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Old   February 21, 2006, 06:29
Default Different Physical time steps selection
  #1
siv
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Hi All, I have one question regarding Physical time step selection. I want to use small physical time step for first few iterations and bigger time step after cetain no.of iterations in a single run. Is it possible to do like in Transient simulation?

Thank you.

Regards, siv
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Old   February 21, 2006, 10:03
Default Re: Different Physical time steps selection
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Neale
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Yes, simply type in a list of timesteps you want to use.

eg: 0.2 [s], 0.2 [s], 0.2 [s], 1.0 [s], 1.0 [s], ...

I think there is a short form as well.

0.2*3 [s], 1.0 [s], ...
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Old   February 21, 2006, 14:35
Default Re: Different Physical time steps selection
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siv
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Hello Neale i want to use in steady state simulation not in transient simulation. In transient simulation its possible but i dont know how to define for steady state simulations.
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Old   February 22, 2006, 03:18
Default Re: Different Physical time steps selection
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hdj
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Hi, it is possible with CEL expression. Take a look at function "citern" in CFX help.

Best regards
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Old   February 22, 2006, 10:55
Default Re: Different Physical time steps selection
  #5
Jianping Zhang
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Hi,

The method Neale introduced works for both transient and steady state problems.

Regards!

Jianping
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Old   February 23, 2006, 12:42
Default Re: Different Physical time steps selection
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Forrest
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Or, you can Edit Run in Progress, by this way you can increase physical timestep whenever you feel you should do so (sure you need to be present to do this, ^_^)

Regards, Forrest
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