Figure 5 - uploaded by Alexis Giauque
Content may be subject to copyright.
Evolution of the mixing layer growth rate with respect to the convective Mach number for air using PG EoS. Comparison is made with available DNS results in literature and experimental results by Rossmann et al. (2001). Standard deviations are indicated on the plot.

Evolution of the mixing layer growth rate with respect to the convective Mach number for air using PG EoS. Comparison is made with available DNS results in literature and experimental results by Rossmann et al. (2001). Standard deviations are indicated on the plot.

Source publication
Article
Full-text available
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
... self-similar periods are now well defined for each DNS, it is possible to plot the evolution of the mixing layer growth rate with respect to the convective Mach number. Figure 5 shows a comparison between current PG results and available numerical (Freund et al. 2000;Pantano & Sarkar 2002;Kourta & Sauvage 2002;Fu & Li 2006;Zhou et al. 2012;Martínez Ferrer et al. 2017;Matsuno & Lele 2020) and experimental results ( Rossmann et al. 2001) from the literature. Current DNS follow the tendency observed and described in the literature: the well-known compressibility-related reduction of the momentum thickness growth rate as M c increases. ...
Context 2
... order to explain discrepancies observed between DG and PG flows, we perform additional DNS varying the initial thermodynamic operating point. Figure 15 shows the four selected operating points. DGA corresponds to the reference simulation analysed in section 4. DGA's initial operating point is located inside the inversion zone also called BZT region. ...

Similar publications

Thesis
Full-text available
Numerical investigations (2D URANS) of flow past a square cylinder Work Description: External flows past bluff bodies, such as square cylinders, have been studied experimentally very well because of their technical applications. Despite the numerous experimental investigations, numerical simulations of such flows have drawn the interest of many re...

Citations

Article
Full-text available
Of interest to the research community dealing with real gas flows, this study analyzes the influence of the physical complexity of real gases on the amplitude of subgrid-scale (SGS) terms present in the filtered Navier–Stokes equations to be solved in large eddy simulations. The direct numerical simulation results of three academic configurations (homogeneous isotropic turbulence, mixing layer, and channel flow) are filtered from the largest scale in the domain down to the Kolmogorov length scale. The analysis of the filtered flow variables consistently shows that the SGS turbulent stress and the SGS pressure cannot be neglected in the momentum equation. In the total energy equation, SGS pressure work and SGS internal and kinetic fluxes are found to be significant in the inertial zone of the turbulent kinetic energy spectrum. Since in the inertial zone, which corresponds to large filter sizes, specific models have not yet been designed for some of these terms, this study calls for such a modeling effort that will benefit the real gas and organic Rankine cycles research communities.