... meniscus capillary pressure phase change screen wicks ansys fluent multiphase CFD VOF model electronics cooling heat pipes thermosyphons evaporation-driven flow heat and mass transfer Heat pipes, vapor chambers, thermosyphons, and other two-phase thermal management devices are widely...

... of water vapor condensation phenomena were experimentally studied on a vertically aligned smooth copper substrate for a range of pressures and temperatures for two different liquid wettability conditions. The heat transfer performance is dominated by the phase change process at the solid–vapor interface...

... small bubbles essentially occurs in heat transfer regime. e-mail:  swapanparuya@gmail.com 18 01 2019 02 10 2019 13 01 2020 bubble collapse interfacial heat transfer numerical analysis phase change nonlinear dynamics Insight of growth and collapse history...

...), the method used here exploits a direct nonlinear numerical model associated with a parameter estimation technique to determine temperature dependent thermal conductivities. It has been applied to a water-agar gel during phase change and the thermal conductivities within the corresponding temperature interval...

.... The numerical model is based on the one-fluid mixture approach combined with the single-domain enthalpy porosity model for phase change, and it is implemented in fluent software package. The linear dependence of the liquidus and solidus temperatures with the concentration of the nanoparticles was assumed...

... semiconductors. These characteristics make it an ideal material for fabricating micro/mini heat pipes and their wick structures. In this article, silicon wick structures, composed of cylindrical pillars 320  μ m in height and 30–100  μ m in diameter, are developed for studies of phase change capability...

... that favors the larger of h ¯ 1 φ and h ¯ 2 φ , while blending the two when their values are close in magnitude. Here, the asymptotic matching parameter, z , was set to 5. This was determined empirically to best match the phase change transition of the experimental...

... ns. The second stage of the process is slower and lasts between 100 and 200 ns. The rapid hole opening process at high fluences can be attributed to recoil pressure from explosive phase change. Measurements of the transient shock wave position using the imaging apparatus in shadowgraph mode are used...

.... Photographs showing the appearance of Marangoni condensation on the tube surface under different conditions are included in the paper. Marangoni condensation steam-ethanol mixture heat transfer mass transfer phase change heat-transfer enhancement Condensation of vapor mixtures has been...

...Liwu Fan; J. M. Khodadadi Highly-conductive nanostructures may be dispersed into phase change materials (PCM) to improve their effective thermal conductivity, thus leading to colloidal systems that are referred to as nanostructure-enhanced PCM (NePCM). Results of a theoretical and experimental...

... agreement between the two curves confirms that the total heat transfer withdrawn from the substrate is used for heat transfer associated with phase transformation. The phase-change enthalpy is not taken from the surrounding air. The heat flux withdrawn is thus the product of the phase-change enthalpy...

... dominated models. The results emphasize that natural convection has a critical effect in actual phase change processes. Latent heat thermal energy storage (LHTES) systems are widely used for shifting cooling load from day-time to night-time, due to the well-known advantages as: increasing system...

... , Liquid-Vapor Phase-Change Phenomena , 2nd ed. , Taylor & Francis , London . 48 Chow , L. C. , Sehmbey , M. S. , and Pais , M. R. , 1997 , “ High Heat Flux Spray Cooling ,” Adv. Heat Transfer , 8 , pp. 291 – 318 . 20 10 2010 12 04 2011 15 08 2011 15...

... 2010 20 09 2010 20 09 2010 boiling bubbles flow visualisation heat transfer liquid films microchannel flow organic compounds two-phase flow viscosity water microlayer microchannel phase change laser extinction method Boiling in mini-/microscale channels...

... a solid wall reveals that the presence of the solid wall induces a change in the phase change heat transport by the working fluid, besides facilitating axial heat conduction in the solid wall. The analysis also highlights the effects of the thickness and thermal conductivity of the solid wall on its axial...

... surfaces with enhanced boiling heat transfer performance and novel phase-change based micro-actuators and energy harvesters. 28 09 2007 28 03 2008 15 10 2009 bubbles cavitation flow simulation hydrophobicity wetting single bubble hydrophobic surface nucleate boiling...

...Ali Siahpush; James O’Brien; John Crepeau A detailed experimental and analytical study has been performed to evaluate how copper porous foam (CPF) enhances the heat transfer performance in a cylindrical solid/liquid phase change thermal energy storage system. The CPF used in this study had a 95...

... transfer latent heat mass transfer membranes microfluidics micromechanical devices polymers supports microtruss architecture latent heat transfer mass transfer pore diffusion MEMS nanotechnology membrane polymers soft materials evaporation nonboiling evaporative cooling phase...

... and subcooled water flowing in opposite directions. The transport equations for the two fluids are alternately solved in separate domains and then coupled at the interface by imposing mass, momentum, and energy jump conditions with phase change. The effects induced by changes in the interfacial shear were...

..., the liquid saturation distribution in Fig. 8 denotes that a vapor generating region, i.e., the two-phase region, becomes smaller both in the radial and axial directions with increasing inlet flow velocity, which means that the phase change is also suppressed. At this time, the minimum value of liquid...