TwoPhaseEuler wont converge

olivier · January 31, 2006, 15:37

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 3, 2006, 00:00

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, 17:37

Hi,

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

regards
Holger

January 31, 2006, 15:37	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 3, 2006, 00:00	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, 17:37	Hi, I have the same problem	#3
holger_marschall Senior Member Holger Marschall Join Date: Mar 2009 Location: Darmstadt, Germany Posts: 126 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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
RSM do not converge	Eric Wang	CFX	3	January 13, 2009 04:31
coupled solver wont work in star ccm+	richie	Siemens	5	November 4, 2008 05:51
K-eps what should converge first? what last?	Nick	FLUENT	1	May 2, 2007 07:52
My Solution wont Converge!!!	Chris	FLUENT	6	April 16, 2005 19:57
why it can not converge	apple	FLUENT	21	July 16, 2001 04:18