How simulate the aerated flow in spillway using Flow-3D
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Recently,we are simulating the aerated flow in spillway by using Flow-3D, but I have some questions about the models and parameters in the simulation.
Jeff Burnham has said this situation only need three models: air entrainment、density evaluation and drift-flux. I think so, but I can not get the parameters from everywhere. Who can tell me how define the parameters ?Aeration concentration is very important for me. I will be very happy if you could give me the more details. My research project planning is about ordinary spillway (Non-stepped). Can you give some advices ? If you can help me, I would be very grateful ! Attachment 20468 Attachment 20469 Attachment 20470 |
HI
do you simulating a spillway with self aeration or artificial aeration into the aerator ramp? because I have same problem.But i could not access a good guide to simulate that. i don't know can i simulate spillway with aerator device in flow 3d or fluent? |
Those parameters look reasonable. The one that might need calibration is the Air Entrainment Rate Coefficient: it is very cell-size dependent in FLOW-3D versions before v10.1.
The best way to approach it would be to find data for a case that is similar in scale to the one you are going to model. Find the mesh size that you want to use for your case, and with that mesh size, do simple test cases to figure out what the air entrainment rate coefficient should be. If you have no idea, use 0.5, but the concentration may not be as accurate as you would like. The trend will be correct, and usually depth-of-penetration of the air is pretty reliable as well. |
my project is also about aerator device . The documents what I have read almost simulate the solution by Fluent. But my tutor make me use the Flow-3D, I have no idea. How about your project?
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If you have time, can you tell me about the Richard-Zaki coefficient mutiplier、Average particle radius and Volume fraction of phase #2atinversion point in the Drift-flux model. Thank you ! |
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my problem is injecting air into the air duct. can you simulate that? and can flow3d model the cavity above the offset? is your project similar to this pic? see this pic |
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Hello, Could you simulate aerated flow in the spillway properly with these parameters by using Flow 3D? Is there any update you can do? Thank you in advance! |
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Thanks, |
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