An experimental and theoretical study was made of the rate with which fine particles undergo gravity discharge in air from a hopper. The particles studied were small enough for their motion to be significantly retarded by air resistance but large enough to be substantially free from cohesion. A simple flow system was chosen so that particle and air properties varied in one dimension only and could be measured easily. The theoretical analysis yields inter-related equations for particle flow rate and for the spatial distributions of particle stress, bed voidage and interstitial air pressure. Particle flow rates predicted from basic material properties and hopper geometry are about twice as large as measured values but show the correct dependency on particle size.

  • Corporate Authors:

    Elsevier Science S.A.

    P.O. Box 564
    CH-1001 Lausanne 1,   Switzerland 
  • Authors:
    • Spink, C D
    • Nedderman, R M
  • Publication Date: 1978-11

Media Info

  • Features: References;
  • Pagination: p. 245-261
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193760
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 26 1979 12:00AM