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Material Flow in Pipe

Material Flow in Pipe

Material Flow in Pipe

(OP)
Hello,

I'm trying to calculate the bulk material flow (kg/sec.) in a pipe (15.75" ID, gravity feed).  The material is coal.  Does anybody know of any resources that discuss this topic or derives the equations?  Particle size would be >500 mircon, bulk density of ~800kg/m^3.

Thanks in advance,
Ed

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