Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment.

Details Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment. Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment.

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phdt........87b&link_type=abstract

Thesis (PH.D.)--UNIVERSITY OF MARYLAND COLLEGE PARK, 1992.Source: Dissertation Abstracts International, Volume: 53-10, Section:

Computer Science

1

Scientific paper

We show how the extreme compressibility of a pure fluid near its critical point significantly affects its bulk dynamic response to temperature changes through adiabatic processes. We develop equations that describe the dynamics in the absence of gravity, and illustrate the magnitude of the effect with numerical solutions in one dimension. The results show that adiabatic processes allow the fluid to thermalize in a matter of seconds, compared with the hours or days that thermal diffusion would require. Moreover, the adiabatic transient is faster when the fluid is closer to the critical point. These theoretical results are confirmed by our experimental measurements of transmission response of a critical xenon following a heat pulse applied at one end of the fluid. The turbidity measurements demonstrate the fast time scale of the adiabatic transient and the critical speeding up phenomenon. Moreover, the results show that, although the presence of gravity complicates the dynamics of the fluid, it does not eliminate the influence of adiabatic effects. Here we show that gravity-driven convection can be avoided if the temperature gradient across the fluid is smaller than the adiabatic temperature gradient.

Affiliated with

Also associated with

No associations

Rating

Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adiabatic Effects in a Fluid Near its Liquid-Gas Critical Point: Theory and Experiment. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-940020