在重力和零重力条件下,状微毛细血管中的非湿的命运:动力学,非对称平衡分析和计算流体动力学验证
Amgad Salama1, Jisheng Kou2,3, Mohamed F El Amin4,5
1Mechanical Engineering Department, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5A9, Canada.
Langmuir : the ACS journal of surfaces and colloids
|February 21, 2024
概括
在线状毛细管中,由于毛细管的力量,不湿会向更宽的端移动. 引力引入新的行为,导致四种可能的结果,取决于修改的邦德号码.
科学领域:
- 流体动力学 流体动力学
- 毛细血管现象 毛细血管现象
- 接口科学 接口科学
背景情况:
- 圆毛细血管中的非湿液体体表现出由毛细血管力驱动的自我推进.
- 毛细血管力和重力之间的相互作用显著影响了的行为和最终状态.
研究的目的:
- 为了阐明平衡的配置和位置,一个 nonwetting slug 在一个收的毛细血管管.
- 调查重力对的运动的影响,并确定可能的结果.
- 在不同的引力和毛细血管条件下开发一种对的行为进行预测的框架.
主要方法:
- 实验和数值确定了的行为.
- 开发一个修改的邦德号码来量化引力与毛细血管力的比率.
- 计算流体动力学 (CFD) 分析用于模型验证.
主要成果:
- 在微重力下,向更宽的端移动,达到平衡,阴道形成单个球体.
- 在重力下,毛细血管主导,向更宽的端移动,但达到较低的平衡点.
- 当重力占主导地位时,向更窄的端移动,可能完全排水.
- 根据邦德号码确定了四种不同的的命运,并绘制了地图.
结论:
- 修改后的邦德号有效地预测了在重力下垂线状毛细血管中不湿的的行为.
- 引力引入了复杂的动态,扩大了可能的平衡状态,超出了简单的毛细血管驱动运动.
- 该研究提供了全面了解的行为,对于微流体和多相流应用至关重要.
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