LES of multiphase combustion with Eulerian formulation

wizard1301 · February 25, 2009, 05:04

Hi,
I would like to perform simulations of multiphase combustion (something similar to diesel spray), using Eulerian approch to describe the condensed phase (fuel droplets). Where should I start?

Thanks
Antonio

flying · June 23, 2009, 10:09

Hey Antonio!

I am also interested in the using LES approach instead of the RANS one to simulate the diesel spray.

But it is very sad that I am not sure about how to solve "Y" because I don't know the equation when I choose LES. I used the method as below to solve the Y, but I am not sure about it. Would you like to help me to make sure the method?

solve
(
fvm::ddt(rho, Yi)
+ mvConvection->fvmDiv(phi, Yi)
- fvm::laplacian(turbulence->muEff(), Yi)
==
dieselSpray.evaporationSource(i),
// + kappa*chemistry.RR(i),
mesh.solver("Yi")
);

In fact, There is no combustion in my case, so I didn't care about the chemistry and I delete "kappa*chemistry.RR(i)".If I care about the Chemistry, how do treat the term of "kappa*chemistry.RR(i)", which is generated in the RAS?

Thanks and best regards

February 25, 2009, 05:04	Hi, I would like to perform s	#1
wizard1301 New Member Antonio Attili Join Date: Mar 2009 Location: Rome, Italy Posts: 21 Rep Power: 17	Hi, I would like to perform simulations of multiphase combustion (something similar to diesel spray), using Eulerian approch to describe the condensed phase (fuel droplets). Where should I start? Thanks Antonio

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June 23, 2009, 10:09		#2
flying Senior Member xinguang cui Join Date: Mar 2009 Posts: 116 Rep Power: 17	Hey Antonio! I am also interested in the using LES approach instead of the RANS one to simulate the diesel spray. But it is very sad that I am not sure about how to solve "Y" because I don't know the equation when I choose LES. I used the method as below to solve the Y, but I am not sure about it. Would you like to help me to make sure the method? solve ( fvm::ddt(rho, Yi) + mvConvection->fvmDiv(phi, Yi) - fvm::laplacian(turbulence->muEff(), Yi) == dieselSpray.evaporationSource(i), // + kappachemistry.RR(i), mesh.solver("Yi") ); In fact, There is no combustion in my case, so I didn't care about the chemistry and I delete "kappachemistry.RR(i)".If I care about the Chemistry, how do treat the term of "kappa*chemistry.RR(i)", which is generated in the RAS? Thanks and best regards