Learning Forum

[DEBA]

HELLO SIR HOW TO WRITE UDF FOR FOLLOWING PR. GRADIENT PLEASE HELP ME 

I HAVE ATTACHED ONE IMAGE FILE

[mli]

We have UDF training material and tutorials to help you get started. Let us know if you do not have access.

[DEBA]

No sir I have not that material.Please sir help me writing this equation . Please  also provide this material.

[raul.raghav]

Refer to the following example from the Fluent UDF Manual. See attached screenshot of the Ansys Help Viewer:

Raef also has a video on pressure inlet condition using a UDF:

CFD ANSYS Tutorial – Variable Transient Inlet Boundary condition using a UDF | FLUENT

[Amine Ben Hadj Ali]

Removing the links to sharcnet. Please refer to the ANSYS online help which is accessible for students.

[DEBA]

 ANY ONE PLEASE SIR HELP . THIS IS URGENT SIR

[DEBA]

THIS IS KNOWN TO ME BUT IS THER ANY METHOD FOR DEFINING PRESSURE GRADIENT

[Rob]

As has been posted in response to other questions, the UDF manual is a good starting point, and from there you will need a DEFINE_PROFILE to set the pressure. You are also not defining a pressure gradient, Fluent will calculate that, you need to define the inlet pressure, and possibly the outlet depending on what you're modelling. Given blood is incompressible, I'd consider using a velocity boundary, again referring to the UDF manual and DEFINE_PROFILE  example. 

[DEBA]

SIR I HAVE WRITTEN ONE UDF CODE BUT GETTING ERROR 

ERROR IS fluent/14.0.0/src/dual_cell.h:line 1 : parse error.

I WILL ATTACH MY UDF FILE

[Amine Ben Hadj Ali]

You need definitely to attend a basic C workshop and UDF training. "mu" is not defined and there is line missing ";". That was exception looking into your UDF.