CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

modified pressure boundary

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 16, 2002, 06:00
Default modified pressure boundary
  #1
Rhydar
Guest
 
Posts: n/a
Hello anyone.. I am having some difficulties with pressure boundaries, 5000m high. I have an 'open' boundary attempting to model possible in/outflow from the atmosphere. I am using a pressure boundary. I use usrbcs to specifiy variable pressure and temperature at dry adiabatic lapse rate. The pressure however is modified: buoyancy, momentum and eddy viscosity modification (according to the manual). 1)Is this assumption correct? 2)I am not sure of the user fortran for the effective viscosity or the divergence term in the momentum transfer modfication, or the k term in the viscosity modification, has anyone had a similar problem with this kind of boundary? 3)Would they mind spreading some joy my way?
  Reply With Quote

Reply

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
stagnation pressure boundary problem mbgnfrx2 STAR-CD 2 November 26, 2012 00:55
Boundary Conditions : Total Pressure or Velocity Gearb0x OpenFOAM Running, Solving & CFD 2 February 28, 2011 22:18
Proper Pressure Boundary Conditions for Buoyant Flow mchurchf OpenFOAM 0 March 25, 2010 13:16
Hydrostatic pressure in 2-phase flow modeling (CFX4.2) HB &DS CFX 0 January 9, 2000 14:19
Pressure boundary condition C-H Kuo Main CFD Forum 9 August 28, 1998 12:07


All times are GMT -4. The time now is 15:51.