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

Experts please help

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 2, 2010, 01:04
Smile Experts please help
  #1
New Member
 
tukaram
Join Date: Jul 2010
Posts: 9
Rep Power: 7
tuks_123 is on a distinguished road
My objective is to evaluate overall volumetric mass transfer coefficient, using CFD, for CO2 absorption from Air (gas) to Amine (liquid) with no reactions.

Using basic definition "N*a = K_L*a*(C_L_eq - C_L)". Where N is molar flux, K_L*a is volumetric coefficient and C_L_eq and C_L are concetration at interface (in equlibrium with gas phase conc) and bulk concentration. All values pertaining to CO2 in liquid ammonia/amine.

Can we evaluate K_L*a from hydrodynamics and concentration profiles in CFD?
My approach could be
  1. Define diffusivity of CO2 in Air (gas) and amine (liquid).
  2. Define gas-liquid interphase mass transfer using a model where only Henry's constant for CO2 needs to be specified.
  3. Solve the momentum, mass transfer equations for gas, liquid phases and get concentrations pofiles.
  4. Use concentration profiles to calculate molar flux (N) and then calculate K_L*a.
As I dont know details of interphase mass transfer models in CFX. Also I am not sure if approach is correct?
Experts views are welcome.

Thanks
Tuks
tuks_123 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
experts in multiphase flow modeling in fluent.inc? Asghari FLUENT 0 March 13, 2007 03:46
To GAMBIT experts, need your help.. Jim Clancy FLUENT 2 September 3, 2004 10:02
help me experts chelesa CFX 0 February 15, 2004 04:44
To Natural Convection Experts Amit CFX 1 January 4, 2004 18:07
invitation for CFD experts ROOH-UL-AMIN KHURRAM Main CFD Forum 2 March 17, 2000 01:02


All times are GMT -4. The time now is 15:37.