
Among its many applications, synthetic jets have received much consideration as devices with the ability to enhance or even replace more conventional forced convection cooling techniques. This enhanced cooling is a result of the increase in turbulent mixing brought about by the oscillatory nature of the jet. In this study, the cooling effect of a single synthetic jet impinging directly on a heated surface is examined in a 2-D numerical simulation. Several test cases were examined involving changes in the distance between the heated surface and the jet source, jet Reynolds number, pulsing frequency and Prandtl number. Examination of the timed-averaged velocity field confirms that the synthetic jet forms a circulation cell similar to a steady jet but with more fragmented vorticity. Instantaneous contours of the temperature field also demonstrate the ability of the synthetic jet to redistributed incoming heat through the circulation cell more efficiently than a steady jet. Data from all test cases was reduced through a minimization problem to form a Nusselt number correlation involving the previously mentioned parameters.
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