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Experimental measurements of orientation and rotation of dense 3D packings of spheres

机译:球体密集3D填充的方向和旋转的实验测量

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Many recent advances in the study of granular media have stemmed from the improved capability to image and track individual grains in two and three dimensions. While two-dimensional systems readily yield both translational and rotational motion, a challenge in three-dimensional experiments is the tracking of rotational motion of isotropic particles. We propose an extension of the refractive index matched scanning technique as a method of measuring individual particle rotation. Initial measurements indicate that shear-driven rotational motion may stem from gear-like motion within the shear zone.
机译:颗粒介质研究的许多最新进展源于对二维和三维单个晶粒的成像和跟踪能力的提高。虽然二维系统很容易产生平移运动和旋转运动,但是在三维实验中,挑战在于跟踪各向同性粒子的旋转运动。我们提出了扩展折射率匹配扫描技术作为测量单个粒子旋转的方法。初始测量结果表明,剪切驱动的旋转运动可能源自剪切区内的齿轮状运动。

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