ISSN:
1435-1536
Keywords:
Nonequilibrium fluctuations
;
static light scattering
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract We investigate both steady-state and time-dependent nonequilibrium fluctuations by means of very low-angle static light scattering. The system is a thin layer of a binary liquid mixture close to a critical consolution point and placed in a temperature gradient. Due to this choice, the Soret driven nonequilibrium fluctuations are large and their time evolution is slow enough to be followed at ease. We discuss the fastq divergence at steady state and its lowq frustration induced by the presence of gravity. We also report measurements taken during the build-up of the concentration gradient. The data indicate that no additional contributions are present during the time-dependent part of the process beyond those calculated in the quasi-steady-state approximation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01182417
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