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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Impact of Size Fractal Distribution on Flow Behavior of Granular Flow System
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Impact of Size Fractal Distribution on Flow Behavior of Granular Flow System

机译：分形分布对颗粒流系统流动行为的影响

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According to the general constitutive equation of granular flow, impact of size fractal distribution on porosity and internal friction angle was studied experimentally with large-scale indoor relative densitometer and direct shear apparatus. The results show that, under the condition of the same physical density, elastic recovery coefficient and the geometric mean median granular size, porosity increases with fractal dimension increasing, meanwhile, the internal friction angle, particle concentration, shear stress and normal stress coefficients declines. Further more, in term of analysis on impact of size fractal distribution on flow behavior of granular flow system, it is found that, as for the system with smaller fractal dimension, shear stress is large and the fluid is poor and robustness is strong, On the contrary, as for the system with larger fractal dimension, shear stress is small and the fluid is good and sensitivity is strong. The discussion focuses on the mechanism of impact of fractal characteristics on collapse flow behavior of granular material, which offers a new idea for the study of granular flow system.
机译：根据颗粒流的一般本构方程，利用大型室内相对密度计和直接剪切仪，实验研究了分形分布对孔隙率和内摩擦角的影响。结果表明，在相同的物理密度，弹性回复系数和几何平均中值粒径的条件下，孔隙率随分形维数的增加而增加，同时，内摩擦角，颗粒浓度，切应力和法向应力系数均减小。此外，从分形维数对颗粒流系统流动特性的影响分析来看，分形维数较小的系统，剪切应力大，流体差，鲁棒性强。相反，对于分形维数较大的系统，剪切应力小，流体流动性好，灵敏度高。分形特征对粒状材料崩塌流动行为的影响机理探讨，为粒状流动系统的研究提供了新的思路。

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