Large Eddy Simulation of a Rib-Roughened Turbulent Channel Flow with Heat Transfer and Property Variations
IOWA STATE UNIV AMES DEPT OF MECHANICAL ENGINEERING
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Turbulent channel flow with a rib-roughened wall has been computed with constant heating rate using large eddy simulation. An implicit, second order accurate finite volume scheme was used to solve the time dependent filtered set of equations to determine large eddies, while a dynamic subgrid-scale model was used to account for the subgrid scale effects. A dynamic Prandtl number was introduced to calculate subgrid scale heat transfer. The effects of strong heating on the rib-roughened wall were investigated and Nusselt numbers were computed and compared with experimental data. The instantaneous plots revealed the influence of turbulent heat transfer on velocity, temperature and vorticity in this particular geometry.
- Fluid Mechanics