Comparative Analysis Of Single Phase Microchannel For Heat Flow Experimental And Using CFD

Abstract

The emergence of close-packed energy-intensive elements of systems for many subject purposes necessitated their effective cooling in order to stabilize the temperature regime, providing the specified performance features. The solution to this difficult is based on the use of several methods of intensification heat transfer, but porous media have found the greatest application due to increase value of the heat transfer coefficient. The role of this method of intensification increases significantly when high-intensity heat fluxes are removed from compact heat-stressed surfaces, for example in electronic miniature devices in which electromagnetic energy dissipates into heat. The physical model of the currently recognized porous medium, which are commonly described as thick random sphere packaging, intertwined emptiness and completely refrigerated. The porosity of such layers is 0.2-0.4, and the application of factor intensification in the form of a rise in local speed inside the matrix results in considerable hydraulic losses in the pumped heat-sensitive atmosphere of liquid. Instead of high-pressure losses due to high porosity, thus retaining values of the local heat transfer
coefficients, the usage of micro-channel heat exchange elements with a normal porous structure. The emergence of the possibility of growing homogeneous in structure and the geometry of silicon whiskers on a substrate has opened up new prospects in the use of
microchannel elements for solving heat removal of high-intensity flows with compact surfaces. However, questions related to verification there are no hydrothermal characteristics of such media in the scientific literature, which does not allow you to go to the stage of creating specific heat exchange elements based on these environments. The purpose of the study is to establish the regularities of convective heat transfer in microchannel media with a regular matrix structure from of silicon whiskers based on
theoretical and CFD simulation and substantiation of intensification methods heat transfer during heat removal from compact surfaces.