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Alphaeqn in bubble Foam

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Old   October 5, 2009, 04:31
Default Alphaeqn in bubble Foam
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Sameera
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Hi friends,
You can find this part of program in alphaEqn of bubbleFoam
{
/* fvScalarMatrix betaEqn
(
fvm::ddt(beta)
+ fvm::div(phi, beta, scheme)
+ fvm::div(-fvc::flux(phir, scalar(1) - beta, scheme), beta, scheme)
);
betaEqn.relax();
betaEqn.solve();

alpha = 0.5*(scalar(1) + sqr(scalar(1) - beta) - sqr(scalar(1) - alpha));
*/
}

I am again asking questions about volume fractions in bubble column tutorial,
1) whats this beta equation,
2) is it volume intialzation file of water or other fluid???,
3) Whats the equation in block font represent is it correction factor for alpha ?

Can anyone explain me this doubt,
thanks in advance,

Anticipating for your kind reply,
Sameera
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Old   October 22, 2009, 10:14
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Sachin Kanetkar
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hi
I doubt if that code runs because /* .......... */
in the end we have beta=1-alpha...still we there might have be something else to it
still i am not sure somebody else might help

good luck
sachin
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Old   October 23, 2009, 05:25
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Sameera
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Thanks Sachin,
yes as you told, beta equation doesnt work, beta takes the value (1-alpha),
I had one more doubt, velocity given to water(Ub) in UEqn.H file does not work, I mean we cannot see any motion of water, except gase flow is seen,
can you see this please,
thank you in advance,
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Old   October 23, 2009, 09:38
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Sachin Kanetkar
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Please could you explain the case, I havent used these solvers

best wishes
sachin
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