[Upa_upitas]

Hey,

Is it possible to run a multiphase simulation of a stirred tank (air+water) with a frozen field approach?

1- Run a single-phase sim (water)
2- Usign Expert parameters, only solve for the air using the single-phase results as initial values.

If it is, which "solve"options shoud be turned off in Expert paramers?

Many thanks

[ghorrocks]

I think it unlikely that approach would converge.

Why is doing this using the normal approach unacceptable? In other words, do a single phase simulation first and use it as an initial condition for a normal multiphase simulation?

[Gert-Jan]

You can turn off fluids and turbulence. Numerically it will converge, but to a solution that's worth nothing since it is completely unphysical. The air bubbles will influence the water flow and vice versa. You cannot ignore this. You're abusing the options the software provides you.

[Upa_upitas]

I was suspecting that the frozen approach didn't make sense for a multi-phase sim.

It's just that it's impossible to run a multi-phase simulation even with parallitzation an extremly low time step. Either the Solver exit with code 1 or the simulation time it's extreeeeeeeeeeeeeemly low.

Since it is not completely necessary for my Thesis, I will forget about it.

Thanks

[Opaque]

Originally Posted by Upa_upitas

I was suspecting that the frozen approach didn't make sense for a multi-phase sim.

It's just that it's impossible to run a multi-phase simulation even with parallitzation an extremly low time step. Either the Solver exit with code 1 or the simulation time it's extreeeeeeeeeeeeeemly low.

Since it is not completely necessary for my Thesis, I will forget about it.

Thanks

If the simulation requires such as small timestep, it can be because of:
1 - The physics requires it
2 - The model is extremely complex, and requires physics understanding to simplify it to make it manageable
3 - The setup has something inconsistent, missing, or it is not realistic.