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

Modeling adsorption in packed beds

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 21, 2005, 08:46
Default Modeling adsorption in packed beds
  #1
Julia
Guest
 
Posts: n/a
Hi

I am modelling removal of colour from an industrial effluent using activated carbon as adsorbent.I have experimental data for colour concentration at the column exit

I want to see a break through curve of the colour as you normally expect to see in an adsorption column.

I think that Fluent expects the fluid to be present throughout the geometry at the start since we declare a fluid zone (is this point right????) In reality flow reaches the bottom of the column only after elapse of some time since the flow started at the top,so that the concentration of colour at the column exit at time t = 0 is 0

I am specifying inlet concentration of colour at the velocity-inlet boundary condition,patching the porous (fluid-zone) zone for zero concentration of the colour. I am writing a UDF for removal of colour by the adsorbent.Yet it is not working.

Any suggestions??? Thanks, Julia
  Reply With Quote

Old   July 6, 2005, 02:30
Default Re: Modeling adsorption in packed beds
  #2
Mark
Guest
 
Posts: n/a
Your problem is interesting for me.. I have similar situation.. please let me know the detail which equation you use and what approched your use in simulation.

regards,
  Reply With Quote

Old   May 12, 2013, 05:47
Default adsorption in a fixed bed and multiphase models
  #3
Member
 
soodabe
Join Date: Apr 2013
Posts: 40
Rep Power: 12
borhan_sd@yahoo.com is on a distinguished road
Hi dears

In my problem there is a fixed bed made of porous adsorbent and gas stream passes through it.

Is this manner a state of multiphase or discrete phase model in Fluent?Or not? If It is a multiphase model,which of them?(VOF or Mixture or Eullerian?)

Please help me.
borhan_sd@yahoo.com is offline   Reply With Quote

Old   May 13, 2013, 04:39
Default
  #4
Senior Member
 
A CFD free user's Avatar
 
A-A Azarafza
Join Date: Jan 2013
Posts: 226
Rep Power: 14
A CFD free user is on a distinguished road
@ soodabe
There's a tutorial in Fluent regard this. You can refer it and get some insight to start your model. But as far as I know, DPM is not applicable in your model. DPM is used when the patticles load is less than 12%. You should think of considering a large numbers of particles or considering only a few of the involved particles. Maybe you need to apply Eulerain or simpler version of it Mixture model.
__________________
Regard yours
A CFD free user is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Adsorption modeling with OpenFOAM ? _Greg_ OpenFOAM 4 May 31, 2016 03:15
Modeling Adsorption/Packed Beds Sudheendra FLUENT 4 April 21, 2013 05:09
Can Fluent predict hold-up in packed beds? Sangeetha FLUENT 1 June 11, 2011 11:27
Packed beds Shankar FLUENT 0 October 19, 2002 22:56
packed beds vijay pardeshi Main CFD Forum 0 March 9, 2000 06:05


All times are GMT -4. The time now is 13:35.