NOISE-SUSTAINED STRUCTURE IN TAYLOR-COUETTE FLOW WITH THROUGH-FLOW

被引:96
作者
BABCOCK, KL [1 ]
AHLERS, G [1 ]
CANNELL, DS [1 ]
机构
[1] UNIV CALIF SANTA BARBARA,CTR NONLINEAR SCI,SANTA BARBARA,CA 93106
关键词
D O I
10.1103/PhysRevLett.67.3388
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report experimental and theoretical results for the absolute and convective instability boundaries in Taylor-Couette flow with imposed axial flow as a function of the axial Reynolds number. Experiment and theory agree quantitatively. In the downstream region Of a large-aspect-ratio system, noise-sustained structures of traveling vortices exist in much of the convectively unstable regime. These structures have a nearly time-independent amplitude, but a noisy phase. The phase noise ceases abruptly upon crossing the absolute instability boundary.
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页码:3388 / 3391
页数:4
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