Analysis of heat transfer in microchannel heat sinks using extended navier stokes equations and optimization techniques

Abstract

The rapid advancement in engineering and technology has prompted the electronic industries to develop small scaled devices and thus Micro Electro Mechanical Systems (MEMS) have become one of the major advances in industrial technologies. Due to its micro sizes, these devises are subjected to high heat generation in them, which endangers its performance. This disastrous situation led to the development of Micro Channel Heat Sinks to eradicate the heat dissipation in MEMS. These heat sinks are efficient devices, designed and developed to upgrade the thermal management in MEMS. At present, the exceptional innovation demands for more efficient heat sinks with high heat transfer rate. Thus the current research focuses on the development of advanced methodologies and techniques to effectively study the characteristics and performance of microchannel heat sinks. Heat sinks are designed such that, fluids are mde to flow through micro sized channels, which are placed above the substrate from which heat is generated. Though various kinds of fluids are preferred for achieving higher heat dissipation rate, most of the portable electronic devices adapt heat sinks with gas flows, and hence there arises a necessity to analyse the characteristics of gaseous coolants. In the last decade, many authors have done a critical study on micro channel heat sinks using conventional theories and they have observed few discrepancies in the numerical results when compared with experimental values. Later it was justified that such dissimilarities existed due to the fact that micro flows do not obey the same physical fundamental laws as in macroflow models. newline