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TOPIC: how to improve the caculation speed

how to improve the caculation speed 10 years 1 month ago #14458

  • zqzuoan
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hi,all

I set-up a two-dimensional model,but it's caculation speed is too slow,how can I improve the speed?Attached my cas file below.

thx~
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how to improve the caculation speed 10 years 1 month ago #14459

  • c.coulet
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Hi

How could you say the calculation speed is too slow?
What is your reference?

The speed depends on various parameter and there is no general answers for such questions.
This depends on the computer (processor, memory...), the size of model (number of nodes), the physical problem (dam break, flood, tide, ...) and the parametrization (using K-Eps for turbulence cost much more than constant viscosity for example)

Regards
Christophe
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how to improve the caculation speed 10 years 1 month ago #14460

  • zqzuoan
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I have 42552 nodes,my model donnot have any physical problem,and my turbulence model=4,SMAGORINSKI model,it didnot show error,but when after 3 hours' calculation,it has no response,it stopped in 3 hours without error hint.Can you help me take a look?
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how to improve the caculation speed 10 years 1 month ago #14461

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Could we have a copy of the listing file?
Christophe
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how to improve the caculation speed 10 years 1 month ago #14462

  • zqzuoan
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the case file?
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how to improve the caculation speed 10 years 1 month ago #14464

  • c.coulet
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No the listing file!
The copy of all prints in the windows where the computation run.
option -s when you run the simulation...

Did you read the manual before using Telemac?
Christophe
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how to improve the caculation speed 10 years 1 month ago #14465

  • zqzuoan
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sorry~I just forget it.
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how to improve the caculation speed 10 years 1 month ago #14463

  • jmhervouet
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Hello,

There is certainly a problem in your computation and it probably stops somewhere. Instead of setting output periods of 180 you can start with periods of 1, and ask only 10 time steps, to see what goes wrong and where you have problems, e.g. it will tell you the number of iterations of iterative solvers that will allow to choose an acceptable time step.
regards,

JMH
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how to improve the caculation speed 10 years 1 month ago #14466

  • zqzuoan
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I will try,thank you very much
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