Session ME - Turbulence Simulations V.
MIXED session, Tuesday afternoon, November 23
Cascade I, Westin Seattle
A non-dissipative, robust, implicit algorithm is proposed for direct numerical and large--eddy simulation of compressible turbulent flows. The algorithm colocates variables in space, but staggers the thermodynamic variables in time. Also, the Navier--Stokes equations are non--dimensionalized using an incompressible scaling for pressure. As a result the incompressible Navier--Stokes equations are recovered in the limit that the Mach number tends to zero. A pressure--correction approach is used to solve the resulting equations. The algorithm is not limited by the acoustic time--scale at low Mach numbers, and is discretely energy--conserving in the incompressible limit. Results are shown for acoustic propagation, the incompressible Taylor problem, periodic shock tube problem, and isotropic turbulence.