Recent progress in compressible turbulence

In this paper, we review some recent studies on compressible turbulence conducted by the authors’ group, which include fundamental studies on compressible isotropic turbulence (CIT) and applied studies on developing a constrained large eddy simulation (CLES) for wall-bounded turbulence. In the first part, we begin with a newly proposed hybrid compact–weighted essentially nonoscillatory (WENO) scheme for a CIT simulation that has been used to construct a systematic database of CIT. Using this database various fundamental properties of compressible turbulence have been examined, including the statistics and scaling of compressible modes, the shocklet–turbulence interaction, the effect of local compressibility on small scales, the kinetic energy cascade, and some preliminary results from a Lagrangian point of view. In the second part, the idea and formulas of the CLES are reviewed, followed by the validations of CLES and some applications in compressible engineering problems.

This paper reviews some recent research on compressible turbulence from the authors’ group, including fundamental studies on compressible isotropic turbulence (left) and applied studies on developing a constrained large eddy simulation method for wall-bounded turbulence (right). These topics are two of the main directions in current turbulence research, and our results, which are new and important, fill gaps in the relevant area.