Multiphase fluid simulations

[doyubkim]

Implement multiphase fluids including:

• Grid-based two-phase flow
  • Both smeared Song et al. 2005 and GFM Hong and Kim 2005
• Grid-based multiphase (more than 2) flow Losasso et al. 2006
• Grid-based bubbly flow Kim et al. 2010
• Particle-based multiphase flow Yan et al. 2016

[doyubkim]

@marcelsan, let's discuss this issue and see how we can implement each solver. The references are not complete, yet. Also, please let me know if this is aligned with your original thinking.

[PavelBlend]

Question:
Is it possible to add the following effect in the future?:
https://youtu.be/5h6UAjB4Xjo

Air incompressibility. To air was the second phase.
There is a code, for example:
https://github.com/ryichando/shiokaze

[PavelBlend]

And more interested. It is possible to realize multiphase fluids, like here:
https://youtu.be/TawnuP5xPo4
https://youtu.be/3yyLIG935zc?t=191

[doyubkim]

Two-phase fluid is planned but didn't have enough bandwidth to implement it. I do have my old personal code that implements a couple of papers mentioned above -- one of the papers is mine anyway -- but I need time to port it over. @PavelBlend if you want this feature, I can bump up the priority.

[PavelBlend]

Yes, I would like to see this feature.
Since I use jet fluids for a blender. And for the blender there is not a single multi-phase simulator.

[doyubkim]

Sounds fair. The first iteration will be similar to http://research.nii.ac.jp/~rand/shiokaze-en/index.html. No particles, but with level-set only. Two-phase PIC/FLIP/APIC would come next. Not sure I want to implement multiphase SPH, but it will be the last if I do.