CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

User Defined Non Reflecting Boundary Condition

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes
  • 1 Post By Tengc

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 17, 2004, 05:55
Default User Defined Non Reflecting Boundary Condition
  #1
Tengc
Guest
 
Posts: n/a
HI folks

I simulate a case with a shockwave in water. With 6.2.5 segregated solver (the new solution from fluent) or a udf-based 6.1.22 coupled imp solution. In both the problem is 2d, dp, compressible, unsteady. All shockwaves reflecting at the pressure-outlet boundary. Now I need to programm a NRBC (nonreflecting-BC) with UDF. My idea is that I read the Face-Pressure out in every BC-Face, invert it and write back to clean the reflection. I just need to see what happen in the closed case and each wave which leaves the boundary should not get reflected.

Thx for ur ideas Christian Tenger, Fachhochschule Biel Schweiz
Sanda likes this.
  Reply With Quote

Old   November 17, 2004, 13:58
Default Re: User Defined Non Reflecting Boundary Condition
  #2
Luca
Guest
 
Posts: n/a
A simple question...how can you set the value of the pressure you want? i'm really interested the way you do it. thanks Luca
  Reply With Quote

Old   November 9, 2021, 04:18
Default
  #3
New Member
 
Sanda
Join Date: Apr 2021
Posts: 4
Rep Power: 5
Sanda is on a distinguished road
Dear Tengc,
Did you able to solve it? If you got the udf, can you please share it?
Sanda is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wind turbine simulation Saturn CFX 58 July 3, 2020 01:13
Display boundary condition defined by UDFs trantoan2008 Fluent UDF and Scheme Programming 8 February 21, 2011 06:24
How exactly the "pressure outlet" bdry condition compute properties on the boundary? yating9901 FLUENT 3 June 28, 2010 12:26
Boundary condition using user subroutine wei Siemens 0 July 6, 2009 10:47
Partially reflecting boundary condition Rachel FLUENT 1 July 1, 2008 18:20


All times are GMT -4. The time now is 02:55.