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

Surface Reaction Rate, surface concentration.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 4, 2012, 14:00
Default Surface Reaction Rate, surface concentration.
  #1
New Member
 
Marcus
Join Date: Mar 2012
Posts: 6
Rep Power: 5
MarcusW is on a distinguished road
Hi,

I'm using DEFINE_SR_RATE to control the rate of deposition of a species onto a surface. Basically:

DEFINE_SR_RATE(surf_rate,f,fthread,r,mw,yi,rr)
{
....
*rr = C_UDMI(c, t, SS) * k_rs * 1056 * yi[0] / mw[0];
}

where C_UDMI(c, t, SS) is the fraction of surface available.

What exactly is passed to the function for yi[0] ??

The manual says: "Pointer to array of mass fractions of gas species at the surface and the coverage of site species (or site fractions)" but I don't think it is the mass fraction since F_YI(f, fthread, 0) and C_YI(c, t, 0) both return the mass fraction but yi[0] returns a number greater than those.

Here species[0] is the species which gets deposited and species[1] (recorded elsewhere) is the deposited species.

The reaction is simply: species[0] -> species[1].

Thanks
MarcusW is offline   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
[ICEM] Problems with coedge curves and surfaces tommymoose ANSYS Meshing & Geometry 0 August 5, 2011 16:02
Segmentation fault in running alternateSteadyReactingFoam,why? NewKid OpenFOAM 18 January 20, 2011 17:55
surface reaction rate with udf yellow-stuff FLUENT 4 January 29, 2010 13:53
Surface reaction rate Jon FLUENT 5 December 19, 2007 08:01
surface reaction Jason FLUENT 0 September 26, 2003 12:29


All times are GMT -4. The time now is 11:07.