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Postprocessing using min and max in a given time interval

Posted Dec 5, 2011, 1:21 p.m. EST Results & Visualization Version 4.2a 2 Replies

Eric Laurenz
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Hello!

I have a very simple post-processing problem for time dependent simulation, but got stuck and couldn't find a way to solve it.

I just need to evaluate the difference between the min and max value of a scalar variable within a given time interval. This difference should then be stored in a table for export. All I found was to evaluate either the max value or the min value (or both, next to each other) but no way to tell Comsol to subtract one from the other...

I also found the two new post-processing functions timeint and timeav in 4.2a, but nothing like timemax or timemin.

Any idea?

Cheers,
Eric
2 Replies Last Post Dec 6, 2017, 9:17 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Dec 10, 2011, 12:50 p.m. EST
Hi

I'm afraid the easiest is to dump the max an ins in a table and use excel, or export the results to matlab.

But the timemin() and timemax() could be handy indeed ;) perhaps you should suggest them to support

--
Good luck
Ivar
Hi I'm afraid the easiest is to dump the max an ins in a table and use excel, or export the results to matlab. But the timemin() and timemax() could be handy indeed ;) perhaps you should suggest them to support -- Good luck Ivar
Jeff Hiller COMSOL Employee

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Posted: 6 years ago Dec 6, 2017, 9:17 a.m. EST

This is an old thread, but in case someone is still wondering: the timemax and timemin operators do what you want, Eric. See Reference Manual for COMSOL Multiphysics version 5.3, page 252 for its syntax.

Best,

Jeff

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Jeff Hiller
This is an old thread, but in case someone is still wondering: the timemax and timemin operators do what you want, Eric. See Reference Manual for COMSOL Multiphysics version 5.3, page 252 for its syntax. Best, Jeff

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