Journal article

Identification of large coherent structures in supersonic axisymmetric wakes

DA von Terzi, RD Sandberg, HF Fasel

Computers and Fluids | Elsevier | Published : 2009


Direct numerical simulation data of supersonic axisymmetric wakes are analysed for the existence of large coherent structures. Wakes at Ma = 2.46 are considered with results being presented for cases at Reynolds numbers ReD = 30, 000 and 100,000. Criteria for identification of coherent structures in free-shear flows found in the literature are compiled and discussed, and the role of compressibility is addressed. In particular, the ability and reliability of visualisation techniques intended for incompressible shear-flows to educe meaningful structures in supersonic wakes is scrutinised. It is shown that some of these methods retain their usefulness for identification of vortical structures a..

View full abstract

University of Melbourne Researchers