42nd NIA CFD Seminar: Higher-Order Moments and Their Modeling Approximations in a Turbulent Channel Flow Subjected to Mean Strain
Speaker: Elbert Jeyapaul
Biography: Dr. Elbert Jeyapaul is a post-doctoral fellow at NIA, working on RANS turbulence modeling. He received his doctorate in Aerospace engineering in 2011 from Iowa state university.
Abstract: Third- and fourth-order moments and the budget terms in their transport equations are evaluated using results from Direct Numerical Simulations (DNS) of a turbulent channel flow at Re_tau = 395, to aid in the development of higher-order Reynolds-Averaged Navier Stokes (RANS) closure models. These models have been proposed as a means of obtaining more accurate predictions of complex flows. Strain has been applied to this channel to mimic a spatially-evolving adverse pressure gradient flow leading to separation. Existing modeling hypothesis that relate higher-order moments to their lower-order moments, such as gradient diffusion and assumed probability distribution functions have been tested. Insights into where to focus modeling efforts will be presented.
Additional information, including the webcast link, can be found at the NIA CFD Seminar website, which is temporarily located at: