Recently, I am working on a multiphase LBM using C-S equation of state to calculate effective mass. However, I feel, I am having trouble in keeping the densities of liquid and vapor parameters.
However, the density of liquid and vapor that I used for it are:
density_liquid=0.39;
density_vapor=4.8808e-4;
The density ratio is approximately 800.
I am using Shan Chen BGK lattice boltzmann method using C-S EOS.
I will be happy with any kind of input from your side.
Thank you!
Regards,
Debashis Panda
Dear Debashis,
what do you mean by "keeping the densities of liquid and vapour parameters"? Does that mean the phases are not preserved with your initial values?
Best,
Ernesto
Dear Ernesto,
It is having the same problem as I had earlier. The densities are getting negative after some iterations. I feel I'm making some mistakes in keeping the initial density of liquid and vapor phase in the model.
However, if you have come across such problem, please let me know, how to rectify it.
Thank you for your reply!
Dear Debashis,
the densities get negative probably because the initial density ratio is too high or not consistent with the C-S predicted value at that reduced temperature. I should have some old data of mine saved, if I find something I will let you know. In the meantime, which fluid are you trying to simulate? If it is water, for instance, you may check the expected values of liquid and gas phases in the paper by Yuan and Schaefer (2006) where C-S and other EOS were incorporated for the first time in LBM.
Best,
Ernesto
- Badges
- Science topic