Large eddy simulation (LES) of a turbulent channel flow with wall roughness on one side was performed by adopting an anisotropy-resolving subgrid-scale (SGS) model at a shear Reynolds number = 395. To investigate the grid dependency of the LES results caused by the SGS model, three grid resolutions were tested under the same definition of a roughness shape by using the immersed boundary method. The obtained results were compared with the direct numerical simulation data without roughness (flat wall) and discussed using general knowledge in this kind of flow fields as reference. The primary concern was focused on how the present SGS model could reduce the grid dependency as well as the affects of roughness on the mean velocity and turbulent stresses.
|Number of pages||4|
|Journal||Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer|
|Publication status||Published - Jan 1 2015|
|Event||8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015 - Sarajevo, Bosnia and Herzegovina|
Duration: Sept 15 2015 → Sept 18 2015
All Science Journal Classification (ASJC) codes
- Fluid Flow and Transfer Processes