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

Diffusion with Species transport model

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 3, 2023, 11:37
Default Diffusion with Species transport model
  #1
New Member
 
Germano
Join Date: May 2022
Posts: 1
Rep Power: 0
Cerbadave is on a distinguished road
Hi everyone,

I am using the Fluent species transport model to solve a non-reactive diffusion problem in a turbulent flow of a h2-ch4 blend in air. What I realized is that the effective diffusion coefficient for every species is equal through the entire domain, so that h2 and ch4 mix with air in the same way. That seems to me quite unrealistic.
I tried to change the settings in terms of mass diffusion coefficient of every species, but obviously the eddy diffusivity term overwhelms the laminar one, so it does not have any influence on that.
Does this mean that with this model every species diffuses in the same way based on the eddy viscosity of the flow field?

Thank you
Cerbadave is offline   Reply With Quote

Reply

Tags
diffusion coefficient, diffusivity, eddy diffusivity, species transport, species transport model

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
DPM and species transport model Achini Fluent Multiphase 1 December 12, 2020 01:28
Fluent species transport cavitation model vmbraga Fluent Multiphase 0 June 17, 2019 08:22
buoyancy in species transport model subhas.hunasikatti@gmail. FLUENT 0 January 10, 2014 04:40
species transport model simulating chemical reaction richard ben FLUENT 9 April 10, 2013 08:57
Species Transport model Karthick FLUENT 4 April 22, 2004 11:49


All times are GMT -4. The time now is 10:10.