马兰戈尼在波形轮热基板上的双层液态微薄膜接口中流动
Shubham Agrawal1, Prasanta K Das2, Purbarun Dhar1
1Hydrodynamics and Thermal Multiphysics Lab (HTML), Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
Langmuir : the ACS journal of surfaces and colloids
|September 22, 2023
概括
这项研究研究了在有图案的基板上的二元液体薄膜中的热马兰戈尼水力学. 热导率和Biot数等关键参数影响面张力驱动的流量,对于微流体和涂层应用至关重要.
科学领域:
- 流体动力学 流体动力学
- 热传递是一种热传递.
- 接口现象 接口现象
背景情况:
- 热马兰戈尼水力动力学在具有温度梯度的薄膜系统中至关重要.
- 应用包括微电子机械系统 (MEMS/NEMS) 和生物细胞分类.
- 有图案的表面诱导温度梯度,驱动界面流.
研究的目的:
- 在一个不可混合的二元液体薄膜系统中分析热马兰戈尼水力学.
- 为了研究相对导热率 (k),薄膜厚度比 (r) 和Biot数 (Bi) 对流动力学的影响.
- 为了获得热和水力动力运输的近似分析解决方案.
主要方法:
- 使用扰动技术解决合的纳维埃-斯托克斯和能量方程.
- 分析k,r和Bi的参数影响.
- 研究由于基板拓学的界面张力波动.
主要成果:
- 马兰戈尼的流强度随着相对导热率 (k) 的增加而下降.
- 薄膜厚度比 (r) 对马兰戈尼流量的影响取决于k.
- 较高的生物数 (Bi) 通过减少界面温度波动来削弱马兰戈尼流.
结论:
- 该研究提供了关于在有图案的薄膜系统中控制马兰戈尼水力学方面的见解.
- 这些发现与优化液体薄膜涂层和微流体设备有关.
- 了解参数的影响是设计高级应用程序的关键.
相关概念视频
01:17Steady, Laminar Flow Between Parallel Plates
222
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
222
01:22Couette Flow
305
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
305