...HTD-Vol. 366-4, Proceedings of t h e ASME Heat Transfer Division 2000 Volume 4 ASME 2000 TWO-PHASE FLOW REGIME TRANSITIONS IN MICROCHANNEL TUBES: THE EFFECT OF HYDRAULIC DIAMETER John W. Coleman and Srinivas Garimelia Department of Mechanical Engineering Iowa State University Ames, IA 50011-2161...

... 07 07 2010 In this paper, a PCM fluid is compared with pure water as heat transfer fluid. The heat transfer behavior of phase change material fluid (PCM) under laminar flow conditions in circular and rectangular microchannels was studied numerically. As part of the numerical study...

... 26 05 2009 For annular liquid-vapor two-phase flow in straight microchannels, effects of gravity are generally small compared to viscous and/or inertia forces. In serpentine evaporator or condenser passages with semicircular return bends, the bend radius may be so small that large...

... 26 05 2009 In this paper the effect of constant external heat transfer on the performance of a two fluid balanced parallel flow microchannel heat exchanger is analyzed. A mathematical model is developed for predicting the effectiveness-NTU relationship of both the fluids. Theoretical...

... 26 05 2009 In this paper the effect of axial heat conduction on the thermal performance of a microchannel heat exchanger with non-adiabatic end walls is studied. The two ends of the wall separating the coolant are assumed to be subjected to boundary condition of the first kind...

...). In microchannels with near-circular cross- sections, when the hydraulic diameter is smaller than some threshold (DH £ 1 mm with air and water like fluids, with DH representing the hydraulic diameter) the buoyancy effect is suppressed by surface tension. With the exception of stratified flow, which does...

... comprises an array of parallel microchannels formed within a polypropylene substrate to carry fluid, with the base of the substrate mounted on an aluminium carrier. Substrate depth is 500 micron, and each channel is 60 micron wide by 40 micron deep. Thermoelectric cells (TECs) are bonded to the carrier...

... 31 03 2008 A new type of microchannel heat sink has been developed and evaluated in this study. The device consists of silicon microchannels on whose bottom surfaces multi-walled carbon nanotubes are grown. The objective of the study is to investigate the effect of carbon nanotubes...

...Lie o n Proceedings of IMECE04 2004 ASME International Mechanical Engineering Congress and Exposition November 13-20, 2004, Anaheim, California USA 1 Copyright © 2004 by ASME substantial does it have an effect on the air flow. KEYWORDS Microchannels, two-phase flow, fuel cells. INTRODUCTION...

... 05 02 2008 Flow boiling heat transfer in a microchannel heat sink is experimentally investigated. The microchannels considered are 275 μm wide and 636 μm deep, and the experiments are conducted at inlet water temperatures in the range of 66 to 95°C and mass fluxes of 341 to 936 kg/m 2...