Observation of the relaxation of composition fluctuations in a binary liquid mixture

N. Easwar, M. Joshua, J.V. Maher and W.I. Goldburg

Physica A: Statistical Mechanics and its Applications, 1983, vol. 118, issue 1, 268-281

Abstract: Light scattering was used to study the decay of concentration fluctuations in a critical mixture of isobutyric acid and water. The aim of the experiment was to study the dynamic interaction between composition and velocity in the mixture. At large wavenumber, the structure factor S(k, t) is observed to decay exponentially, with a relaxation rate somewhat smaller than the equilibrium value. At small k, however, there is a marked departure from the exponential relaxation one expects in the absence of coupling between composition and velocity. Also measured was the spinodal ring diameter, km, as a function of the total scattered intensity, Ctot(t) = (2π)−2 ∫ S(k, t)k2dk. A calculation of Ruiz, based on the above coupling effect, predicts a linear variation of Inkm(t) with Ctot(t) and such a linear variation is observed.

Date: 1983
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/0378437183901929
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:118:y:1983:i:1:p:268-281

DOI: 10.1016/0378-4371(83)90192-9

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().