Micro-Scale Jet Cooling: A Numerical Study on Improvement Options

With the continuous advances in electronics and rise of computation power, the need for efficient cooling solutions has increased even more. Single phase jet impingement cooling on the bare die has been shown to be an effective active cooling technique for devices requiring high performance cooling to operate. Within the constraints of allowable cooler size, needed pressure drop, and the desired cooling performance, however, optimization covering a range of parameters is necessary. In this work a numerical study covering the impact and interaction of multiple parameters, utilizing computational fluid dynamics modelling with conjugated heat transfer is presented. From an experimental reference cooler providing a heat transfer coefficient of
$\mathbf{3}.\mathbf{7}\ \mathbf{W}/\mathbf{cm}^{\mathbf{2}}\mathbf{K}$
steps are taken to propose a cooler capable of achieving a heat transfer coefficient of
$\mathbf{5}.\mathbf{8}\ \mathbf{W}/\mathbf{cm}^{\mathbf{2}}\mathbf{K}$
at the same coolant (DI water) flowrate of 3 L/min, while only incurring 2.52 times as much pressure drop as the reference.