The cascade-forming circulation flow of particles in a horizontal rotary cylinder was first expressed inductively in terms of the characteristics that determine the profiles of the regions organizing circulation flow. This was done with equations expressing the operational condition, that is, the hold up ratio and/or Froude number, making use of data published by other researchers.
Secondly, through those studies, the motion of the particles in each region, and thereby of the entire circulation flow was analyzed. Methods to calculate the position of the whirl core, the retention time of particles in each region, and the theoretical power required for circulation in the rotary cylinder could be calculted.
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