Large eddy simulations of turbulent flow around complex geometries are presented. A non-body conformal grid method is developed and combined into the compressible Navier-Stokes solver. Time derivative preconditioning is used to deal with the low Mach number situation. A second-order accurate finite volume formulation is chosen and the implicit LU-SGS scheme is implemented. A localized dynamic subgrid-scale (SGS) model is used to evaluate the subgrid-scale stresses and heat fluxes. A second-order bilinear (for 2D situation) or trilinear (for 3D situation) interpolation method is employed to satisfy the no-slip boundary condition on the immersed boundary. The method is validated for flow past a circular cylinder with different Reynolds numbers. Large eddy simulation of pipe flow with high Reynolds numbers using this non-body conformal grid method is conducted and the turbulent statistics are consistent with body-fitted grid method results. Furthermore, the LES simulation results with non-body conformal grids for channel flow containing a rod bundle are presented.
- Fluids Engineering Division
Large Eddy Simulation of Compressible Flows Using a Non-Body Conformal Grid Method
Wang, W, & Pletcher, RH. "Large Eddy Simulation of Compressible Flows Using a Non-Body Conformal Grid Method." Proceedings of the ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. Volume 1: Symposia, Parts A and B. Miami, Florida, USA. July 17–20, 2006. pp. 375-384. ASME. https://doi.org/10.1115/FEDSM2006-98440
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