Direct Numerical Simulations of the PDFs of a Passive Scalar in a Forced Mixing Layer

Abstract

The probability density functions of a passive scalar quantity are calculted in a perturbed mixing layer by means of direct numerical simulations. The results indicate that the two-dimensional rolkip of the unsteady shear layer, and the pairing process in particular, contributes greatly to the generation of the predominant peak of the PDFs within the mixing region,

Keywords:

• direct numerical simulation
• mixing layers
• probability density functions
• coherent structures. Entertainment