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Simulation of aerator in a large tank

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Old   November 6, 2020, 11:48
Default Simulation of aerator in a large tank
Farzad Faraji
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Dear Friends
I am simulating aerator in a large tank. Since I am simulating both aerator and large tank at the same time, I want to use the same mesh size all over the domain to avoid different timescales(eg if I use smaller mesh for aerator, my time step will be much smaller). To do so, I have used fvOptions to generate a source of momentum to push the water out of the channels and also suck the water to the aerator(You can see it as a red cylindrical momentum source).

I have done all aforementioned things using pimplefoam(I am just working with water instead of water and air mixture), but my simulation is instable. Now, I have two questions;
1- How can make it stable?

2- Is there any other way I can simulate the outlet of the channels without considering the aerator chamber? If so, what is happening to continuity equation? since mass increases inside the domain without any outlet.

3- Do you have any other suggestion for me?

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Old   November 6, 2020, 12:22
Default Question about complex geometries using toposSetDict
Farzad Faraji
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Hello again
How can I generate complex geometries using toposSetDict? Is it feasible or not?
I want to put my momentum source inside the channels of aerators, but first I have to define that region inside the channels using toposSetDict?

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aerator, fvoptions, instable, large tank, openfoam

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