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Old   April 14, 2021, 01:11
Default Interfacial area UDF
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How can I obtain "interfacial area" value in a cell with two phases using UDF?

Obviously, I'm using multiphase model.

Thank you for your reply.
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Old   February 23, 2022, 07:04
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It's probably a bit late but it might be helpul for other users, too.
There does not seem to be any documentation about it.

I believe the following should work if we are talking about the default algebraic interfacial area models (ia-particle, ia-ishii, ia-symmetric, ...):

int index = MP_IAD_INDEX(i, j);
const real iac = C_MP_AREA_DENSITY(c, t, index);

i: index of phase-1
j: index of phase-2
c: cell index
t: thread pointer

But check this carefully before you use it!
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Last edited by p.b+cfd; February 23, 2022 at 07:06. Reason: Additional info
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Old   August 16, 2023, 08:02
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What is the function of the macro "MP_IAD_INDEX," as it is not found in the Fluent manual? Thank you very much.
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