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Old   September 11, 2007, 20:13
Default I'm trying to simulate the mot
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Srinath Madhavan (a.k.a pUl|)
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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!
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Old   September 11, 2007, 21:24
Default Hi, Did you plot the result
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Pei-Ying Hsieh
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Hi,

Did you plot the results to check if the results are reasonable? Do you have surface tension turned on?

pei
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Old   September 11, 2007, 21:28
Default Yup, results look reasonable.
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Srinath Madhavan (a.k.a pUl|)
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Yup, results look reasonable. Surface tension is defined in transportProperties. How is it turned on?
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Old   September 13, 2007, 11:37
Default Hi, Any luck? If not, you
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Pei-Ying Hsieh
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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
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Old   September 13, 2007, 13:33
Default Hi Pei, I am running a slig
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Srinath Madhavan (a.k.a pUl|)
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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.
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Old   December 9, 2013, 01:19
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Nazanin
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Quote:
Originally Posted by msrinath80 View Post
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....
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