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-   -   About energy equation in combustion solvers (http://www.cfd-online.com/Forums/openfoam-solving/60499-about-energy-equation-combustion-solvers.html)

tsjb00 August 31, 2005 14:05

In the combustion solvers, the
 
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

isabel February 15, 2012 06:31

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?

mkaraca February 19, 2012 18:54

total energy
 
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.


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