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Temporal evolution of the mixing layer momentum thickness for Mc = 0.1/1.1/2.2 using air with PG EoS. Slopes are non-dimensional and standard deviations computed over the self-similar period are indicated on the plot.

Temporal evolution of the mixing layer momentum thickness for Mc = 0.1/1.1/2.2 using air with PG EoS. Slopes are non-dimensional and standard deviations computed over the self-similar period are indicated on the plot.

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The present article investigates the effects of a BZT (Bethe-Zel'dovich-Thompson) dense gas (FC-70) on the development of turbulent compressible mixing layers at three different convective Mach numbers Mc = 0,1; 1,1 and 2,2. This study extends previous analysis conducted at Mc = 1,1 (Vadrot et al. 2020). Several 3D direct numerical simulation (DNS)...

Contexts in source publication

Context 1
... Temporal evolution and self-similarity Figure 3 shows the temporal evolution of the momentum thickness normalized by its initial value. This key quantity characterizes the development of mixing layers. ...
Context 2
... and standard deviations mentioned in figure 3 are computed over the self-similar period. One can observe that the growth rate is divided by a factor of about two between DNS at M c = 2.2 and at M c = 1.1. ...
Context 3
... the current analysis, we increase the convective Mach number in order to reach larger turbulent Mach numbers during the self-similar period and to analyse the influence of shocklets. Figure 13 shows the temporal evolution of the turbulent Mach number M t (see equation 1.4). Turbulent Mach numbers increase during the initial phase up to 1.1 and 0.9 respectively for DG and PG flows. ...

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