CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

About energy equation in combustion solvers

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 31, 2005, 14:05
Default In the combustion solvers, the
  #1
New Member
 
Bei
Join Date: Mar 2009
Posts: 21
Rep Power: 17
tsjb00 is on a distinguished road
In the combustion solvers, the enthalpy equation doesn't include chemical reaction source term. For instance, in reactingFoam, chemistry.solve is called to get the species source term, but based on the chemistryModel::solve(), the temperature/enthalpy of mixture are calculated and discarded when returning from the subroutine. It must be my misunderstanding. Please tell me how it works with the energy equation. Thanks!

Bei
tsjb00 is offline   Reply With Quote

Old   February 15, 2012, 06:31
Default
  #2
Senior Member
 
isabel
Join Date: Apr 2009
Location: Spain
Posts: 171
Rep Power: 17
isabel is on a distinguished road
Dear everybody,

I have exactly the same doubt. For example, the enthalpy equation of the solver xiFoam does not include any chemical reaction source term:

solve
(
fvm::ddt(rho, h)
+ mvConvection->fvmDiv(phi, h)
- fvm::laplacian(turbulence->alphaEff(), h)
= =
DpDt
);

How does the solver computes the increment of temperature due to combustion?
isabel is offline   Reply With Quote

Old   February 19, 2012, 18:54
Default total energy
  #3
New Member
 
lapaci
Join Date: Feb 2012
Posts: 1
Rep Power: 0
mkaraca is on a distinguished road
If the formulation is based on the total energy, energy equation does not include reacting source term. It is in the species equation (formation enthalpy.)

Poinsot & Veynant was explaining many formulations of energy equations.

p.s. i am new in OpenFoam, where can i find a simple tutorial for a diffusion flame and which solver shall i use.
mkaraca is offline   Reply With Quote

Reply


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
Ignition fails in parallel run combustion solvers msha OpenFOAM Bugs 17 January 17, 2009 04:49
energy equation enzo FLUENT 2 September 28, 2005 07:54
Equation solvers nyatoto Fidelity CFD 4 April 27, 2004 07:00
Energy equation Suresh Balasubramanian FLUENT 1 April 6, 2003 03:54
Iterative equation solvers in CFD Vitaly Bulgakov Main CFD Forum 32 March 1, 1999 12:11


All times are GMT -4. The time now is 21:29.