J4 ›› 2012, Vol. 47 ›› Issue (7): 34-38.

• Articles • Previous Articles     Next Articles

Study of blanket shape on the granular medium surface

YU You-sheng1,2, HU Lin1*   

  1. 1. College of Science, Guizhou University, Guiyang 550025, Guizhou, China;
    2. College of Physics and Electronic Engineering, Kaili University, Kaili 556000, Guizhou, China
  • Received:2012-02-20 Online:2012-07-20 Published:2012-09-01

Abstract:

 When a big object rolling on the surface of the mountain, the mountain structure may be destroyed. Blanket is a region generated by uplift granules stopped in front of the object. In order to understand this natural phenomenon, an angle adjustable three-dimensional granular medium groove was constructed. The relation of blanket shape which is generated by the spherical objects with the particle′s diameter was established by means of image processing technology. Results show that the blanket shape is a quasi-parabola, and it is related to the particle′s diameter, namely the maximum long and halfwidth of blanket and area increases with both particles′ diameter. It is found that the blanket shape formation has two mechanisms of action, namely sphere and granular medium action mechanism and medium and medium viscous mechanism, and the former is little better than the latter. The blanket shape formation is non-Newtonian fluid in the viscous region.

Key words: granular medium; blanket; shape

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