# Partial pressure calculation in fluent

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Display Modes
 February 4, 2008, 15:04 Partial pressure calculation in fluent #1 Priya Guest   Posts: n/a Hello All, I have Species reaction taking place in a fuel cell volume and would like to calculate the partial pressure for each individual species (essential for calculation of nernst potential.) Any suggestions ?? Thank you!

 February 5, 2008, 04:50 Re: Partial pressure calculation in fluent #2 BG Guest   Posts: n/a Partial pressure is (molar fraction)*(absolute pressure), both are Fluent field functions available for processing. You can do it automatically with a custom field function.

 February 5, 2008, 11:51 Re: Partial pressure calculation in fluent #3 Priya Guest   Posts: n/a Thanks BG! But is there a macro that can be used to get the molar fraction. My partial pressure term is part of a UDF and I need to calculate it at every iteration. I know that C_YI(c,t,i) is used for mass fraction, but I could not find one for molar fraction.

 February 5, 2008, 12:55 Re: Partial pressure calculation in fluent #4 PKN Guest   Posts: n/a probably, we can use molecular Weight to convert mass fraction to molar fraction....

 February 7, 2008, 15:42 Re: Partial pressure calculation in fluent #5 Priya Guest   Posts: n/a Thank you guys for the help. I used the mass fraction and molecular weight to get to the partial pressures and I think it worked well

 December 5, 2010, 15:03 UDF:Partial Pressure calcualtion of species in gas seperation thry membranes. #6 New Member   Azharuddin Join Date: Jan 2010 Posts: 3 Rep Power: 7 I'm solving a case for gas seperation through membrane in which i need to calculate the partial pressure of each species as permeation is depended on partial pressure in my case. To calculate my mass flux rate thru membrane I need partial pressure. Can anybody help me in calculating partial pressure of species thru UDF. thanks a ton I'M IN URGENT NEED OF IT, PLZ HELP

 May 29, 2011, 11:03 partial pressure #7 New Member   sabrine Join Date: May 2011 Posts: 1 Rep Power: 0 I have a surface aerated stirred tank. I need to calculate the volumetric mass transfer coefficient Kla. Is there any way to determine the partial pressure of the air incorporated in the water knowing that there is always a quantity non incorporated of air above the surface? Otherwise how can i just know the concentration of the air incorporated in the water using Fluent?

 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 Wijaya FLUENT 14 August 26, 2015 06:02 rakadit FLUENT 0 June 6, 2011 02:13 Mattia FLUENT 0 October 22, 2007 08:52 Maharba FLUENT 2 June 29, 2007 01:14 yu chun FLUENT 1 May 18, 2004 03:40

All times are GMT -4. The time now is 22:46.

 Contact Us - CFD Online - Top