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Old   June 14, 2019, 11:10
Default Gravity Decanter
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Mobin
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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
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Old   June 17, 2019, 04:46
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If you want to demonstrate the principle than your sketch and a 2D approach might be sufficient.
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Old   June 17, 2019, 11:45
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Filippo Maria Denaro
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Quote:
Originally Posted by mobintor View Post
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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