LIGHT-SCATTERING MEASUREMENTS OF ENTROPY AND VISCOUS FLUCTUATIONS IN A LIQUID FAR FROM THERMAL-EQUILIBRIUM

被引：74

作者：

LAW, BM ^{[1
]}

SEGRE, PN ^{[1
]}

GAMMON, RW ^{[1
]}

SENGERS, JV ^{[1
]}

机构：

[1] UNIV MARYLAND, INST PHYS SCI & TECHNOL, COLLEGE PK, MD 20742 USA

来源：

PHYSICAL REVIEW A | 1990年 / 41卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.41.816

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have performed small-angle Rayleigh-scattering measurements in toluene subject to a large stationary temperature gradient T. The experiments demonstrate the presence of long-range entropy and viscous fluctuations enhancing and modifying the Rayleigh spectrum. The experiments confirm that the viscous-heat-mode contributions vary with (T)2/q4, where q is the wave number of the fluctuations. The observed amplitudes of both the entropy and viscous fluctuations are in excellent agreement with the theoretical predictions for the fluctuations in nonequilibrium fluids. © 1990 The American Physical Society.

引用

页码：816 / 824

页数：9

共 38 条

[1]

ABBISS JB, 1988, OSA P PHOTON CORRELA, V1, P147

[2] THE AMPLITUDE EQUATION NEAR THE CONVECTIVE THRESHOLD - APPLICATION TO TIME-DEPENDENT HEATING EXPERIMENTS [J].

AHLERS, G ;

CROSS, MC ;

HOHENBERG, PC ;

SAFRAN, S .

JOURNAL OF FLUID MECHANICS, 1981, 110 (SEP) :297-334

[3] DETERMINISTIC AND STOCHASTIC EFFECTS NEAR THE CONVECTIVE ONSET [J].

AHLERS, G ;

MEYER, CW ;

CANNELL, DS .

JOURNAL OF STATISTICAL PHYSICS, 1989, 54 (5-6) :1121-1131

[4]

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

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

BOON, JP ;

ALLAIN, C ;

LALLEMAND, P .

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

[6]

Born M., 1984, PRINCIPLES OPTICS

[7] TIME-DEPENDENCE OF CRITICAL CONCENTRATION FLUCTUATIONS IN A BINARY-LIQUID [J].

BURSTYN, HC ;

SENGERS, JV .

PHYSICAL REVIEW A, 1983, 27 (02) :1071-1085

[8] AFTERPULSING EFFECTS IN PHOTON-CORRELATION EXPERIMENTS [J].

BURSTYN, HC .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1980, 51 (10) :1431-1433

[9] MEASUREMENT OF THERMAL-DIFFUSIVITY OF PURE FLUIDS BY RAYLEIGH-SCATTERING OF LASER LIGHT [J].

CORTI, M ;

DEGIORGIO, V .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (07) :953-960

[10] EFFECT OF A FINITE COLLECTION APERTURE ON AUTOCORRELATION LIGHT-SCATTERING SPECTROSCOPY [J].

CZWORNIAK, KJ ;

JONES, DR .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1974, 64 (01) :86-88

← 1 2 3 4 →