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

Boundary conditions in a pipe

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 28, 2021, 05:27
Unhappy Boundary conditions in a pipe
  #1
New Member
 
Daria
Join Date: Feb 2021
Posts: 1
Rep Power: 0
sadzikk is on a distinguished road
Dear All,
I'm trying to proceed the simulation in a syphon. I'd like it to be transient simulation of two fluid - water and air. I tried to set opening in inlet with mass and momentum option - opening pres. and dirn and the same option for outlet but there is a warning "the solver failed with a non-zero exit code:2". The same warning occurs when I tried to set opening in inlet and boundary type in outlet. I have no idea where is a problem and how to fix i :<
sadzikk is offline   Reply With Quote

Old   February 28, 2021, 06:23
Default
  #2
Senior Member
 
Sasan Ghomi
Join Date: Sep 2012
Location: Denmark
Posts: 287
Rep Power: 11
sasanghomi is on a distinguished road
Hi,

Why are you using Opening Boundary condition in Inlet Boundary? Switch to Inlet B.C and fix the mass flow rate. Also, it is better not to force the direction of flow in the outlet boundary condition.
__________________
Best Regards
Sasan Ghomi
sasanghomi is offline   Reply With Quote

Old   February 28, 2021, 08:20
Default
  #3
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,335
Rep Power: 20
Gert-Jan will become famous soon enough
This is not a simple calcultion. The boundary orientation and ssecification need to be defined with great care. So, please show the exact geometry and your BC settings (= upload the output file).
Gert-Jan is offline   Reply With Quote

Reply

Tags
boundary condition, cfx, transient 2d

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wrong multiphase flow at rotating interface Sanyo CFX 14 February 7, 2017 17:19
sliding mesh problem in CFX Saima CFX 45 September 22, 2015 10:53
Wrong flow in ratating domain problem Sanyo CFX 17 August 15, 2015 06:20
Question about heat transfer coefficient setting for CFX Anna Tian CFX 1 June 16, 2013 06:28
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 04:05


All times are GMT -4. The time now is 00:43.