CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

DPM Boundary Conditions, UDF

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   November 10, 2005, 13:28
Default DPM Boundary Conditions, UDF
Posts: n/a
Hi there!!!

I am trying to simulate the deposition of inert dust particles through pipes. The boundary conditions offered by the DPM model on walls are just trap or reflect. I would like to set a user defined boundary condition so that all particles initially reflect on walls but, after this reflection, if the particle has a velocity that runs perpendicular to the wall lower than a prefixed value, the boundary condition changes and the particle is recorded as trapped. Can anybody help me with this problem?

Thanks a lot in advance!!!!


  Reply With Quote

Old   November 11, 2005, 15:37
Default Re: DPM Boundary Conditions, UDF
Allan Walsh
Posts: n/a
In theory, you could do this with a UDF, but if you don't have any experience in working with UDF's it could take 1 to 2 weeks of time to write and test it.

An alternative would be to use the tangential coefficent of restitution in the wall boundary condition. By playing with this value, and perhaps applying different values at different locations, you may be able achieve what you want much more quickly.
  Reply With Quote


Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Domain Imbalance HMR CFX 5 October 10, 2016 05:57
Boundary conditions by UDF s.sami Fluent UDF and Scheme Programming 0 August 23, 2010 11:30
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 05:05
Accessing boundary conditions from UDF _svl FLUENT 0 October 5, 2005 08:28
A problem about setting boundary conditions lyang Main CFD Forum 0 September 19, 1999 18:29

All times are GMT -4. The time now is 08:31.