Learning Forum

[Shak]

Hello,

I need to specify a boundary condition at the inlet region of a 3D pipe.

At the inlet, I want to specify a fully developed velocity profile using UDF.

Please, could someone give me information about this?

Thank you.

[Rahul]

Hi,

Please refer 8.2. Detailed UDF Examples (ansys.com) the information from UDF manual.

Hope this helps you.

regards,

[Amine Ben Hadj Ali]

You can aslo consider using Fluent Expressions instead of UDF as alternative. Example is availble in Fluent User's Guide.

 

5.4. Expression Examples (ansys.com)

[Shak]

Hello Sirs,
First, thank you very much for answering me.
I am currently modeling a fluid of solid particles and air with those characteristics:
Particle --> diameter 0.0002m
Volume fraction--> 0.0012
Specularity coefficient --> 0.002
Pressure gradient --> 198.56 Pa/m

I am using the DDPM model, but I still have some doubts:

- How could I enter the volume fraction? (I only find the option of total mass flow rate)

- How could I enter the pressure gradient? (I only see the option for Initial pressure)

- How could I enter the coefficient of restitution between the particles and the wall? 

Thanks.

[Amine Ben Hadj Ali]

What has your new question with the thread? Please open a new thread.

[Shak]

Ok Sr thank you, I will do that.