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How to detect the cavitation in water.

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Old   March 23, 2008, 11:24
Default How to detect the cavitation in water.
  #1
jinwon park
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I am solving a highly pressured gas-water flow. In some physical situations, water is cavitated. Can anyone advice me how to simulate this physical event? The fluid flow is compressible and inviscid.
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Old   March 25, 2008, 00:47
Default Re: How to detect the cavitation in water.
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Ahmed
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What causes cavitation to be excited? Answer this question and you will know what to look for. Good Luck
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Old   March 25, 2008, 05:50
Default Re: How to detect the cavitation in water.
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jinwon park
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Thanks for your reply. Water is cavitated when the pressure is lower than a vapor pressure. Experiments usually provide it as zero. Physically, it implies that water cannot sustain tension. Unlike solids, it is cavitated when subjected to a strong expansion wave.

To do, I implemented in the way that when the pressure is lower than zero, the calculated pressure becomes zero instead of any negative pressure. Thanks.
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Old   March 26, 2008, 09:50
Default Re: How to detect the cavitation in water.
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Anton Lyaskin
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Actually there're lots of cavitation models, but they can be difficult to implement if you don't have them in the code already. I don't have many references at hand now, just what I've found in Star-CD manual:

Schmidt, D.P., Rutland, C.J., and Corradini, M.L. 1997. 'A numerical study of cavitating flow through various nozzle shapes', SAE Technical Paper Series 971597, pp. 117-126.

Kubota, A., Kato, H., and Yamaguchi, H. 1992. 'A new modelling of cavitating flows: a numerical study of unsteady cavitation on a hydrofoil section', J. Fluid. Mech., 240, pp. 59-96.

The first one is for barotropic model, the second - for bubble two-phase model.
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