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

Partially premixed combustion, chemkin

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

Like Tree2Likes
  • 1 Post By tsi07
  • 1 Post By tsi07

Reply
 
LinkBack Thread Tools Display Modes
Old   June 13, 2017, 18:39
Question Partially premixed combustion, chemkin
  #1
Member
 
Join Date: Mar 2012
Location: USA
Posts: 31
Rep Power: 7
tsi07 is on a distinguished road
Sponsored Links
Hi everyone

I try to make a partially premixed combustion in a swirl flow for a compressible kerosene-air mixture.

In fluent under "species model" I chose Partially Premixed Combustion with C Equation and compressiblity effects.
For the chemistry, I want to use the "flamelet Generated Manifold". Hence I have to give a Chemkin mechanism. I use the default thermodyanmic data "thermo.db".
I wrote a file for the chemkin mechanism where there is just the main reaction.

-_-_-_-_-_-_-_-_-_-_-_-_-
Chemkin file:
ELEMENTS
O H C N
END
SPECIES
O2 H2O CO2 C12H23
N2
END
REACTIONS
C12H23 + 17.75O2 = 12CO2 + 11.5H2O 2.587e+09 0.0 1.257e+05
END
-_-_-_-_-_-_-_-_-_-_-_-_-

After I imported it, I go to the flamelet tab and try to calculate flamelets but I have an error message:

Error: received a fatal signal (Segmentation fault).

I do not understand why.

Also, the flamelet mixture is incompressible and I cannot change that.

Is anyone can help me?

Thanks.
Светлана likes this.

Last edited by tsi07; June 14, 2017 at 09:54.
tsi07 is offline   Reply With Quote
Sponsored Links

Old   June 14, 2017, 12:58
Default Error message when I calculate flamelets
  #2
Member
 
Join Date: Mar 2012
Location: USA
Posts: 31
Rep Power: 7
tsi07 is on a distinguished road
OK, I changed my Chemkin mechanism (.inp file) and I do not have error when I upload it in the chemistry tab under "Import CHEMKIN Mechanism...".

But after I set the "Boundary" tab and go to "Flamelet" I obtain this error message when I hit the button "Calculate Flamelets" :
-_-_-_-_-_-_-_-_-_-_-_-_-
Generating flamelet 2 at mixture fraction 0.0132144 and scalar dissipation 201.586 /s

Time (s) Temp (K) Residual

Error: CVODE unsuccessful: flag = -4


Error: CVODE unsuccessful: flag = -4\n
Error Object: #f
-_-_-_-_-_-_-_-_-_-_-_-_-
Is anyone knows what does that mean?
Светлана likes this.
tsi07 is offline   Reply With Quote

Reply

Tags
chemkin mechanism, compressible flow, flamelet, partially combustion

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
ືNeed help for partially premixed combustion model lem FLUENT 0 September 30, 2016 05:49
Reverse flow with Partially premixed combustion navneet FLUENT 0 May 28, 2016 00:57
How to model premixed combustion using partially premixed combustion model in Fluent? sab10012 FLUENT 0 October 6, 2015 01:18
Partially premixed combustion problem shashankvu FLUENT 2 April 21, 2015 17:45
Partially Premixed Combustion - Direct Fired Boiler oknus FLUENT 0 April 10, 2012 10:52

Sponsored Links


All times are GMT -4. The time now is 21:53.