JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2015, Vol. 50 ›› Issue (07): 89-94.doi: 10.6040/j.issn.1671-9352.0.2014.360

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Research on the angle of repose of natural sand

ZHOU Xiang-ling1, muhammadtursun·ABUDUREYIM1, YU Sheng-qing1, LI Hua-zhen2   

  1. 1. Department of Physics, Kashgar Teachers College, Kashgar 844000, Xinjiang, China;
    2. Physics College, Chongqing University, Chongqing 401331, China
  • Received:2014-08-07 Online:2015-07-20 Published:2015-07-31

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Abstract: In this paper we take the sands collected from the natural dunes at the southwest edge of Taklimakan desert as our experimental subjects. We drift the sands into mounds by using static funnel method and record some videos for the drifting processes Then we translate the videos into pictures and analyze them by the computer software “CorelDraw”. By analysis we get the Dependence of the static angle and the collapse angle of the sand mounds on the time and the particle size. Then we make some conclusions: (1) The angle of the sand mound always follow the same circle, i.e., from the maximum static angle to the collapse angle and back to the minimum static angle. Thus the static angles oscillate over time. (2) When the particle diameter is less than 0.3 millimeter, the difference between the collapse angle and the static angle will be increased with the increase of the particle size. Whereas when the particle diameter is greater than 0.3 millimeter, it will be decreased with the increase of the particle size. (3) The average difference between the collapse angle and the static angle is (4.6±0.6)°. (4) The difference between the collapse angle and the static angle of the mixed sand mounds is range(5.2±0.3)°.

Key words: sand, sand heap, static angle, collapse angle, particulate matter

CLC Number: 

  • O469
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