Analysis of turbulence characteristics in a temporal dense gas compressible mixing layer using direct numerical simulation

Direct numerical simulations of temporal compressible mixing layers in a Bethe–Zel'dovich–Thompson dense gas: influence of the convective Mach number

“…Evolution of the mixing layer growth rate as a function of the convective Mach number is compared between PG and DG flows. This study extends previous analysis conducted at (Vadrot, Aurélien & Alexis 2020).…”

“…An unusual behaviour is noticed, as the decrease of the mixing layer growth rate with the convective Mach number does not follow the same evolution between DG and PG flows. The discrepancy is not significant at lower Mach number (Vadrot, Aurélien & Alexis 2020) but when the convective Mach number increases, DG mixing layer growth is influenced by modified thermodynamic behaviour. Differences are first analysed in the context of the peculiar shocklets properties in BZT DG flows.…”

“…The problem consists in extending the analysis conducted at in Vadrot, Aurélien & Alexis (2020) by performing a DNS of a three-dimensional mixing layer at a convective Mach number for air considered as a PG and for a BZT DG: the perfluorotripentylamine (FC-70, ). Physical parameters associated with FC-70 and used in these DNS are given in table 1.…”

“…The evolution is plotted for three different convective Mach numbers (). Results at are extracted from Vadrot, Aurélien & Alexis (2020). The same Reynolds number () based on the initial momentum thickness is used for the three different DNS.…”

“…Recently, Vadrot, Aurélien & Alexis (2020) performed DNS of temporal compressible mixing layers for BZT DG flow and PG flow at a convective Mach number , which is defined as where and denote the flow speed and the sound speed of stream (upper or lower) of the mixing layer.…”