CFD Online Logo CFD Online URL
Home > Forums > FLUENT

species deposition or wall reaction ?

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

Like Tree1Likes
  • 1 Post By gianfilippo

LinkBack Thread Tools Display Modes
Old   July 2, 2007, 08:05
Default species deposition or wall reaction ?
Posts: n/a

I want to model a species deposition problem. A fluid carries species A along a wall. Species A deposits/is adsorbed/reacts at the wall. The deposition/adsorption/reaction rate is modelled like 1st order reaction.

It seems that there are different options:

1) species transport + surface chemistry;


Do I have to define both A(site) and A(solid) with

a reaction scheme like

A(solution) --> A(site)

A(site) --> A(solid)


Can I define only A(site) with

a reaction scheme like

A(solution) --> A(site) ?

What would be the site dednsity ?

Would the reaction be like

Obviously I did not find the surface chemistry

tutorial very helpful.

2) UDS + UDE flux at the wall;


Should I use DEFINE_PROFILE, returning

flux = -k F_UDSI(f,t,i) and

read it in the wall BC's (flux) for the UDS

3) define a volume sink close to the wall.

engineer.iman likes this.
  Reply With Quote

Old   July 5, 2007, 05:35
Default Re: species deposition or wall reaction ?
Posts: n/a

can anyone comment on my message ?

Is it so obvious ?


  Reply With Quote

Old   August 21, 2012, 13:19
Default The same Problem
New Member
Join Date: Jan 2012
Location: U.S
Posts: 9
Rep Power: 5
Pouria is on a distinguished road
I have the same problem and I am trying to implement the second option.

I get negative species fraction (UDS value) at the wall. Any suggestion?
Pouria is offline   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
tmerge utility creates unwanted interface/walls comes in the final mesh OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 11 January 20, 2012 07:23
Catalytic reaction on the wall jszl CFX 0 January 11, 2010 05:22
Wall deposition of liquid droplets kUh CFX 0 January 22, 2008 02:20
species source term reaction Andrew FLUENT 3 May 27, 2005 12:35
Wall functions Abhijit Tilak Main CFD Forum 6 February 5, 1999 02:16

All times are GMT -4. The time now is 09:42.