Learning Forum

[mrmogan]

SIR I want to change the VELOCITY INLET of a fluid in a pipe  FROM 1 m/s TO 2 m/s (from 1.0, 1.1, 1.2, 1.3,1.4, 1.5, 1.6, 1.7, 1.8, 1.9. 2.0 m/s.). FOR EACH VALUE OF INLET VELOCITY,  CALCULATION TO BE DONE Please guide me to write USER DEFINED FUNCTION   in FLUENT   to achieve this. thanks Mogan

[Vishal Ganore]

It could be solved without using UDF. Define inlet velocity as input parameter, initialize and then define output parameter in Fluent. Come back to Workbench and provide inlet velocity values and update all design points to get output values. 

 

 

 

 

 

 

[Raef.Kobeissi]

In addition to what Vishal has posted, if you're still interested in adding a udf, you can have a look at this tutorial:

https://www.youtube.com/watch?v=LQ2y0sIXgio

 

[vighnesh]

Hello there,

I have an issue similar to this. What I need is how can i write a UDF program so that all the variable parameters are addressed in one program i.e calculate pressure1-pressure2 ( 2 points are created in the pipe as p1 and p2) with varing inlet velocity for regular interval of time say for first 100 sec velocity is v1 next 100 sec velocity is v2 and so on for 2000sec.Once done need to import all these value to an excel file Having column name as 1.Time 2.Inlet velocity of fluid 3.P1-P2 

any comments or data materials will help..

 

Thanks.

[Rob]

Please keep comments to one thread otherwise you're duplicating work.  As you've also asked in /forum/forums/topic/udf-program-for-calculating-the-pressure/  I'll lock this thread.