Numerical investigation of combined impingement and convection heat transfer.
This paper concerns development of a prediction method for combined turbulent impingement and convection heat transfer. Firstly, a prediction of a single round unconfined impinging air jet without crossflow is investigated to assess the performance of linear and non-linear two-equation turbulence models. The results show that realizable and/or non-linear two-equation models may successfully be used for impinging jet heat transfer predictions but there are significant differences between the formulations. Among the models tested, a non-linear k-omega showed superior performance. Secondly, the influence of crossflow is considered and a plane confined air jet is investigated. For this case the models based on a frequency-equation (omega) show quite different and more reasonable predictions compared to the dissipation-equation (epsilon) based models.
Abdon
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Division of Heat Transfer, Lund Institute of Technology, Box 118, 22100 Lund, Sweden.
Sundén
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