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Experimental Investigation Of Flow Maldistribution In Microchannels

C. Anbumeenakshi, T.R.Vijaybabu, M.R.Thansekhar

Recent advances in semiconductor technology have led to the significant increase in power densities encountered in microelectronic equipment. The traditional cooling by air is not sufficient for high heat fluxes, and other means of thermal management must be considered. Among these, cooling by single phase liquids through micro channels is one of the promising directions. The thermal efficiency of micro channelbased heat sinks relies on uniform fluid flow distribution between channels. The shape of the inlet header of the micro channel heat sink plays a vital role in the distribution of fluid through channels. In this an experimental investigation has been carried out with a micro channel setup having 25 numbers of rectangular channels of 0.42 mm width, 4.2 mm depth and 100 mm length with two different types of headers namely rectangular, and trapezoidal. From the experimental results it was found that micro channel with trapezoidal header gives less flow mal distribution when compared to rectangular header.