对颗粒对凝聚性颗粒包装的影响的实验研究
H Selmani1, J B Besnard2, A Ould El Moctar2
1Institut d'Optique et Mécanique de Précision, <a href="https://ror.org/02rzqza52">Université Ferhat Abbas Sétif</a>, 19000 Sétif, Algeria.
Physical review. E
|August 20, 2024
概括
沙粒对凝聚性颗粒包装的影响取决于凝聚力的强度. 更高的凝聚力增加了弹出粒子所需的撞击速度,影响了沙子运输模型.
科学领域:
- 颗粒物理 颗粒物理
- 粒子撞击动态 粒子撞击动态
- 凝聚性颗粒状材料是凝聚性的颗粒状材料.
背景情况:
- 了解颗粒对颗粒状表面的影响对于各种领域至关重要,包括地质物理学和材料科学.
- 粒子间凝聚力在撞击下的颗粒包装行为中的作用尚未完全理解.
- 以前的数值模拟表明,凝聚力显著影响影响结果.
研究的目的:
- 实验性地研究沙粒对凝聚性颗粒包装的影响.
- 量化不同凝聚力对粒子喷射的影响.
- 根据凝聚力水平确定不同的影响制度.
主要方法:
- 使用砂油混合物来控制颗粒包装的凝聚力.
- 实验分析粒子弹射作为冲击速度和凝聚力的函数.
- 定义和使用凝聚力数 (Co) 来分类凝聚力强度.
主要成果:
- 根据凝聚力数字 (Co) 确定了三种不同的影响制度.
- 低凝聚力 (Co1) 对喷射没有显著影响.
- 中间凝聚力 (1Co20) 降低了弹射效率,但没有改变临界撞击速度.
- 强凝聚力 (Co20) 增加了弹射所需的临界冲击速度.
结论:
- 实验结果与凝聚性包装上的粒子碰撞的数值模拟一致.
- 凝聚力在影响过程中修改粒子弹射动态方面发挥着至关重要的作用.
- 这些发现为模拟潮湿沙子的流运输提供了洞察力.
更多相关视频
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
13.3K
09:44Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
Published on: June 5, 2014
12.7K
相关概念视频
Impact
137
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
137
Elastic Collisions: Case Study
13.6K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
13.6K
