The Vortex Tube: Two Phase Flow

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Motivation: With large energy separation comes condensation in the cold tube. However, location of droplet formation is delayed in the core flow because of lack of nucleating sites. Many questions arise from either trying to promote or delay the appearance of droplets.

Approach: Using large pressure drops and large diameters generators, small wire probes are to be inserted into the cold exhaust to promote condensation.

Fundamental Issues: many questions about the nonequilibrium thermodynamics of the exhausting flow require understanding including time and length scales.



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