DIA and non-linear self-damping in a 2-D Navier-Stokes simulation
Truncated Fourier expansions (Galerkin methods) are particularly suitable for exploring the limit of small viscosity in turbulence simulations, due to the absence of numerical viscosity. S. Orszag's powerful dealiasing procedures and Gray vectorization optimization make 2-D Navier-Stokes simulations possible on a large grid. As a large fraction of the modes are close to the spectral truncation boundary, the method of a DIA-based eddy damping term self-consistently accounts for modes outside the boundary. The code ASTER was developed as a tool for exploring this technique for further use in simulations in plasma confinement geometries.
Bibliographic Reference: Paper presented: Reunion d'automne de la Societe Suisse de Physique, Luzern (CH), Oct 8-9, 1987 Article: Helvetica Physica Acta, Vol. 61 (1988) No. 1/2
Availability: Available from (1) as Paper EN 33588 ORA
Record Number: 198910325 / Last updated on: 1994-12-01
Original language: en
Available languages: en