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Lid-Driven-Cavity (thermodyn. equation of state)?

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Old   March 17, 2014, 10:48
Default Lid-Driven-Cavity (thermodyn. equation of state)?
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Simone Oz
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Hi there,

I am new here and I have a generall question...actually I have a problem lol

I dont need any derivations just the equation for:

I need the thermodynamic equation of state for the Lid-Driven-Cavity.

thx in advance.

God bless you,
Lisa-Simone
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Old   March 17, 2014, 12:51
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Filippo Maria Denaro
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Quote:
Originally Posted by Simonee View Post
Hi there,

I am new here and I have a generall question...actually I have a problem lol

I dont need any derivations just the equation for:

I need the thermodynamic equation of state for the Lid-Driven-Cavity.

thx in advance.

God bless you,
Lisa-Simone

you question is not clear...if you are resolving standard lid-driven cavity for incompressible flows, there is no thermodinamic equation of state.
For incompressible flow, the pressure is not a thermodinamic function
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Old   March 17, 2014, 15:38
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Simone Oz
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Thank you for your message.

hmm...I don't know.

And is there any thermodynamic equation of state for the Lid-Driven-Cavity for a compressible flow?
If yes, share this equation please


Thx,
Simone
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Old   March 17, 2014, 16:02
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The equation of state for a perfect gas is p=\rho R T, which applies (as the name suggests) to "massless" gas at moderate temperature (no dissociation, chemical reaction) etc.

So it all depends on what fluid you want to simulate.... the problem itself (the lid driven cavity) is independent of the EOS, in fact, you could try to solve it for honey, given that you have the correct EOS.

In that sense, your question doesn't make much sense to me, as it relates two "independent" fields (the flow problem and the fluid)!
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Old   March 18, 2014, 07:34
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Simone Oz
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thank you guys, you were right!
It was just the equation of state for a perfect gas
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