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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates: Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution. The presence of...

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Related Experiment Video

Updated: May 8, 2026

Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures

Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures

Published on: June 28, 2017

Quench cooling under reduced gravity.

D Chatain¹, C Mariette, V S Nikolayev

¹Service des Basses Températures, UMR-E CEA/UJF-Grenoble 1, INAC, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|August 16, 2013

Summary

This summary is machine-generated.

Quench cooling in microgravity is slow due to gas insulation. Subcooling liquid oxygen significantly reduces cooling time by improving heat exchange, aiding heat transfer analysis.

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Area of Science:

Thermodynamics
Fluid Dynamics
Materials Science

Background:

Quench cooling is a critical process in various industrial applications.
Understanding heat transfer dynamics under different gravity conditions is essential for optimizing cooling processes.
Previous studies have not fully explored the impact of microgravity on liquid oxygen quench cooling.

Purpose of the Study:

To investigate the effect of varying gravity levels on the quench cooling of a copper disk using liquid oxygen.
To analyze the influence of subcooling and gas pressurization on heat transfer efficiency during quench cooling.
To determine the applicability of these experiments for analyzing critical heat flux and film boiling heat transfer.

Main Methods:

Experiments were conducted using liquid oxygen at different simulated gravity levels achieved through magnetic gravity compensation.
A copper disk was quenched from 300 K to 90 K.
The effect of weak gas pressurization, leading to subcooling, was investigated to assess its impact on cooling time and heat exchange.

Main Results:

Cooling time in microgravity was significantly longer compared to other gravity levels, attributed to the insulating effect of surrounding gas.
Weak gas pressurization and subcooling drastically improved heat exchange, reducing cooling time by approximately 20 times.
The study found that these experiments are not suitable for analyzing the critical heat flux of the boiling crisis.

Conclusions:

Gravity significantly influences quench cooling efficiency, with microgravity posing challenges due to gas insulation.
Subcooling liquid oxygen is an effective method to enhance heat transfer and reduce cooling times.
The film boiling heat transfer and minimum heat flux were analyzed as functions of gravity and subcooling, providing insights into heat transfer phenomena.