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A study of the fine-scale motions of incompressible time-developing mixing layers. (English) Zbl 0827.76031
The geometry of dissipating motions in direct numerical simulations of the incompressible mixing layer is examined. All nine partial derivatives of the velocity field are determined at every grid point in the flow, and various invariants and related quantities are computed from the velocity gradient tensor. Motions characterized by high rates of kinetic energy dissipation and high enstrophy density are of particular interest. Scatter plots of the invariants are mapped out and interesting and unexpected patterns are seen.

76F10 Shear flows and turbulence
76M99 Basic methods in fluid mechanics
Full Text: DOI
[1] DOI: 10.1063/1.857730
[2] DOI: 10.1063/1.858846
[3] DOI: 10.1017/S0022112093000473 · Zbl 0825.76685
[4] DOI: 10.1017/S0022112088000345 · Zbl 0641.76050
[5] DOI: 10.1063/1.866513
[6] DOI: 10.1063/1.858295 · Zbl 0754.76004
[7] DOI: 10.1063/1.858828 · Zbl 0794.76044
[8] DOI: 10.1063/1.858282
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