Advancements in turbulence modelingDirect simulation data are used to test newly proposed nonlinear models in the Reynolds stress anisotropy for the rapid pressure-strain terms. It is found that the nonlinear models will perform better than the linear models. In addition to testing the rapid pressure-strain models, a new k-epsilon model is proposed for near-wall flow simulation. The model is proposed for near-wall flow simulation. The model was developed by fitting low-Reynolds number data from a direct simulation of a channel flow. A new wall-correction for the eddy-viscosity as well as wall-corrections for the epsilon-equation are proposed. The model will give better predictions of the turbulent kinetic profile in the near-wall region than existing models.
Document ID
19900058210
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mansour, N. N. (NASA Ames Research Center Moffett Field, CA, United States)
Shih, T. H. (NASAStanford Center for Turbulence Research Stanford, CA, United States)