CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Regarding selection of species order

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

LinkBack Thread Tools Search this Thread Display Modes
Old   February 6, 2021, 06:46
Default Regarding selection of species order
New Member
Join Date: Nov 2020
Posts: 3
Rep Power: 3
Anshul7 is on a distinguished road
Hi all,

I am working of methanol steam reforming using packed bed. The main species involved in this are CH3OH, H2O, CO2, H2 and CO. Their reaction is shown in the image attached.

While selecting species order in mixture template, I am using this order:

CH3OH > H2O > CO2 > H2 > CO.

However, In FLUENT guide it is stated that the last species should be bulk (overall largest mass fraction) as as FLUENT solves for n-1 species only and for the last one it gives automatically.

How to chose this species as initially we have only two species CH3OH and H2O with certain mass fraction, that will get converted to other species like H2, CO2 and CO during reforming reaction.

I then ended up using N2 as last species as it is not involved in given reaction. But still, as at inlet we have 0.33 mole fraction CH3OH and 0.67 mole fraction of H2O, So, N2 will zero!. so how I should go ahead with this species order situation? Is adding N2 is valid even if it is not involved in reaction ?
Please help me with this.

Attached Images
File Type: jpg cfd.JPG (18.7 KB, 6 views)
Anshul7 is offline   Reply With Quote


ansys 18.1, fluent 18.1, methanol, steam reforming

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
How to specify surface flux of a species? ked FLUENT 18 February 15, 2022 15:03
What is the equation or formula to calculate Mass Flux[kg/ms] of species in Fluent? THA SEANGHAI FLUENT 0 September 11, 2020 01:10
Combine Flux/Concentration BC in Electrochemical Species Model Anodos STAR-CCM+ 0 May 4, 2020 15:03
First order simulation better than second order Torque_Converter CFX 7 January 8, 2013 04:07
Species order fluent Raddi FLUENT 1 March 13, 2009 00:21

All times are GMT -4. The time now is 12:30.