PMID: 15244721Jul 13, 2004Paper

Three-dimensional simulation of square jets in cross-flow

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Amalendu SauW C Yang

Abstract

Direct numerical simulations are performed to predict the three-dimensional unsteady flow interactions in the near-field of a square jet issuing normal to a cross-flow. The simulated flow features reveal the formation of an upstream horseshoe vortex system, which is the result of an interaction between the oncoming channel floor shear layer and the transverse jet; the growth of a sequence of Kelvin-Helmholtz instability-induced vortical rollers in the mixing layer between the jet and the cross-flow, which wrap around the front side of the jet; and the inception process of the counter-rotating vortex pair (CVP), which is initiated through the folding of the lateral jet shear layers. It has been observed that for a square jet in cross-flow, the developed Kelvin-Helmholtz instability induced shear layer rollers do not form closed circumferential vortex rings. Along the downstream side of the jet, the extended tails of such rollers gradually join the locally evolving CVP. The very inception of the CVP is, however, observed to take place within the cross-flow-induced skewed lateral jet shear layers, and such inception was seen to occur slightly below the jet orifice. The simulated results also reveal the growth of the upright wake v...Continue Reading

References

Jan 22, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·T P ChiangA Sau
Dec 20, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Amalendu SauW C Yang

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Citations

May 24, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·T P ChiangRobert R Hwang
Dec 21, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S H Lai, W-H Ip

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