Weakly nonlinear models for turbulent mixing in a plane mixing layer

William W. Liou, Philip J. Morris

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


New closure models for turbulent free shear flows are presented in this paper. They are based on a weakly nonlinear theory with a description of the dominant large-scale structures as instability waves. Two models are presented that describe the evolution of the free shear flows in terms of the time-averaged mean flow and the dominant large-scale turbulent structure. The local characteristics of the large-scale motions are described using linear theory. Their amplitude is determined from an energy integral analysis. The models have been applied to the study of an incompressible mixing layer. For both models, predictions of the mean flow development are made. In the second model, predictions of the time-dependent motion of the large-scale structures in the mixing layer are made. The predictions show good agreement with experimental observations.

Original languageEnglish (US)
Pages (from-to)2798-2808
Number of pages11
JournalPhysics of Fluids A
Issue number12
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • General Engineering


Dive into the research topics of 'Weakly nonlinear models for turbulent mixing in a plane mixing layer'. Together they form a unique fingerprint.

Cite this