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True. It will tend to be stangant at the center. That;s why I extract the accept from the center. The swirling motion helps eliminate motorized skimmers and associated equipment. Once the fluid enters the cell tangentially, the fluid start going towards the center after the first circle and...

Yes. I want swirling on the surface but want to keep it medium speed without any slope towards the center. The baffles were attached to the accept zone and the wall. The reject funnel or the zone is not an issue. I have a video file but could not upload (6.8 MB) for some reason. I get the...

Thanks for the tips. I can try the sloped dish. I used some baffles, called vortex breaker and helps a little.

Ok. Attached please see two model.The force for the circular motions comes from a pump feeding the pipe attached tangentially at the bottom. The water comes in at the bottom and raises to the top to enter the inner funnel. But looking for a flat aurface at the top without a spiralling conical...

Sorry I could not finish the reply. If you look at the file, I am looking for circular motion with flat surface without a deep vortex to keep the floatables on the surafce swirling without moving toward the center fast. Thanks and sorry for the confusion

Thank you all.http://files.engineering.com/getfile.aspx?folder=6e9fea0e-1416-4c1f-ab65-337a12ffd00f&file=vortex.xls

Please check the leaks. I had similar problem in a water line and was much louder than this. The clamp or gasket in case of bigger lines usually makes this type of noise as well

Is there any software or formula to calculate the optimum velocity for water to swirl with out any vortex in a tall and larger diameter tank ? Thanks