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Old   November 3, 2006, 01:02
Default baseball trouble
  #1
skander
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Hi all, Some of you may have been following my troubles, curious what else you have to say. I am continuing to pursue the solution to my baseball problem, however I cannot seem to make the flow actually flow around the ball, it seems to go straight through it, the ball has no effect on the field flow. I have defined the ball with a wall boundary condition, and everything that I am doing makes sense. My duct is 120x60x60, my ball has radius 2. Velocity inlet is 20m/s and I use air, ideal gas as the fluid. Pressure at the pressure outlet is zero. In addition, I occasionally (not always) get the following error: Error: divergence detected in AMG solver: temperature Error Object: () I realize I am a beginner at this, however, I really don't think this should be this hard. I use the default solver settings with Spalart-Almaras viscousity, nothing special. Any advice for a novice would be appreciated.
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Old   November 3, 2006, 03:51
Default Re: baseball trouble
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Razvan
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With your permission, I could prepare a sample case for you, so you should be able to figure it out yourself. Is that OK?

Razvan
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Old   November 3, 2006, 06:49
Default Re: baseball trouble
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sam
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1 Use coupled solver. 2. Courant number intially to 0.5 3. First order upwind then switch to 2nd order upwind.

thats all.

If problem still exists write more detials with new configuration

regards
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Old   November 3, 2006, 08:34
Default Re: baseball trouble
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Michael B
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Try this mesh. It should work fine. I'm running it at the moment. (I was curious on the case)

http://www.yousendit.com/transfer.ph...id=OTT+GvabQa8=

Michael Bo
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Old   November 3, 2006, 12:57
Default Re: baseball trouble
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skander
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Razvan, if you have the time and the heart, I really appreciate it. Thank you. You can email me at s-spies-1@northwestern.edu best Skander
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Old   November 3, 2006, 16:55
Default Re: baseball trouble
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Razvan
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I sent you something at that mail adress. I hope it will be of real help to you.

Razvan
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