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堵塞圆包装的结构具有广泛的尺寸比率
Sebastian Rocks1, Robert S Hoy1
1Department of Physics, University of South Florida, Tampa, FL 33620, USA. rshoy@usf.edu.
Soft matter
|July 17, 2023
概括
这项研究揭示了粒子的形状,特别是它们的面积比 (α),如何影响二维圆包装中的阻塞密度和局部结构. 密集器包装显示了增强的顺序,协调号取决于颗粒的方向.
科学领域:
- 软物质物理学 软物质物理学
- 体科学 体科学 体科学
- 材料科学 材料科学 材料科学
背景情况:
- 最近对合体悬浮液中液态玻璃的观察促使进一步研究.
- 了解无序系统中的堵塞状态对于材料设计至关重要.
- 以前对圆包装的研究还没有探索广泛的尺寸比.
研究的目的:
- 为了研究二维圆包装的阻塞密度 (φJ) 在广泛的面积比 (α) 中.
- 分析当地的结构顺序和协调数 (ZJ) 作为粒子面积比的函数.
- 开发阻塞密度的预测模型,了解颗粒形状对包装结构的影响.
主要方法:
- 模拟了不同比例 (1 ≤ α ≤ 10) 的两个维圆包装的模拟.
- 高精度测定干扰密度 (φJ(α)).
- 使用对相关函数 (g(r,Δθ)) 和协调号 (ZJ) 来分析局部结构顺序.
主要成果:
- 经验分析公式准确地预测了研究范围的0.1%内的干扰密度 (φJ(α)).
- 密集的圆呈现出明确的近邻外,并增加了六个接触的粒子分数.
- 坐标数 (ZJ) 随着α的增加而下降,这是由于阴性排序,偏离等静性 (Ziso = 6).
结论:
- 在二维圆包装中,粒子面积比显著影响阻塞密度和局部结构.
- 在密集的包装中发现了一个新的短距离顺序,其特点是"动力抑制"区域.
- 干扰密度和和随机顺序吸附 (RSA) 密度之间的关系几乎独立于没有显著局部顺序的系统的α.
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