RT Journal Article ID 536bb52206a1fd5f A1 Hatay, Ferhat F. A1 Biringen, Sedat T1 Direct Simulation of Low-Reynolds Number Supersonic Wall-Shear Layers II: Statistical Analysis and Energy Budgets JF International Journal of Fluid Mechanics Research JO FMR YR 1999 FD 1999-02-01 VO 26 IS 1 SP 17 OP 35 AB In this paper, one- and two-dimensional two-point (double) correlations from an existing data base for a compressible turbulent shear-layer flow are presented and discussed; computational results are compared with incompressible and compressible turbulent boundary layer experiments. Quantitative comparisons are done by using the one-dimensional correlation tensor whereas two-dimensional correlation data are studied qualitatively to establish the similarities and the differences between compressible and incompressible wall-shear layer flows. A key aspect in the direct numerical simulations of turbulent flows, the adequacy of the extent of the computational domain, is also assessed through the inspection of the correlation distributions.
The focus of this work is to explore the paths of energy transfer through which compressible turbulence is sustained. The structural similarities and differences between the incompressible and compressible turbulence are also investigated. The energy flow patterns or energy cascades are found to be directly related to the evolution of vortical structures which are generated in the near-wall region. Near-wall structures, and mechanisms which are not readily accessible through physical experiments are analyzed and their critical role on the evolution and the behavior of the flow is documented extensively. PB Begell House LK https://www.dl.begellhouse.com/journals/71cb29ca5b40f8f8,489131dd7a14510e,536bb52206a1fd5f.html