AMPLIFICATION OF THERMAL NOISE VIA CONVECTIVE INSTABILITY IN BINARY-FLUID MIXTURES

被引：25
|
作者：
SCHOPF, W
REHBERG, I
机构：
来源：
EUROPHYSICS LETTERS | 1992年 / 17卷 / 04期
关键词：
HYDRODYNAMIC STABILITY AND INSTABILITY; TURBULENT FLOWS; CONVECTION; AND HEAT TRANSFER; FLUCTUATION PHENOMENA; RANDOM PROCESSES; AND BROWNIAN MOTION;
D O I：
10.1209/0295-5075/17/4/007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In the convectively unstable regime of a binary-fluid mixture in a quasi-one-dimensional ramped convection channel an erratic spatio-temporal behaviour of very small amplitudes is observed. These patterns are interpreted as the amplification of intrinsic noise. Their measured temporal correlation functions are compared with the theoretical ones obtained from a Ginzburg-Landau equation containing a noise term. The measured intensity confirms the assumption that the fluctuations are due to thermal noise.
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页码：321 / 326
页数：6
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