CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Programming & Development (http://www.cfd-online.com/Forums/openfoam-programming-development/)
-   -   Update pressure with temperature? (http://www.cfd-online.com/Forums/openfoam-programming-development/115706-update-pressure-temperature.html)

c_dowd April 5, 2013 03:36

Update pressure with temperature?
 
Hi,
I've got an incompressible combustion model, which updates temperature based on a combustion model. Now I would like to have this temperature affect the pressure field, but I can't for the life of me think how to do this. I realise it's something to do with the thermophysical model and the thermo->correct line, however my pressure still stays constant.

c_dowd April 5, 2013 04:28

Okay I am fairly certain the thermo.correct() line is the one responsible for updating the pressure with temperature, and the reason it's not working is because I'm using a psi type thermophysical model and my psi values aren't being update. I'm using a psi thermophysical model in order to use the built in combustion models, is there some way to update my psi values during the run? I tried psi = thermo.psi(), but this gave me errors.

ni-openfoam-user July 10, 2014 12:24

Incompressible combustion model
 
Dear Cameron,

I am currently working on modifying the "reactingFoam" solver from compressible to incompressible".

I have started by changing the Make/options file.

However I will also need to include an incompressible combustion model (to replace the current compressible combustion models available)

If possible could you post your incompressible combustion model?

I ultimately wish to simulate a high pressure hydrogen release (3 mm diameter at about 1000 m/s).

My plan is to use reactingFoam (switching off chemistry and reactions). I plan to modify the reactingFoam solver into an incompressible solver and then further modify it to run in steady state.

I would appreciate any comments or advice regarding this approach?

Kind regards,

James


All times are GMT -4. The time now is 23:02.