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Max value of a transient parameter

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Old   May 15, 2016, 10:47
Default Max value of a transient parameter
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Ahmad
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Hi,
I'm trying to optimize a specific parameter obtained from CFX, using genetic algorithm.
when I run a transient problem I can only check the result for different time steps using time step selector manually.
How can I write an Expression to obtain the max value of a parameter between all transient results at a location automatically?

I need this Expression for the input of my genetic algorithm

thank you.
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Old   May 17, 2016, 02:35
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Maxim
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one idea: write an expression ( maxValue(variable)@location) and use this expression as a monitor. You can easily export those values via right-click from the solver manager's monitor or with a script cfx5mondata.
If you don't know how do create those things, please have a look at the documentation or use the search function in this forum

In case you already have a lot of *.trn files - you could write a script that loops through all those files and gets the values. But since I haven't done that before, I'm not sure exactly how that works.
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Old   May 17, 2016, 12:52
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Quote:
Originally Posted by -Maxim- View Post
one idea: write an expression ( maxValue(variable)@location) and use this expression as a monitor. You can easily export those values via right-click from the solver manager's monitor or with a script cfx5mondata.
If you don't know how do create those things, please have a look at the documentation or use the search function in this forum

In case you already have a lot of *.trn files - you could write a script that loops through all those files and gets the values. But since I haven't done that before, I'm not sure exactly how that works.
Thanks a lot Maxim. my problem exactly is how to write a script to loop through my results automatically and give the maximum value automatically to genetic algorithm. I don't want to save the plot manually and check the maximum value myself.
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Old   May 18, 2016, 02:05
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have you searched this forum for scripting ideas? In case you didn't set up any monitor points, you'll have to loop through all your trn files.

those are the first 3 search results:
http://www.cfd-online.com/Forums/cfx...-file-csv.html
http://www.cfd-online.com/Forums/cfx...lem-macro.html
http://www.cfd-online.com/Forums/cfx...ding-halt.html

As soon as you have written some code, the guys here can probably help debugging in case you will still have problems. good luck
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