# How to get the total pressure in the UDF?

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

 September 12, 2012, 05:50 How to get the total pressure in the UDF? #1 New Member   Zhi-Gang Zhai Join Date: Sep 2012 Location: karlsruhe, Germany Posts: 7 Rep Power: 4 Hello all: My case is incompressible single phase flow, and I want to get the total pressure and static pressure of some nodes. But the C_P could only get the static pressure, but how to get the total pressure in the UDF? Thank you very much. BTW: i search a very old thread that said the fluent interior data structure. The total pressure is the 'derived' term, not the 'variable'. So it can not be got , should be calculated by 'total pressure = static pressure + operation pressure + 0.5*rho*v*v '. but I find the true case is not like this. I use the PLOT to print out the total pressure, dynamic pressure and static pressure. The total pressure from the PLOT is bigger than the calculated total pressure with the above formula. I guess maybe there is a coefficient before the '0.5*rho*v*v' .

 September 12, 2012, 06:02 #2 Senior Member     Daniele Join Date: Oct 2010 Location: Italy Posts: 902 Rep Power: 15 Hi, have you read this thread? static vs. total pressure

 September 12, 2012, 06:15 #3 New Member   Zhi-Gang Zhai Join Date: Sep 2012 Location: karlsruhe, Germany Posts: 7 Rep Power: 4 thanks to ghost82. I have read this thread. But I think the conclusion is not clear. if total pressure = static pressure + operation pressure + dynamic pressure, my question still exists . Thank you again.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post saisanthoshm88 CFX 1 August 9, 2012 06:13 khoopes FLUENT 0 August 2, 2012 12:24 anveshkadimi FLUENT 0 July 20, 2012 13:19 famarcfd CFX 0 June 17, 2011 10:33 Atit Koonsrisuk CFX 0 January 1, 2005 06:46

All times are GMT -4. The time now is 22:26.