[anthonytchen]

I'm new to OpenFOAM and in the past I used in-house C++ code to do simple meshing and the CVODE code to solve the discretised ODEs. I'm looking for advice how the following problem should be setup and solved in OpenFOAM.

Essentially it's a mass transfer problem, where a liquid solution containing several species diffuses through a media (no convection). The media is heterogeneous in the sense that the diffusivity is different at different locations; diffusivity also depends on the concentration of the species, because some chemicals interact with the media and change the diffusivity. Simulation needs to be transient.

I looked at a few threads talking about using reactingFoam and switching off the reactions, to deal with the multispecies. Also there are a few threads suggesting writing user-defined code and compile with OpenFOAM to handle "variable diffusivity". Also one thread suggests modifying scalarTransportFoam to handle multiple species. But I haven't figured out what is needed to solve my specific problem above.

Many thanks!

[wayne14]

Originally Posted by anthonytchen

I'm new to OpenFOAM and in the past I used in-house C++ code to do simple meshing and the CVODE code to solve the discretised ODEs. I'm looking for advice how the following problem should be setup and solved in OpenFOAM.

Essentially it's a mass transfer problem, where a liquid solution containing several species diffuses through a media (no convection). The media is heterogeneous in the sense that the diffusivity is different at different locations; diffusivity also depends on the concentration of the species, because some chemicals interact with the media and change the diffusivity. Simulation needs to be transient.

I looked at a few threads talking about using reactingFoam and switching off the reactions, to deal with the multispecies. Also there are a few threads suggesting writing user-defined code and compile with OpenFOAM to handle "variable diffusivity". Also one thread suggests modifying scalarTransportFoam to handle multiple species. But I haven't figured out what is needed to solve my specific problem above.

Many thanks!

Interesting problem, have you managed to solve it?

[anthonytchen]

Originally Posted by wayne14

Interesting problem, have you managed to solve it?

no not yet ...