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

Head pressure loses problem.......

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 24, 2008, 16:04
Default Head pressure loses problem.......
  #1
krecki
Guest
 
Posts: n/a
Hi all. I'm new in CFX Could you advise me please how should i set my BC to work out the head pressure loses in my simulation? I have a valve geometry inside simulation and have tried to set transient type of simulation. My initial boundary condisions were set all for zeros ( pressure , velocity) and my inlet pressure was set to 1000[Pa] , Outlet was set to 0[Pa], reference pressure was set to 0[Pa] . With BC set like that my results didn't capture any pressure drop on inlet side. It was constantly 1000[Pa] thru the 30[s] period which i set in transient simulation with 1[s] timestep. I'll be gratefull for advice.

Regards

Tom
  Reply With Quote

Old   March 25, 2008, 18:46
Default Re: Head pressure loses problem.......
  #2
Steven
Guest
 
Posts: n/a
How have you set the conditions of the walls? They should be set with a value of <no slip> to simulate the friction of teh pipe walls? Cant be sure form your description but you could be pumping through a frictionless pipe!? Either that or youve invented the best pipe ever

Steve
  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
Pressure calculation problem maolongliu OpenFOAM 1 August 15, 2010 08:05
pressure gradient term in low speed flow Atit Koonsrisuk Main CFD Forum 2 January 10, 2002 11:52
Hydrostatic pressure in 2-phase flow modeling (CFX4.2) HB &DS CFX 0 January 9, 2000 14:19
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 16:00


All times are GMT -4. The time now is 03:27.