Creating a user-defined funtion

mathewg · February 4, 2012, 11:54

Hi,
I'm simulating a flow in a T-junction. So for the inlet flow at a branch I have to add an oscillation with the velocity. I'm fairly new to FLUENT.

The oscillation function is as follows:

aSin( $\omega$ t)

How would I go about creating a UDF to implement that?

Vitaly · February 14, 2012, 18:36

You need to do some of the basics tutorials on UDF's to get a fee for it.

Try this one: http://202.118.250.111:8080/fluent/F...udf/node15.htm

Then, the only difference with yours is that you will need to get the "time" every instance you call the UDF. You can do that with...

real t_glob = RP_Get_Real("flow-time");

Good Luck!

February 4, 2012, 11:54	Creating a user-defined funtion	#1
mathewg New Member GM Join Date: Feb 2012 Posts: 1 Rep Power: 0	Hi, I'm simulating a flow in a T-junction. So for the inlet flow at a branch I have to add an oscillation with the velocity. I'm fairly new to FLUENT. The oscillation function is as follows: aSin( $\omega$ t) How would I go about creating a UDF to implement that?

February 14, 2012, 18:36		#2
Vitaly Member Vitaly Join Date: Jan 2012 Posts: 32 Rep Power: 14	You need to do some of the basics tutorials on UDF's to get a fee for it. Try this one: http://202.118.250.111:8080/fluent/F...udf/node15.htm Then, the only difference with yours is that you will need to get the "time" every instance you call the UDF. You can do that with... real t_glob = RP_Get_Real("flow-time"); Good Luck! PranjalNewton likes this.

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