Phase separation in critical and off-critical fluids: specific experimental behaviours at criticality

Guenoun, P and Beysens, D and Perrot, F and Garrabos, Y and Kumar, A (1994) Phase separation in critical and off-critical fluids: specific experimental behaviours at criticality. In: 2nd Liquid Matter Conference of the European-Physical-Society, SEP 18-22, 1993, FLORENCE, ITALY.

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Abstract

The phase separation in fluids close to a critical point can be observed in the form of either an interconnected pattern (critical case) or a disconnected pattern (off-critical case). These two regimes have been investigated in different ways. First, a sharp change in pattern is shown to occur very close to the critical point when the composition is varied. No crossover has been observed between the t1 behaviour (interconnected) and a t1/3 behaviour (disconnected), where t is time. This latter growth law, which occurs in the case of compact droplets, will be discussed. Second, it has been observed that a growing interconnected pattern leaves a signature in the form of small droplets. The origin of such a distribution will be discussed in terms of coalescence of domains. No distribution of this kind is observed in the off-critical case.

Item Type:	Conference Paper
Publisher:	Institute of physics
Additional Information:	Copyright of this article belongs to Institute of physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	08 Apr 2011 10:11
Last Modified:	08 Apr 2011 10:11
URI:	http://eprints.iisc.ac.in/id/eprint/36688

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