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The hung-up regime of a hopper-standpipe system with and without a gas-splitting setup is studied experimentally for a Geldart-D powder with respect to the effects of the diameter of the orifice, the stagnant height in the hopper, the angle of the hopper, the length and diameter of the standpipe, and the splitting-fraction of the gas in the system with gas-splitting. The incipient condition, where...
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