TwoPhaseEuler wont converge

olivier · January 31, 2006, 14:37

HI,
I need your help once again :-)
when I make turbulence "on" in bubbleColumn example for twoPhaseEulerFoam solver I have a divergence quickly.
I thought that the problem comes from turbulence model, so I try the model proposed by Sato and Sekoguchi (1975) . the result is the same (divergence)..

Can someone tell me what is the problem ?
NB: I tried the different Schemes

olivier · February 2, 2006, 23:00

Dear all,
Can someone tell me what is the problem with turbulence in twoPhaseEulerFoam.
I changed the bubbleColumn example with another one, the result without
turbulence is correct bat when I active the turbulence (with k-epsilon or
k-epsilon modified proposed by Sato) the problem is almost the same, it appears
immediately.
I patch in the inlet k and epsilon like that:
k=3/2(Uref I)
epsilon=Cmu^(3/4) * k^(3/2)/(0.07*dinlet)
(ref: H.K VERSTEEG & W MALALASEKERA)
thank you

holger_marschall · September 11, 2007, 16:37

Hi,

I have the same problem... Has nobody a solution?

regards
Holger

January 31, 2006, 14:37	HI, I need your help once aga	#1
olivier Member olivier Petit Join Date: Mar 2009 Location: Göteborg, Sweden Posts: 67 Rep Power: 17	HI, I need your help once again :-) when I make turbulence "on" in bubbleColumn example for twoPhaseEulerFoam solver I have a divergence quickly. I thought that the problem comes from turbulence model, so I try the model proposed by Sato and Sekoguchi (1975) . the result is the same (divergence).. Can someone tell me what is the problem ? NB: I tried the different Schemes

February 2, 2006, 23:00	Dear all, Can someone tell m	#2
olivier Member olivier Petit Join Date: Mar 2009 Location: Göteborg, Sweden Posts: 67 Rep Power: 17	Dear all, Can someone tell me what is the problem with turbulence in twoPhaseEulerFoam. I changed the bubbleColumn example with another one, the result without turbulence is correct bat when I active the turbulence (with k-epsilon or k-epsilon modified proposed by Sato) the problem is almost the same, it appears immediately. I patch in the inlet k and epsilon like that: k=3/2(Uref I) epsilon=Cmu^(3/4) * k^(3/2)/(0.07*dinlet) (ref: H.K VERSTEEG & W MALALASEKERA) thank you

September 11, 2007, 16:37	Hi, I have the same problem	#3
holger_marschall Senior Member Holger Marschall Join Date: Mar 2009 Location: Darmstadt, Germany Posts: 125 Rep Power: 19	Hi, I have the same problem... Has nobody a solution? regards Holger __________________ Holger Marschall web: http://www.holger-marschall.info mail: holgermarschall@yahoo.de

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