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|Author(s):||Randall J. McDermott; Hyun Wook Park; Kiyoung Moon; Ezgi Oztekin; Changhoon Lee; Jung-il Choi;|
|Title:||Near-Wall Modeling for Large Eddy Simulation of Convective Heat Transfer in Turbulent Boundary Layers|
|Published:||November 18, 2012|
|Abstract:||A well-known challenge for large eddy simulation (LES) is to provide a smooth transition from molecular to turbulent transport near the wall without having to explicitly resolve the viscous sublayer. We propose a simple but efficient approach based on modeling of wall shear stress and heat flux that enables accurate prediction of Nusselt number correlations for equilibrium boundary layers. The wall shear stress is treated directly with the Werner and Wengle (1991) power law model and the wall heat flux is modeled analogously with the Kader (1981) empirical correlation. Using these wall models, we perform simulations of turbulent convective heat transfer in a channel for various Prandtl numbers. The results show good agreement with the available experimental and numerical data.|
|Keywords:||Convective Heat Transfer, Large-Eddy Simulation, Near-Wall Modeling, Turbulent Boundary Layers|
|Research Areas:||Fire Modeling, Building and Fire Research|
|PDF version:||Click here to retrieve PDF version of paper (42KB)|