[gcordobaguerrero]

Hello all,

I need to model a multiphase thermocouled flow, which have at least two particle sizes and hot air, all of them inmersed on ambient air.

I did a successful attemp using the two phase tutorial fluidization case. However, that model is limited to just one particle size.

I would like to know if:

1. There is a multiphase-multiparticle solver available
2.- How can modify the reactingTwoPhaseEulerFoam/fluidized solver to be able to account for at least two particle sizes?

Thanks,


Gustavo Cordoba

[anuragm]

Hello Gustavo

1. Are the two particle sizes changing in time?

2. Is the volume fraction of the particles of each size changing in time?

[gcordobaguerrero]

Hi, thanks for your answer.

Your questions:
1. Are the two particle sizes changing in time?

No, neither the sizes nor the total amount of particles change in space and time (of course, if erosion/deposition of particles is not taken into account)

2. Is the volume fraction of the particles of each size changing in time?

Yes, there is a change of such a volume fractions in space and time.

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Thanks again,

Gustavo

[anuragm]

Hi Gustavo,

I would suggest using twoPhaseEulerFoam/multiphaseEulerFoam (or a derivative solver) and create two phases with different diameters associated with them. Both these solvers have particle diameters built-in as well as certain models for drag, etc. Of course, I am assuming that you are fine with an Eulerian description of your system.

Originally Posted by gcordobaguerrero

1. Are the two particle sizes changing in time?

No, neither the sizes nor the total amount of particles change in space and time (of course, if erosion/deposition of particles is not taken into account)

This means there is no transport in the particle property space & and the problem is simple to handle. So you will not have to use PBE or IATE in your solver.

2. Is the volume fraction of the particles of each size changing in time?

Yes, there is a change of such a volume fractions in space and time.

This can be taken care of using the approach of defining two phases with different diameters. Their volume fractions can also change based on the model you choose.