Publication Date:
2011-08-19
Description:
The nonlinear interaction between sinuous and varicose instability modes in a plane wake is examined in the nonlinear-nonequilibrium critical layer regime. Equations governing the evolution of the instability wave amplitudes and critical layer vorticity distributions are derived. Numerical solutions for these equations are obtained for a number of wake defects and initial amplitude ratios. The results show that the primary effects of the nonlinear interaction are the suppression of the varicose mode and the downstream shift of the peak of the sinuous mode.
Keywords:
FLUID MECHANICS AND HEAT TRANSFER
Type:
Physics of Fluids A (ISSN 0899-8213); 1; 513-521
Format:
text