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October 5, 2009, 05:31 |
Alphaeqn in bubble Foam
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#1 |
New Member
Sameera
Join Date: Sep 2009
Posts: 15
Rep Power: 17 |
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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October 22, 2009, 11:14 |
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#2 |
Member
Sachin Kanetkar
Join Date: Mar 2009
Posts: 57
Rep Power: 17 |
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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October 23, 2009, 06:25 |
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#3 |
New Member
Sameera
Join Date: Sep 2009
Posts: 15
Rep Power: 17 |
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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October 23, 2009, 10:38 |
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#4 |
Member
Sachin Kanetkar
Join Date: Mar 2009
Posts: 57
Rep Power: 17 |
Please could you explain the case, I havent used these solvers
best wishes sachin |
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