[OtreborPhD]

Hi all, I'm trying to simulate fluid mixing in a stirred tank.
Two liquids react in a crystallization reaction, and solids precipitate. In real life, this reaction greatly influences the viscosity of the mixture and I would like to figure out how to simulate it.

Is there some way to link the mixture viscosity to the amount of solids?
Or is this already accounted for in particle-fluid interactions?

Any help much appreciated

[fluid23]

Do you have an equation that describes this process? You should be able to create and assign a field function to the viscosity material property.

[Bal]

I have a similar question. I'm trying to simulate the precipitation of CaCO3. The rxn is as follows:

CaCl2 (aq) + 2NaHCo3 (aq) -----> CaCo3 (s) + 2NaCl (aq) + CO2 (g) + H2O (l)

[cwl]

Originally Posted by OtreborPhD

Is there some way to link the mixture viscosity to the amount of solids?
Or is this already accounted for in particle-fluid interactions?

Yes. Yes. The question is - how much does the present solid particles affect the flow (apart from viscosity).
Then in case of "low effect" it can be modelled just by alternating the viscosity and probably simulating particles via Lagrangian approach, otherwise - full multiphase model might be needed.