|
[Sponsors] |
![]() |
![]() |
#1 |
Guest
Posts: n/a
|
Hi to all STAR-CD users, as my first attempt to use STAR-CD, I'm trying to simulate a very simple laminar flame propagation in a premixed (stoichiometric) propane-air mixture, which filled completely a cubic closed vessel. A central spark ignition was used. The flame propagation seems to be reproduced using a single one-step reaction but temperature and density values seem to be not realistic (they are much higher than adiabatic flame temperature). I need some help! Thanks in advance. Ernesto
|
|
![]() |
![]() |
![]() |
#2 |
Guest
Posts: n/a
|
Ernesto,
What type of boundary conditions are you using? What are you using for a reaction rate model? Do you have enthalpy set to Chemico? Is Propane an active or passive scalar? What differencing schemes are you using? What are your inlet temperature and density? Ron |
|
![]() |
![]() |
![]() |
#3 |
Guest
Posts: n/a
|
Dear Ron, thanks, I answer yr. question: a) What type of boundary conditions are you using? The vessel is completely closed by walls b) What are you using for a reaction rate model? The chemical kinetic rate as given in the user subroutine REACFN (but I have the same problem even using a very simple fixed reaction rate) I checked at the ignition point and c) Do you have enthalpy set to Chemico? Both (thermal and chemico) give tha same problem with temperature and density d) Is Propane an active or passive scalar? Active e) What differencing schemes are you using? Upwind differencing, for all scalars f) What are your inlet temperature and density? The initial temperature and density are at atmospheric temperature (there is no inlet, the vessel is just closed)
Regards Ernesto |
|
![]() |
![]() |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Stretch and Quenching in Premixed Turbulent Flames | JK | Main CFD Forum | 0 | April 2, 2006 14:05 |
Colour of flames | Paul | Main CFD Forum | 3 | March 8, 2006 05:41 |
RANS modelling of turbulent non-premixed flames | Bhargav | Main CFD Forum | 0 | November 21, 2005 12:34 |
Turbulent non premixed coal flames | IIN | CFX | 0 | November 7, 2000 12:53 |
free-jet flames | Latrille | Main CFD Forum | 1 | December 16, 1999 23:31 |