Numerical simulation of unsteady motion in a turbulent mixing layer
Abstract
Unsteady motion in a two dimensional turbulent mixing layer is simulated numerically. The time averaged NavierStokes equations for mean flow are used; the eddy viscosity model for turbulence is employed. The velocity fluctuation with the maximum spatial amplification rate is obtained by linearized calculation. The flow fields with the fluctuation excited by disturbances added at a fixed point with one, two, or four frequency components are calculated by the use of the finite difference approximation. Some of the features observed experimentally are reproduced, interpreted in terms of wave, and correlated with the results of the linearized calculation.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 December 1984
 Bibcode:
 1984STIN...8529183I
 Keywords:

 Computational Fluid Dynamics;
 Finite Difference Theory;
 Mixing Layers (Fluids);
 NavierStokes Equation;
 Turbulent Boundary Layer;
 Turbulent Mixing;
 Unsteady Flow;
 Computerized Simulation;
 Eddy Viscosity;
 Flow Distribution;
 Fluid Mechanics and Heat Transfer