Chinese Journal of Geochemistry

, Volume 10, Issue 2, pp 180–187 | Cite as

Haphazard packing of unequal spheres

  • Ye Danian
  • Zhang Jinmin


Haphazard packing of equal and unequal spheres can be performed for the spheres of molecular sieve material with a density of 1.80. The packing of such spheres in air is equivalent to that of natural grains in water. Packing concentrations of equal spheres have been obtained for different packing intensities. Unequal spheres can be regarded as equal ones in a wide range of diameter ratios, so far as the packing concentration is concerned. A threshold of diameter ratio exists at 0.70, below which the packing concentration is expected to increase. The variation curves of concentration vs. diameter ratio were established in the experiment. The result will help us to understand the process of sedimentation and the concentration of voids in sedimentary rocks.


Dense Packing Diameter Ratio Sedimentary Structure Sphere Diameter Random Packing 


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  1. Allen, J. R. L. (1982) Sedimentary Structures: Their Character and Physical Basis, Vol.1. Elsevier, Oxford, New York, 137–177.Google Scholar
  2. Bernal, J. D. and Mason J., (1960)Nature. 188, 910–911.CrossRefGoogle Scholar
  3. Gotoh, K. and Finney, J. L. (1974)Nature,252, 202–205.CrossRefGoogle Scholar
  4. Oman, A. O. and Watson, K. M. (1944)Nat. Pet. News,36, R795-R802.Google Scholar
  5. Ridgway, K. and Tarbuck, K. J. (1968)Chem. Process Eng., 103–105.Google Scholar
  6. Scott, G. D. (1960)Nature,188, 908–909.CrossRefGoogle Scholar
  7. Scott, G. D., Charleworth, A. M. and Mak, M. K. (1964)J. Chem. Phys.,40, 611–612.CrossRefGoogle Scholar
  8. Smith, W. O., Foote, P. D. and Busang, R. F. (1929)Phys. Rev.,34, 1271–1274.CrossRefGoogle Scholar
  9. Ye Danian, Han Cheng and Zeng Rongshu (1987)Kexue Tongbao,32, 830–835.Google Scholar

Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1991

Authors and Affiliations

  • Ye Danian
    • 1
  • Zhang Jinmin
    • 1
  1. 1.Institute of GeologyAcademia SinicaBeijing

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