CFD Online Logo CFD Online URL
Home > Forums > FLUENT

partial pressures of species

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

LinkBack Thread Tools Display Modes
Old   July 19, 2001, 11:56
Default partial pressures of species
Posts: n/a
Sponsored Links
hello guys,

iam writing a udf to alter the volume reaction rate and would like to use the partial pressures of species in it. can anybody please tell me if there is a way i ca access species partial pressure/mole fraction directly from the solver to use in my rate calculations. Thanks in advance guys, i would really appreciate this help. Thank you, siva
  Reply With Quote
Sponsored Links

Old   July 19, 2001, 16:06
Default Re: partial pressures of species
Posts: n/a
Fluent solves for the mass fraction of the species. Convert this to mole fraction, which is directly proportional to the partial pressure.

You can try to get the mol wt of the i_th species in your materials name list (total number of species = solver_par.nSpecies) by using solver_par.molWeight[i] in a compiled UDF...or maybe there is a more direct way since mole fraction is available from the field functions list. Check with Fluent Inc.

  Reply With Quote

Old   July 19, 2001, 16:18
Default Re: partial pressures of species:to lanre
Posts: n/a
thanks lanre. can i use the molweight macro only in a compiled udf, can i use it in a interpreted udf, coz im unable to setup my compiled udf library-im faced with a problem-while i follow the procedure given in manuals, i keep getting the error message: language optional software package not installed-do u think ur familiar with this problem, if so can u please help me. thanks a lot in advance. siva
  Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Modelling Biomass Combustion via Species Transport Racheal FLUENT 29 June 17, 2017 00:04
Species order fluent Raddi FLUENT 1 March 13, 2009 01:21
mass fraction of species Ahmed FLUENT 0 April 18, 2007 11:57
Species Partial Pressure or Mole Fraction Priya FLUENT 2 July 25, 2006 09:21
How to specify surface flux of a species? ked FLUENT 16 February 9, 2006 21:14

Sponsored Links

All times are GMT -4. The time now is 04:16.