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how to check absolute velocity values

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Old   May 14, 2004, 17:20
Default how to check absolute velocity values
  #1
gaurav
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Hi,

I am intrested in checking the absolute velocity values (or other parameters of interest) for each/different iteration . Can anybody help me , how to get these absolute velocity values for two successive iterations in fluent? Can we save these values before convergence/divergence is achieved.

Thanks in advance for the solution !!!

Regards Gaurav
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Old   May 16, 2004, 15:42
Default Re: how to check absolute velocity values
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Ajay
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You need to write a UDF for this using the DEFINE EXECUTE_AT_END where in you could write the values into a file. -Ajay
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Old   May 16, 2004, 17:12
Default Re: how to check absolute velocity values
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gaurav
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Hi, Thanks for the response Ajay. But I don not have experience/idea how to write that udf. Can U help me with that or tell me how to write it.

Regards, Gaurav
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Old   May 17, 2004, 05:24
Default Re: how to check absolute velocity values
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Prasad Dudhgaonkar
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Dear Gaurav

Another way can be as follows. 1) Draw a line/plane using surface menu. Go to XY plot and write values of velocity (or any property of interest) to a file. 2) Set number of iterations to 1 and iterate. 3) write values of velocity to another file.

You can compare these by using XY plot in Fluent. You can alo process the data in MS Excel or any other numerical processing program.

Hope this addresses your requirement.

Regards Prasad
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Old   May 17, 2004, 13:38
Default Re: how to check absolute velocity values
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gaurav
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thanks Prasad for the response.yea this can be one way of doing it.But i wanted to know if i can print velocity value or any other varaible of interest on fluent command window along with the residual values for each iteration.. Do u know about it if i can set it somehow in fluent ?

Regards-Gaurav
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Old   May 17, 2004, 16:38
Default Re: how to check absolute velocity values
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Prasad Dudhgaonkar
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Hi Gaurav,

You may try this. 1) Go to "Solve - Animate - Define - Display Type XY Plot". Select appropriate directory. 2) Choose surface (preferably a line) and property of interest on Y-axis. 3) You will have display of the plot which will be refreshed after every iteration. This frequency is to be set in Animation dialogue box.

Regards Prasad
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Old   May 17, 2004, 17:04
Default Re: how to check absolute velocity values
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gaurav
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Thanks once again Prasad. I will try this and see how it works. It seems i have found the solution

Regards-Gaurav
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Old   May 17, 2004, 17:07
Default Re: how to check absolute velocity values
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Prasad Dudhgaonkar
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Please try and let all others know how it worked out. Regards Prasad
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