SMALL-ANGLE RAYLEIGH-SCATTERING FROM NONEQUILIBRIUM FLUCTUATIONS IN LIQUIDS AND LIQUID-MIXTURES

被引：87

作者：

LI, WB ^{[1
]}

SEGRE, PN ^{[1
]}

GAMMON, RW ^{[1
]}

SENGERS, JV ^{[1
]}

机构：

[1] UNIV EDINBURGH,DEPT PHYS,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND

来源：

PHYSICA A | 1994年 / 204卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0378-4371(94)90440-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have developed an improved experimental arrangement for measuring small-angle Rayleigh scattering in liquid systems subjected to a stationary temperature gradient. This improved arrangement has enabled us to measure nonequilibrium fluctuations with a simple helium-neon laser. We have used this technique to measure long-range nonequilibrium fluctuations in n-hexane and in several mixtures of n-hexane with toluene, thus complementing measurements for the equimolar mixture obtained previously. The experiments confirm that all diffusive nonequilibrium fluctuations vary with (del T)2/k4, where del T is the imposed temperature gradient and where k is the wave number of the fluctuations. A quantitative comparison of the strength of these nonequilibrium fluctuations with the theoretical predictions is also presented.

引用

页码：399 / 436

页数：38

共 99 条

[1] VELOCITY AUTOCORRELATIONS FOR HARD SPHERES [J].

ALDER, BJ ;

WAINWRIGHT, TE .

PHYSICAL REVIEW LETTERS, 1967, 18 (23) :988-+

[2] DECAY OF VELOCITY AUTOCORRELATION FUNCTION [J].

ALDER, BJ ;

WAINWRIGHT, TE .

PHYSICAL REVIEW A-GENERAL PHYSICS, 1970, 1 (01) :18-+

[3]

ALLAIN C, 1978, J PHYS LETT-PARIS, V39, pL473, DOI 10.1051/jphyslet:019780039024047300

[4]

Andriesse C. D., 1970, Physics Letters A, V33, P419, DOI 10.1016/0375-9601(70)90584-0

[5]

[Anonymous], 1962, STUDIES STAT MECH

[6] EXPERIMENTAL-EVIDENCE FOR BRILLOUIN ASYMMETRY INDUCED BY A TEMPERATURE-GRADIENT [J].

BEYSENS, D ;

GARRABOS, Y ;

ZALCZER, G .

PHYSICAL REVIEW LETTERS, 1980, 45 (06) :403-406

[7]

BIERLEIN JA, 1957, J CHIM PHYS, V54, P827

[8] PROPAGATING THERMAL-MODES IN A FLUID UNDER THERMAL CONSTRAINT [J].

BOON, JP ;

ALLAIN, C ;

LALLEMAND, P .

PHYSICAL REVIEW LETTERS, 1979, 43 (03) :199-203

[9]

Born M., 1980, PRINCIPLES OPTICS

[10]

Brush S. G., 1972, KINETIC THEORY

← 1 2 3 4 5 6 7 8 9 10 →