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Negative absolute pressure

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Old   September 8, 2012, 06:27
Default Negative absolute pressure
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Jack B.
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Hello all,

I've a question regarding negative absolute pressure values I get in the flow field and their meaning.

I ran an incompressible transient laminar flow past a circular cylinder with zero reference pressure. When I check the variation of absolute pressure in certain points close to the cylinder, I get negative values. I should add the problem is not physically well defined in means of density, visocisty etc., but rather theoretic.

Although negative values of abolute pressure are not physical as far as I know, can I trust those values?

Thanks,
Jack
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