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Numerical and experimental study of convective heat transfer with complicated turbulent flow in a laboratory dryer for turbulence model assessment

: Ye, Qiaoyan; Pulli, Karlheinz; Scheibe, Andreas; Domnick, Joachim; Gruseck, Daniel

Meyer, J.P.:
Heat Transfer, Fluid Mechanics & Thermodynamics, HEFAT 2008 : Proceedings of the Sixth International Conference, Pretoria, South Africa, 30 June-2 July 2008
Pretoria, ZA, 2008
ISBN: 978-1-86854-691-6
International Conference "Heat Transfer, Fluid Mechanics & Thermodynamics" <6, 2008, Pretoria>
Fraunhofer IPA ()
Lacktrocknung; Wärmeübertragung; Trocknung

This paper presents experimental and numerical investigations of turbulent heat transfer in a laboratory dryer for turbulence model assessment. The CFD code FLUENT was applied. The performance of various models, especially the grid sensitivity to prediction of Nusset numbet, was tested using available DNS data of turbulence channel flow. The kw-sst turbulence model with enhanced wall function that was found to give reasonably accurate prediction of heat transfer with lower grid sensitivity was applied to the flow calculation in the dryer. The calculated velocity profiles near the substrate and heating-up behaviours on pure and combined metal/noise isolating-mat sheets were compared with experimental results.