粘弹性流体滴落到基板上的流体动力学
Konstantinos Zinelis1,2, Thomas Abadie3, Gareth H McKinley2
1Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK. k.zinelis17@imperial.ac.uk.
Soft matter
|October 4, 2024
概括
本研究使用计算流体动力学来理解滴在基板上的 (DoS) 技术来测量复杂的流体延伸性风湿学. 这些发现有助于优化DoS用于分析低粘度的非牛顿流体.
科学领域:
- 流体力学 流体力学 流体力学
- 类风病学 类风病学 类风病学
- 计算科学 计算科学
背景情况:
- 复杂流体的延伸流在喷雾和微流体等工业过程中至关重要.
- 滴在基板上 (DoS) 技术通过毛细管驱动的丝线稀释探测低粘度的非牛顿流体的扩展性质学.
- 在测量稀释溶液的扩展性质方面,DoS比商业风力计具有优势.
研究的目的:
- 通过计算来研究调控DoS技术的流体力学.
- 了解表面张力,弹性,有限链延伸性,重力和基板湿透性在DoS动态中的作用.
- 开发一个框架来优化和扩展DoS协议的性能.
主要方法:
- 利用适应性精细的,依赖时间的轴对称数值模拟与开源的欧勒尔代码,Basilisk.
- 采用流体体积技术进行界面跟踪和日志形状转换,以获得稳定的粘弹性构成方程解决方案.
- 开发了一个1D模型,以捕捉从惯性-毛细管平衡到非线性elasto-毛细管体制的稀释动态.
主要成果:
- 确定了控制拉斯托-毛细血管 (EC) 系统的关键力量,以及重力和可湿性对稀释和剥离的影响.
- 一维模型成功地捕捉了初始稀释和过渡到非线性EC制度.
- 基于FENE-P流体溶液的适配方法被提议用于准确的放松时间的确定.
结论:
- 计算类风湿学为DoS技术的流体力学提供了关键的见解.
- 了解这些动态可以改善DoS的优化和应用,用于复杂流体的表征.
- 拟议的装配方法提高了确定延伸放松时间的准确性.
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