On Tuesday, October 14, from 11:00 a.m. to 12:00 p.m. MT, join NSF NCAR’s High Altitude Observatory (HAO) for a colloquium. The talk is entitled "Helicity turbulence model: Validations and application to stellar angular-momentum transport." The speaker is Nobumitsu Yokoi, who is from the Institute of Industrial Science, University of Tokyo.
Helicity is an inviscid invariant that contributes in a crucial way to the dynamic and statistical properties of turbulence. The talk will discuss how inhomogeneous turbulent helicity enters the Reynolds-stress expression as the coupling coefficient of the mean absolute vorticity and how it can counterbalance the eddy-viscosity coupled with the mean velocity strain. A subgrid-scale turbulence model with structural effects is constructed and applied to stellar convection.
