incorrect flow pattern

ppa381 · October 22, 2009, 13:34

hello,

I am simulating a pulsating flow through a pipe. I am using a udf file for the pressure. When I run the display --> pathlines to see the flow pattern it is pulsating but the flow starts at two different points; in the middle and at the right side (inlet). I would like it to be pulsating from just the inlet.

Ibo · November 25, 2009, 08:11

Quote:

Originally Posted by ppa381

hello,

I am simulating a pulsating flow through a pipe. I am using a udf file for the pressure. When I run the display --> pathlines to see the flow pattern it is pulsating but the flow starts at two different points; in the middle and at the right side (inlet). I would like it to be pulsating from just the inlet.

Dear ppa
I hope you have solved your problem, I am facing the same problem but from the very beginning stage.
Can you kindly answer the following questions for me
· How do you simulate a pulsating flow using pressure gradient through a simple pipe
· What is the UDF file
I am really in a big need for you answer, and is very much appricated
Ibo

ppa381 · December 10, 2009, 14:07

You have to write a UDF file using DEFINE_PROFILE; Within in this UDF is a written c-program to tell fluent how to distribute the pressure. You must read over the Fluent UDF Manual and examples in order to to this.

Ibo · December 10, 2009, 15:02

Thank you PPA for your reply above

yes I could understand that. Can you please send me the .c file(s) you have used to solve the flow through the tube. My e-mail is
g.ibrahim@hotmail.co.uk

I do appreciate your help and thanks in advbance

Kindest Regards
Ibo

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December 10, 2009, 14:07		#3
ppa381 New Member Join Date: Jul 2009 Posts: 9 Rep Power: 16	You have to write a UDF file using DEFINE_PROFILE; Within in this UDF is a written c-program to tell fluent how to distribute the pressure. You must read over the Fluent UDF Manual and examples in order to to this.

December 10, 2009, 15:02		#4
Ibo New Member Ibo Join Date: May 2009 Posts: 8 Rep Power: 17	Thank you PPA for your reply above yes I could understand that. Can you please send me the .c file(s) you have used to solve the flow through the tube. My e-mail is g.ibrahim@hotmail.co.uk I do appreciate your help and thanks in advbance Kindest Regards Ibo