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Heat Transfer Research

ISSN for PRINT: 1064-2285

Institutional price:	$2485.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2004, Volume35

134 pages

DOI: 10.1615/HeatTransRes.v35.i12

Issue price - $674.00

Limit Superheating of Solutions in the Region of Negative Pressures

V. E. Vinogradov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia

P. A. Pavlov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia

ABSTRACT

The dependence of the temperature of limit superheating of water-acetone, water-isobutyl alcohol, acetone-n-hexane, and acetone-ethyl alcohol solutions on the pressure in the region of negative pressures to −10 MPa has been studied experimentally. The dependences of the temperature of the limit superheating of the liquid under study on the negative pressure value are obtained. Nucleation frequencies from 10²⁴ to 10²⁶ were implemented in the experiments. The experiments have shown that in the case of organic liquid solutions the boundary of the attainable superheatings T_sup(P)_J passes constantly from the region of positive pressures to the region of negative pressures and practically coincides with the homogeneous nucleation theory calculations. Earlier, this was observed in experiments with pure organic liquids. In water solutions, the dependences T_sup(P)_J bend to the side of a smaller limit superheating temperature in transition from positive to negative pressures in the region of water concentrations exceeding the concentration of an azeotropic solution.