In order to assess the specific characteristics of turbulence in dense gas flows with respect to ideal gas flows, Direct Numerical Simulations are performed for both FC-70 described using Martin-Hou Equation of State (EoS) and a reference ideal gas, in the case of a forced Homogeneous Isotropic Turbulence (HIT) configuration and of a temporal compressible mixing layer configuration. The forced HIT shows that the statistically stationary turbulent kinetic energy (TKE) spectrum follows quite closely the one obtained in the incompressible case even when the turbulent Mach number is large. It is shown that the weakening of compressible dissipation of the TKE can be related to the decoupling of the density fluctuations from the velocity as well as to the strong weakening of compression shocklets in the dense gas case. The mixing layer case at a convective Mach number \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$M_c=1.1$$\end{document} shows that the well-known compressibility-related reduction of the mixing layer momentum thickness growth rate is not significantly influenced by the EoS. Yet the unstable growth leading to the self-similarity phase is enhanced by the dense gas thermodynamics.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Direct Numerical Simulation of Turbulent Dense Gas Flows


    Additional title:

    Lect.Notes Mechanical Engineering


    Contributors:

    Conference:

    International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power ; 2018 ; Bochum, Germany October 04, 2018 - October 05, 2018



    Publication date :

    2020-07-09


    Size :

    12 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




    Direct Numerical Simulation of Turbulent Flows Using Spectral Method

    Sengupta, Kaustav / Mashayek, Farzad / Jacobs, Gustaaf | AIAA | 2008


    Direct Numerical Simulation of Turbulent Flows Using Spectral Method

    Sengupta, K. / Mashayek, F. / Jacobs, G. et al. | British Library Conference Proceedings | 2008


    Direct Numerical Simulation of Geometric Effects on Turbulent Flows over Riblets

    Ng, Jee Hann / Jaiman, Rajeev K. / Lim, T.T. | AIAA | 2014


    Numerical simulation of turbulent magnetohydrodynamic flows

    Dietiker, Jean-Francois / Hoffmann, Klaus | AIAA | 2001