This paper provides a roughness correction to the latest version of Wall-Distance-Free Wray-Agarwal (WA) one equation turbulence model (WA2018). The results from WA 2018 rough wall model are compared to Spalart-Allmaras model and the previous version of WA roughness model (WA2017). The results from WA2018-Rough model for flow over a flat plate show substantial improvement from the previous version WA2017-Rough and a good agreement with a semi-empirical formula based on experimental results. For flow past a S809 airfoil with surface roughness, WA2018-Rough model performs quite well compared to SA-Rough model.
Mechanical Engineering and Material Sciences Independent Study
Date of Submission
Wen, Tianshu and Agarwal, Ramesh K., "A New Extension of Wray-Agarwal Wall Distance Free Turbulence Model to Rough Wall Flows" (2018). Mechanical Engineering and Materials Science Independent Study. 70.