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滴滴对超热颗粒床的影响的动态行为
Yunlong Jiao1, Xi Chen1, Xiaojun Liu1
1Institute of Tribology, Hefei University of Technology, Hefei 230009, China.
ACS applied materials & interfaces
|May 21, 2025
概括
滴滴对超热颗粒的影响显示了三个模式:扩散,反弹和挖掘. 最大扩散仅取决于撞击速度,而不是粒子温度或大小.
科学领域:
- 多相流动动力学 多相流动力学
- 热量和质量转移是热量和质量转移.
- 粒子-流体相互作用
背景情况:
- 滴滴对粒子的影响是常见的,但对于高温场景来说了解得很少.
- 莱登弗罗斯特效应在滴滴超热粒子相互作用中起作用.
研究的目的:
- 为了研究过热颗粒床上的滴滴撞击动态.
- 描述撞击模式,流体化和火山口形成.
- 了解诸如韦伯数和粒子大小等参数的影响.
主要方法:
- 实验观察滴滴对加热颗粒床的影响.
- 对撞击行为的分析,包括扩散,反弹和挖掘.
- 由此产生的火山口形态的表征.
主要成果:
- 确定了三个冲击模式:扩散,收缩反弹和沉浸挖掘.
- 观测到的火山口结构:甜甜圈,多孔和形.
- 最大扩散系数与韦伯数 (We) 相对应.
- 坑口直径与We相反相关.
- 增加的颗粒大小阻碍了流化.
- 最大扩散系数独立于粒子温度,大小和液体体积.
结论:
- 莱登弗罗斯特效应影响过热粒子上的滴滴行为.
- 撞击速度是最大滴滴传播的唯一决定因素.
- 粒子的温度和大小显著影响了石坑的形态和流体化.
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