A micro-machined micro-jet impingement cooling device

Abstract

This study mainly focuses on the flow and heat transfer in a MEMS-based on micro-jet impinging cooling device. This study attempts to correlate the results of numerical analyses with experimental results. The experimental performance of air impinging jet cooling was also compared with mist spray cooling. The numerical simulation is done using the Computational Fluid Dynamic (CFD) software called Fluent. In the numerical simulations, it was found that the heat flux was increased when the channel depth or the air inlet velocity was increased. In the experimental study, the heat transfer coefficients obtained from the numerical simulations are better than those from the experimental results. Mist spray cooling was found to give a greater heat removal rate compared to cooling by impingement of air only. The airflow rate required in the mist cooling system was lower than that of the air impinging jet cooling system for the same heat supplied.