable state differ in the gain increment and phase velocity, and their group vel
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Шутый, А. М., Д. И. Семенцов та С. В. Елисеева. "Модовая бистабильность плазмонов и дисперсионный скачок в структуре с двумя графеновыми слоями". Физика твердого тела 64, № 6 (2022): 724. http://dx.doi.org/10.21883/ftt.2022.06.52407.259.

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Plasmon modes in a symmetric structure consisting of two layers of inverted graphene separated by a dielectric barrier layer and their dispersion properties are studied for various parameters of the barrier layer. The occurrence of a bifurcation of the splitting of the branch of the dispersion dependence, which leads to the appearance of bistability and a dispersion jump with a change in the stability of the branches included in the bistability, is found. The plasmonic modes belonging to the two branches of the bistable state differ in the gain increment and phase velocity, and their group vel
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46

Yang, Chunying, and Wenchuang Wang. "Azimuthal multiple signal classification of dispersive and aliased surface waves recorded in 3D seismic acquisition." GEOPHYSICS 87, no. 2 (2022): V87—V100. http://dx.doi.org/10.1190/geo2020-0417.1.

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Irregular acquisition geometry causes discontinuities in the appearance of surface wave events, and a large offset causes seismic records to appear as aliased surface waves. The conventional method of sampling data affects the accuracy of the dispersion spectrum and reduces the resolution of surface waves. At the same time, “mode kissing” of the low-velocity layer and inhomogeneous scatterers requires a high-resolution method for calculating surface wave dispersion. This study tests the use of the multiple signal classification (MUSIC) algorithm in 3D multichannel and aliased wavefield separat
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Wilson, John, Abhishek Singh, Abhinay Singh, and Subramanian Ganapathy. "Waste heat recovery from diesel engine using custom designed heat exchanger and thermal storage system with nanoenhanced phase change material." Thermal Science 21, no. 1 Part B (2017): 715–27. http://dx.doi.org/10.2298/tsci160426264w.

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In this research study an attempt has been made to recover the heat energy of the exhaust gas from a Diesel engine, using a triangular finned shell and tube heat exchanger with segmental baffle at 20?, and efficiently store as sensible and latent heat energy using thermal storage tank having phase change material with CuO nanoparticles. The nanoparticles and the phase change material form the nanoparticle-enhanced phase change material and mainly the thermal conductivity of the phase change material can be enhanced through the dispersion of the nanoparticles. The temperature variations of the
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Radha, Ramaswamy, and Vaduganathan Ramesh Kumar. "Interplay Between Dispersion and Nonlinearity in Femtosecond Soliton Management." Zeitschrift für Naturforschung A 65, no. 6-7 (2010): 549–54. http://dx.doi.org/10.1515/zna-2010-6-710.

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In this paper, we investigate the inhomogeneous higher-order nonlinear Schr¨odinger (NLS) equation governing the femtosecond optical pulse propagation in inhomogeneous fibers using gauge transformation and generate bright soliton solutions from the associated linear eigenvalue problem. We observe that the amplitude of the bright solitons depends on the group velocity dispersion (GVD) and the self-phase modulation (SPM) while its velocity is dictated by the third-order dispersion (TOD) and GVD. We have shown how the interplay between GVD, SPM, and TOD can be profitably exploited to change solit
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Wang, Bo, Xijin Luo, Qinghong Sheng, and Zhijun Yan. "The Effect of Martian Ionospheric Dispersion on SAR Imaging." Space: Science & Technology 2022 (July 26, 2022): 1–13. http://dx.doi.org/10.34133/2022/9860932.

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When passing through the ionosphere, the high-frequency (HF) pulse signal of the Mars Exploration Radar is affected by the dispersion effect error, which results in signal attenuation and time delay and brings about a phase advance in such a way that the echo cannot be matched and filtered. In this paper, a high-order phase model is built to overcome the above problems and enable echo matching and filtering. Most studies on the dispersion effect approximate the additional phase after the effect, assuming that the ionosphere is a thin-layer structure. In this paper, an effective model for the H
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Niu, Xiaofeng, Ruifeng Xia, Honglin Dong, et al. "Dispersion stability and thermophysical properties of microencapsulated phase change material slurry for liquid desiccant dehumidification." Energy and Buildings 240 (June 2021): 110870. http://dx.doi.org/10.1016/j.enbuild.2021.110870.

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