hi OpenFOAMers, I am inter
 

hi OpenFOAMers,

I am interested in using openfoam to simulate of pulverized coal combustion.

is it possible?

as you know, the radiation heat transforing is very important in coal burning furnace. but I cann't find the radiation model in openfoam. if there is not the model, what hints for developing the radiation in openfoam?

My mean is that whether it is
 

My mean is that whether it is possible that developing the radiation model in OpenFOAM? I am a newbie to C++,now have no concept with it, but I am going to transfer to c++ from Fortran with the radiatioin model.
who can give me some comments about it?
thanks.

That depends on how good you
 

That depends on how good you are... :-)

There are two kinds of radiation models:
- one solving a laplacian with fancy boundary conditions
- the discrete ordinate model, which shoots rays from pathc faces to other faces and calculates the viewing factors etc.

Which is appropriate for your use depends very much on your problem (is participating media important, for example). As for implementation, the first one is easy (that is what foam is for!) and I suppose an expert (me?) could do it in a day or so. Considering how much you need to learn about the software, C++ and boundary condition implementation and handling in foam, I would say a novice may need 3-4 months. The second model is much more difficult because there is no infrastructure for anything above ray tracing (and even there you will need help!).

Sounds like fun, though...

Hrv

thank you for comments. I ha
 

thank you for comments.
I had writen the Fortran code for the radiation model with discrete oridnate model, but as you said it's a job which can not be completed to me.

thanks again!

Of course it's possible to im
 

Of course it's possible to implement any of the many radiation models in OpenFOAM although some would be easier than others. Diffusion-based approaches would be the easiest as they are most similar to other standard continuum mechanics equations but other continuum methods like Pn expansion and the various finite-volume methods would also be quite straight forward to implement in OpenFOAM. Although OpenFOAM includes basic finite-element functionality (primerily used for mesh motion) I think this would be quite hard to extend for the purpose of radiation simulation.

OpenFOAM also includes very general tracking functionality which could easily be used for the many tracking-based radiation approaches like "Monty Carlo", discrete ordinate, discrete transfer etc. although all the boundary interaction and media interaction physics would have to be implemented from scratch.

I understand that some people at Tokyo Gas in conjunction with Tokyo University and Fluid Technologies have interfaced their complex radiation approach with FOAM but I think they intend to commercialise it rather than release it public-domain.

If there is a general interest in having radiation modelling on OpenFOAM we at OpenCFD would be very happy to implement some of the more commonly used methods if we can find sponsorship for the project. Would any of our current users be interested in supporting this work?

After one year's learning, I h
 

After one year's learning, I have had some concepts on OpenFOAM code. now I want to modify the dieselEngine to pulverized coal combustion model.
Would some experts here give me some suggestions for doing it?
As for pulverized coal combustin, there are three stage:
1, coal particle volatize,
2, volatile gas phase combustion, which model to be used?
3, char combustion.

need it develop some basic classes scratch?

Hi Leosding! I'm also interes
 

Hi Leosding!
I'm also interesting in coal combustion.
Are you still working on coal combustion with OpenFoam? If yes could you give some advices on it?

Thank you

Michele

Michele, According Henry's re
 

Michele,
According Henry's report "Open-source CFD for Commercial Use" in DTU, the coal combustion model is in development.
Maybe we can wait it for a while.

Leo

Thank Leo for your answer, the
 

Thank Leo for your answer, therefore I stay tuned for some news.

Michele

Dear Henry, Here we want to
 

Dear Henry,

Here we want to know the progress of coal model development which is great for power industry applications.

At present I engaged to PC burn boiler furnace with limestone desulphuring research with commercial software Fluent which simulates pulverized coal burning and limestone decarbonation with langrange model in furnace of power station.

If you feel easy, I can do some test and validation works for your model.



Best regards,

Leo

Now the release 1.5 is for it!
 

Now the release 1.5 is for it!
Great work.

Now 1.6 is ok for it!

Dear Leosding,

Please let me know if you have completed any pulverised coal combustion simulations with OpenFoam?

Kind Regards,
Les

coal combustion
 

Is the new version of OpenFoam able to do coal combustion for burners? has anybody tested it and compared it with other softwares? or exp data?

Hi Henry, I am doing coal combustion now, I write my own Fortran code. But my code doesn't converge. Could you help me with that code, give me some advice? Thank you.