Direct numerical simulation of bifurcating jets

被引：63
|
作者：
Danaila, I
Boersma, BJ
机构：
[1] Stanford Univ, Ctr Turbulence Res, Stanford, CA 94305 USA
[2] IRPHE, F-13003 Marseille, France
来源：
PHYSICS OF FLUIDS | 2000年 / 12卷 / 05期
关键词：
D O I：
10.1063/1.870377
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The mechanisms leading to bifurcating jets are investigated by means of direct numerical simulation. Two distinct types of jets were obtained by applying a bi-modal perturbation at the nozzle. When forcing simultaneously the counter-rotating helical modes (flapping mode) with the same amplitude and the same frequency, the jet splits into two branches, taking a distinct Y-shape. A different evolution of the jet (Psi-shape) is observed when superposing the axisymmetric mode at the most amplified unstable frequency on the flapping mode with the same amplitude, but subharmonic frequency. In both cases a spectacular increase of the jet spreading is observed. (C) 2000 American Institute of Physics. [S1070-6631(00)00404-9].
引用
收藏
页码：1255 / 1257
页数：3
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