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

potential energy& static enthalpy in buoyant flow

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 3, 2006, 10:05
Default potential energy& static enthalpy in buoyant flow
Posts: n/a
I solve for the flow with buoyancy effect. The reference pressure is 1 atm. I was wondering the things as follows: 1. The absolute pressure is the sum of 1atm, rho*g*h, and the pressure which is the output from CFX-Post. Am I right? 2. In case of vertical flow in a long constant area duct without heat or work transfer, I found that static enthalpy change is near zero while potential energy change is very big. So the sum of static enthalpy change and potential energy change cannot be zero. Then I suspect that, for the flow with buoyancy effect, the static enthalpy, that is the output from CFX Post, already plus the potential energy, g*h. Is that right? Thank you for your kind consideration.
  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
I have a problem with the sign of mass flow rate Enthalpy behrang2009 FLUENT 0 June 6, 2010 18:02
Mean flow kinetic energy Jenny CFX 3 November 19, 2008 20:12
Enthalpy for Energy Daniel Main CFD Forum 2 October 21, 2005 17:51
Question on 3D potential flow Adrin Gharakhani Main CFD Forum 13 June 21, 1999 05:18
Why FVM for high-Re flows? Zhong Lei Main CFD Forum 23 May 14, 1999 13:22

All times are GMT -4. The time now is 09:42.