The Proceedings of the Thermal Engineering Conference
Online ISSN : 2424-290X
2013
Session ID : I215
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I215 DNS of Two-Dimensional Jet Impingement Cooling on Target Surface with a Rib
Yutaka OdaKenichiro Takeishi
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Abstract
Two-dimensional jet impingement heat transfer enhanced by a square rib has been studied by direct numerical simulation (DNS) to compare predicted Nusselt number with that given by naphthalene sublimation method. In addition to Prandtl number (Pr) of 0.71 for air, Pr of 2.29 equivalent to the Schmidt number in the mass transfer experiment was selected for comparison. The DNSs with different Pr numbers give the local value of the exponent, which is assumed uniform in the conversion of mass transfer coefficient to heat transfer coefficient in the experiments. As a result, it is clarified that the local discrepancy of Nusselt number between the former experiments and simulations has come from the assumption of uniform exponent in the mass transfer experiment.
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© 2013 The Japan Society of Mechanical Engineers
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