CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

binary diffusion coeff.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 27, 2003, 11:07
Default binary diffusion coeff.
  #1
marc
Guest
 
Posts: n/a
I'm triying to simulate CH4-air combustion ( laminar, finite rate ): I'm searching CH4 o2 CO2 H2O vapor binary diffusion coeff. or hints about the setting of there coeff. thanks andrea
  Reply With Quote

Old   March 28, 2003, 09:09
Default Re: binary diffusion coeff.
  #2
Mads Bang
Guest
 
Posts: n/a
You can set the coefficients by using the USEDIF user fortran file. There you set the diffusivity which is the product of the effective binary diffusion coefficient and the density.

You have to calculate the effective binary diffusion coefficient from the gas concentrations and their binary diffusion coefficients. You can see a possible way of doing that in A.F. Mills, 1995, Heat and Mass transfer pp891

Best Regards, Mads
  Reply With Quote

Old   March 31, 2003, 10:10
Default Re: binary diffusion coeff.
  #3
marc
Guest
 
Posts: n/a
THANKS !!!
  Reply With Quote

Reply

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
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Error to re-open fluent case file J.Gimbun FLUENT 0 April 27, 2006 08:42
binary diffusion coefficient kevin-change FLUENT 2 October 1, 2002 06:02
Who can write the binary diffusion coefficient ?? Hsin-Ping FLUENT 1 April 15, 2002 02:22
Sliding mesh error Karl Kevala FLUENT 4 February 21, 2001 16:52


All times are GMT -4. The time now is 18:12.