Speaker: Li-Zhen Chen

Beijing Computational Science Research Center    

Abstract: The spectral vanishing viscosity (SVV), first introduced by E. Tadmor and Maday, is incorporated into the Navier–Stokes equations for controlling high-wavenumber oscillations.  The SVV approach involves a second-order operator which can be readily implemented in standard spectral element codes. The key result is that monotonicity is enforced via SVV leading to stable discretizations without sacrificing the formal accuracy, i.e., exponential convergence, in the proposed discretization. Several examples are presented to demonstrate the effectiveness of the new approach including a comparison with eddy-viscosity spectral LES of turbulent channel flow. Also we apply this method to the 3D flow transition behind a cylinder.

Date&Time: March 22, 2013 (Friday), 14:30–15:30
Location: 606 Conference Room