Simulation of plane impinging jets with k–ω based hybrid RANS/LES models
| Autor: | Erik Dick, Slawomir Kubacki |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Technology and Engineering
Convective heat transfer PREDICTION FLAT-PLATE Thermodynamics Reynolds stress RECIRCULATING-FLOWS Turbulence modelling Plane impinging jet HEAT-TRANSFER Shear stress INLET Fluid Flow and Transfer Processes Physics Jet (fluid) LARGE-EDDY SIMULATION Turbulence Mechanical Engineering RENORMALIZATION-GROUP CALCULATIONS SLOT JET Mechanics VELOCITY Condensed Matter Physics 2-EQUATION TURBULENCE MODELS k-omega Model Hybrid RANS/LES model Heat transfer Reynolds-averaged Navier–Stokes equations Large eddy simulation |
| Zdroj: | INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW |
| ISSN: | 0142-727X |
| DOI: | 10.1016/j.ijheatfluidflow.2010.04.011 |
| Popis: | Plane impinging jets with nozzle-plate distances H / B = 10, 9.2 and 4 and Re = 13,500, 20,000 are simulated with k – ω based hybrid RANS/LES models and with a RANS k – ω model. The results are compared to experimental and LES data. Three different ways of substitution of the turbulent length scale by the local grid size in the LES mode of the hybrid RANS/LES models are tested. The results show that the hybrid models give much better prediction of the wall shear stress and the heat transfer rate along the impingement plate than the pure k – ω RANS model. The good performance of the hybrid models is due to their ability to resolve the evolution and break-up of the vortices in the shear layer of the jet, which strongly affects the turbulent flow and convective heat transfer in the stagnation region and the developing wall-jet region. |
| Databáze: | OpenAIRE |
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