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

Help for setting 3D boundary condition in compressing water vapor

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 27, 2009, 16:05
Default Help for setting 3D boundary condition in compressing water vapor
New Member
Join Date: Jul 2009
Posts: 2
Rep Power: 0
sogolf is on a distinguished road
Dear all here,
I am a beginner to simulate 3D single stage axial compressor compressing water vapor under vacuum but got some difficulties with the boundary condition setting.

Known values I have are, compressor inlet total pressure (970Pa), mass flow rate, inlet total temperature and compressor's geometric size, blade rotating rpm. What I want to calculate out is, outlet total pressure, temperature. When I am using Fluent for the calculation, I have some points not clear:

1) should I set operating pressure to be 0? I understand the absolute pressure would be added based on this operating pressure and if I put 0 in operating pressure but put gauge pressure in inlet gauge pressure, it should be fine, am my understanding right?

2) I set inlet as mass flow rate, according to my understand to gauge pressure, I put the total inlet pressure value into initial gauge pressure, is it right?

3) I am not sure how to set up outlet, outlet pressure might be right choice, but I have little idea what I should do with the gauge pressure, should it be the static pressure as the same value as inlet?

4) To make pressure convergence, should I set pressure desensitization as standard mode?

Could some one here give me some advise? that would be highly appreciated.
BTW, the flow would be sub-sonic.
Thanks advance.

Last edited by sogolf; September 27, 2009 at 22:54.
sogolf is offline   Reply With Quote


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
inlet velocity boundary condition murali CFX 5 August 3, 2012 09:56
outlet boundary condition Nina Schiepel CFX 2 July 12, 2008 16:27
spanwiperiodic boundary condition for LES Sungho Yoon CFX 5 July 8, 2008 07:21
Calculated gradient boundary condition similar to gammaContactAngle adona058 OpenFOAM Running, Solving & CFD 0 September 26, 2007 16:23
Pressure Boundary Condition Matt Umbel Main CFD Forum 0 January 11, 2002 11:06

All times are GMT -4. The time now is 21:48.