# InterFoam mass conservation question

 Register Blogs Members List Search Today's Posts Mark Forums Read

 September 11, 2007, 20:13 I'm trying to simulate the mot #1 Senior Member   Srinath Madhavan (a.k.a pUl|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 695 Rep Power: 10 I'm trying to simulate the motion of a single air bubble through a column of water. When the simulation starts, the log file reads: MULES: Solving for gamma Liquid phase volume fraction = 0.0013888 Min(gamma) = 0 Max(gamma) = 1 MULES: Solving for gamma After about 0.8 seconds (with time-step size of approximately 0.0001, Max Co = 0.15): MULES: Solving for gamma Liquid phase volume fraction = 0.0013888 Min(gamma) = -2.7143954e-24 Max(gamma) = 0.9551684 MULES: Solving for gamma Why does the maximum gamma in the domain decrease to 0.95? Surely there are significant regions in the domain where only pure water is present. If I'm mistaken can someone explain what Max(gamma) represents. Thanks!

 September 11, 2007, 21:24 Hi, Did you plot the result #2 Senior Member   Pei-Ying Hsieh Join Date: Mar 2009 Posts: 317 Rep Power: 8 Hi, Did you plot the results to check if the results are reasonable? Do you have surface tension turned on? pei

 September 11, 2007, 21:28 Yup, results look reasonable. #3 Senior Member   Srinath Madhavan (a.k.a pUl|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 695 Rep Power: 10 Yup, results look reasonable. Surface tension is defined in transportProperties. How is it turned on?

 September 13, 2007, 11:37 Hi, Any luck? If not, you #4 Senior Member   Pei-Ying Hsieh Join Date: Mar 2009 Posts: 317 Rep Power: 8 Hi, Any luck? If not, you can send me your case. I will take a look at it when I have the spare time. pei

 September 13, 2007, 13:33 Hi Pei, I am running a slig #5 Senior Member   Srinath Madhavan (a.k.a pUl|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 695 Rep Power: 10 Hi Pei, I am running a slightly different case with a very well refined mesh. Now Max(gamma) is at 0.99999993 which I believe is not a problem. However should it decrease to something like 0.9 or 0.95 I will package the case and email it to you. Thanks for your help.

December 9, 2013, 01:19
#6
New Member

Nazanin
Join Date: Sep 2013
Posts: 21
Rep Power: 2
Quote:
 Originally Posted by msrinath80 Hi Pei, I am running a slightly different case with a very well refined mesh. Now Max(gamma) is at 0.99999993 which I believe is not a problem. However should it decrease to something like 0.9 or 0.95 I will package the case and email it to you. Thanks for your help.
Hi Srinath
Do you found your problem?I have a problem like you....

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Prabhas FLUENT 0 December 5, 2006 01:15 timur Phoenics 7 February 15, 2006 09:29 Jaswant Main CFD Forum 8 July 4, 2005 22:32 Diego Nogueira Main CFD Forum 1 July 30, 2004 15:50 Wen Long Main CFD Forum 0 July 6, 2004 15:45

All times are GMT -4. The time now is 20:00.