Gravity Decanter

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 June 14, 2019, 11:10 Gravity Decanter #1 New Member   Mobin Join Date: May 2019 Posts: 2 Rep Power: 0 Hi guys , I`m going to model a gravity decanter like the picture below. This decanter is used for the continuous separation of two immiscible liquids of differing densities. The feed mixture enters at one end of the separator. Two liquids flow slowly through the vessel, separate into two layers and discharge through overflow line at the other end of the separator. Provided the overflow lines are so large that frictional resistance to the flow of the liquid is negligible and provided they discharge at the same pressure as that in the gas space above the liquid in the vessel, the performance of the decanter can be analyzed by the principles of the fluid statics. Can I model this unit simply like the 2d image below? If yes, how should I set the boundary condition for such a problem? Guys have you done anything like this? I really need your help…Thanks…. Screenshot_1.jpg Screenshot_2.jpg

 June 17, 2019, 04:46 #2 Senior Member   Join Date: Aug 2014 Location: Germany Posts: 263 Rep Power: 9 If you want to demonstrate the principle than your sketch and a 2D approach might be sufficient.

June 17, 2019, 11:45
#3
Senior Member

Filippo Maria Denaro
Join Date: Jul 2010
Posts: 4,896
Rep Power: 52
Quote:
 Originally Posted by mobintor Hi guys , I`m going to model a gravity decanter like the picture below. This decanter is used for the continuous separation of two immiscible liquids of differing densities. The feed mixture enters at one end of the separator. Two liquids flow slowly through the vessel, separate into two layers and discharge through overflow line at the other end of the separator. Provided the overflow lines are so large that frictional resistance to the flow of the liquid is negligible and provided they discharge at the same pressure as that in the gas space above the liquid in the vessel, the performance of the decanter can be analyzed by the principles of the fluid statics. Can I model this unit simply like the 2d image below? If yes, how should I set the boundary condition for such a problem? Guys have you done anything like this? I really need your help…Thanks…. Attachment 70437 Attachment 70436

And what should be the 2D plane you would simulate? I don't see a particular 2D section representative of the problem...

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