Abstract
The aim of this study is to investigate heat transfer characteristics of a circular array of air jets impinging on to a heat sink under a thermal load through CFD simulation. This is necessary to maintain the optimum temperature for the component to function as efficiently as possible. The simulation is done using a conjugate heat transfer model along with an SST k-ω model to model the turbulence in ANSYS FLUENT. The dependent parameters are the inlet Reynolds number and the non-dimensional quantity Z/d representing the ratio of distance between the inlet and the imping surface, to the inlet jet diameter. Multiple values of Z/d and Inlet Reynolds number are taken for each iteration. It is seen that the steady state temperature drops from 85 °C to 60 °C when the inlet Reynolds number goes from Re = 6000 to Re = 12000. The temperature goes from 61 °C to 69 °C when the Z/d ratio is changed from 4 to 10.
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