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Numerical investigation of the flow and heat behaviours of an impinging jet
Authors:Peng Wang  Minli Bai  Yuyan Wang  Chengzhi Hu
Institution:School of Energy and Power Engineering, Dalian University of Technology, Dalian City, China
Abstract:The flow and temperature fields of a turbulent impinging jet are rather complex. In order to accurately describe the flow and heat-transfer process, two important factors that must be taken into account are the turbulence model and the wall function. Several turbulence models, including κ–? turbulence models, κ–ω turbulence models, low-Re turbulence models, the κ–κl–ω turbulence model, the Transition SST turbulence model, the V2F turbulence model and the RSM turbulence model, are examined and compared to experimental data. Furthermore, for the near wall region, various wall functions are presented for comparison and they include the standard wall function, the scale wall function, the non-equilibrium wall function and the enhanced wall function. The distribution features of velocity, turbulent kinetic energy and Nusselt number are determined in order to provide a reliable reference for the multiphase impinging jet in the future.
Keywords:impingement jet  turbulence model  wall function  heat transfer  CFD
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