This report describes a study of databases produced by direct numerical simulation of mixing layers developing between opposing flows of two fluids under supercritical conditions, the purpose of the study being to elucidate chemical species-specific aspects of turbulence, with emphasis on helicity. The simulations were performed for two different fluid pairs — O2/H2 and C7H16/N2 — at similar values of reduced pressure.

This work was done by Nora Okong'o and Josette Bellan of Caltech for NASA's Jet Propulsion Laboratory. For further information, access the Technical Support Package free on-line at under the Physical Sciences category.