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Running a UDF only once per timestep

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Old   July 5, 2012, 06:00
Default Running a UDF only once per timestep
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Alex
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Is there any possibility to tun a UDF (like DEFINE_SOURCE for example) only ONCE every timestep and not on every iteration?
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Old   July 6, 2012, 04:03
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Daniel Tanner
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Try this:

if ( first_iteration )
{
enter your calculations here
}

I got this from:
http://willem.engen.nl/uni/fluent/do...ips-Tricks.pdf

Let me know how it goes.
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Old   July 6, 2012, 07:57
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Either what Daniel suggested or you can use the macro EXECUTE_AT_END. Depends on your need, whether you want to execute at beginning or at the end of a time-step.

DEFINE_EXECUTE_AT_END(name)
{
...
}

DEFINE_EXECUTE_AT_END is a general-purpose macro that is executed at the end of an iteration in a steady state run, or at the end of a time step in a transient run.

https://www.sharcnet.ca/Software/Flu...udf/node22.htm
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