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OpenFoam solver for water droplet injection into airflow

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Old   May 8, 2022, 05:51
Default OpenFoam solver for water droplet injection into airflow
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Lennart
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Hi,

I am looking for a suitable OpenFoam solver for the following problem:

A body is moving through air with a fixed velocity. At a certain location of its surface, water droplets are injected into the surrounding airflow through a nozzle.

The main goal is to analyze the droplets' effect on the flow field around the body including the following phenomena:
- heat exchange between water and air
- evaporation of droplets due to high airflow velocity and low pressure

During the analysis I would like to examine the influence of the following parameters:
- water pressure at the nozzle
- water flow rate
- water droplet size

The exact paths of the injected droplets are NOT important to me.

First, I thought about using one of the multi-phase solvers (like multiphaseEulerFoam), however here I could not find an option to simulate different droplet sizes.
Therefore, I think I might have to use a particle tracking solver, but I would appreciate your opinions on this, as well as recommendations on where to find a similar case I can use as a starting point.

Best regards,
Lennart
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Old   May 17, 2022, 04:56
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I am looking for the same thing as you, do you have any solution? Can you share it with me?


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Old   May 17, 2022, 05:19
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Hi jihouni,
By now, I have come to the conclusion that if you want to simulate different droplet sizes with a multiphase solver you need a mesh that is extremely fine in order to represent the single droplets with the mesh cells. That is why I believe it is a lot more efficient to do particle tracking in this case.
If you are looking for a similar case to start with, I recommend the OpenFOAM tutorials lagrangian/reactingParcelFoam/filter and lagrangian/reactingParcelFoam/verticalChannelLTS.
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Old   July 29, 2022, 10:20
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Edit:

I have found out that there is indeed an option for simulating different droplet sizes in the constant/phaseProperties dictionary of the multiPhaseEulerFoam solver.
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droplet, evaporation, lagrangian, multi-phase, solver

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