[rafiee.ad]

Hello,

I want to simulate the effects of aeration (using air bubble) on stratified dam reservoirs by using OpenFoam. The simulation is imposed on a 2 dimensional vertical field and the purpose is to obtain the velocity field.

I would be so grateful if you could kindly help me in selecting an appropriate solver in OpenFoam to tackle this problem.

Best regards,

[Dipsomaniac]

Hello Arash

To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.

Regards,
Brian

[rafiee.ad]

Originally Posted by Dipsomaniac

Hello Arash

To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.

Regards,
Brian

Thank you Brian for your kind help and attention.


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[maalan]

To capture two phase effects in a simulation of a real life dam size problem, I would suggest you look at twoPhaseEulerFoam solver. The other option is interFoam, though I suspect the necessary mesh size will be too large to capture aeration effects which you desire. Though I see it is a 2-D problem, so then interFoam could be an option, though capturing many bubbles becomes very computational intensive. Have a look at the twoPhaseEulerFoam tutorials (bubble column) and the interFoam ones such as the weir Over Flow to determine which will best suite your needs.

Hi Brian,

I have to simulate a 3D aeration tank with a residence time around 2.5 hours. What's the best choice for such as large time scale?

Cheers,
Antonio

[BlnPhoenix]

Originally Posted by maalan

Hi Brian,

I have to simulate a 3D aeration tank with a residence time around 2.5 hours. What's the best choice for such as large time scale?

Cheers,
Antonio

TwoPhaseEulerFoam.

[farzadmech]

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?

Thanks,
Farzad