Calculating Rectangular Hopper Discharge Rate

Posted in: , on 25. Dec. 2011 - 11:42

How to calculate the discharge rate from a rectangular hopper?

Beverloo formulation is widely used for predicting the discharge rate from a flat-bottomed cylindrical silo with a circular opening. Myers and Sellers(1971) extended the correlation to a flat-bottomed(90) rectangular hopper outlet of width Wo and

length L, and predicted the discharge rate as

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Typically, the flowing desity Name: 222.JPGViews: 2459Size: 1.0 KB is determined by taking the ratio of the mass flow rate to the volumetric flowrate,the latter quantity measured by observing the change in the material head in the hopper.

But how to calculate the flowing desity in DEM?

Can Name: 222.JPGViews: 2459Size: 1.0 KB in the above-mentioned equation be replaced of the bulk density of the material after filling the hopper? e.g.

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or who has the papers of "Myers, M.E.,Sellers,M.,1971. Chemical engineering, tripos part2. Research Project Report, University of Cambridge. "? Can you give me a copy? Please email me to "panpan0429@sina.com"

Thanks!

yours sincerely ■

Antworten
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Lyle Brown
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Re: Calculating Rectangular Hopper Discharge Rate

Erstellt am 26. Dec. 2011 - 10:38

Jenikie and TUNRA provide guidance.

I could not locate it online in a brief search.

Regards,

Lyle ■

Re: Calculating Rectangular Hopper Discharge Rate

Erstellt am 31. Dec. 2011 - 03:01

Sorry, I am from China, and most of the literatures about rectangular hopper discharge rate can not be found in my school library. Can you give some equations predicting discharge rate from wedge-shaped hopper that are commomly used? And please explain the paremeters of the equation exhaustively so as to easy understanding. Or send me some classical literatures about this.

Thanks very much ■