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Forum: Fluent UDF and Scheme Programming

May 14, 2009, 16:40

Replies: 8

How to make a UDF to have a velocity profile in a square channel

Views: 13,029

Posted By Daniel Tanner

Sorry if I was unclear! Firstly, you set...

Sorry if I was unclear!

Firstly, you set x[0] = 0.07 but it does not appear in your equation for the profile! If you wish to insert it then you can just insert 0.07 directly, i.e., (10*x[1])+1 is...

Forum: Fluent UDF and Scheme Programming

May 13, 2009, 11:01

Replies: 8

How to make a UDF to have a velocity profile in a square channel

Views: 13,029

Posted By Daniel Tanner

See the example below! This will write a profile...

See the example below! This will write a profile to the inlet face. For a velocity inlet boundary condition this is effectively setting a velocity at each inlet element as a function of the x*y*z...

Forum: Fluent UDF and Scheme Programming

May 13, 2009, 10:55

Replies: 8

How to make a UDF to have a velocity profile in a square channel

Views: 13,029

Posted By Daniel Tanner

Some quick observations: 1) the "int i;"...

Some quick observations:

1) the "int i;" command must come at the start with the rest of the declared variables (i.e., x, y, z ...)
2) all lines must finish with ";"
3) better to use x[0], x[1]...

Forum: Fluent UDF and Scheme Programming

May 12, 2009, 16:03

Replies: 8

How to make a UDF to have a velocity profile in a square channel

Views: 13,029

Posted By Daniel Tanner

The UDF looks ok, though I think you are not...

The UDF looks ok, though I think you are not understanding the UDF or "position vector" fully.
begin_f_loop(f, thread) is used to loop over every element (face) on the inflow boundary.
...

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