纳米毛囊芯 - 无混合活性和非活性液体的年轮流动触发器 无外部驱动器的纳米流体液体运输
1Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, United States.
Langmuir : the ACS journal of surfaces and colloids
|March 17, 2025
概括
具有自生成流量的活性液体可以在没有外力的情况下在纳米毛细管中驱动不混合的液体. 这项研究探讨了核心-环状传输,揭示了活性粒子度和粘度如何影响潜在纳米流体应用的流体动力学.
科学领域:
- 纳米流体的使用方法
- 活动物质物理学 活动物质物理学
- 流体动力学 流体动力学
背景情况:
- 具有自行运动粒子的活性液体表现出复杂的行为.
- 纳米级流体运输对于微流体设备至关重要.
- 在各种工业过程中,核心 - 环流配置是相关的.
研究的目的:
- 开发用于纳米毛细管核心-环状运输的活性和非活性不混合液体的分析解决方案.
- 为了研究在纳米毛细管中由活性颗粒产生的自我诱导的压力驱动流.
- 分析活性液体层厚度,粘度比和墙壁滑动对流体运输的影响.
主要方法:
- 在纳米毛细管中开发用于双相流的分析解决方案.
- 活性液体与形缺陷和诱导极化场的建模.
- 分析核心-环形配置与核心或环形区域的活性液体.
- 研究各种参数的影响,如活性,粘度比和滑动长度.
主要成果:
- 活性流动驱动非活性流体运输在两个核心-环形配置,没有外部强迫.
- 在充足的活性颗粒度下,可实现非活性液体的显著体积流速.
- 增加活性液体层厚度可以提高整体流量,但不单调地影响非活性流量.
- 活性:非活性液体粘度比在活性液体处于核心时,对运输产生重大影响.
- 墙壁滑动条件会根据配置不同地影响速度场和流量.
结论:
- 在纳米毛细管中自诱导的流体运输是可行的,使用活性液体.
- 活性和非活性液体的配置,以及物理参数,决定了流动特性.
- 分析解决方案为理解和潜在地控制活性系统中的纳米流体运输提供了一个框架.
相关概念视频
01:19Capillarity in Fluid
91
Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
91
01:17Steady, Laminar Flow Between Parallel Plates
112
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.
112
01:20Characteristics of Fluids
3.7K
When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
3.7K
01:07Laminar and Turbulent Flow
8.3K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
8.3K
01:23Steady, Laminar Flow in Circular Tubes
133
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is...
133
01:22Couette Flow
168
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...
168