相关实验视频

Updated: Jul 15, 2025

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

多个结构参数对带有阻隔器,障碍物和差距的微混合器性能的影响

Jiacheng Nai¹, Feng Zhang¹, Peng Dong²

¹Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.

|September 28, 2023

概括

研究人员优化了方形腔微混合器,以提高微流体系统的混合性能. 关键的结构变化,如分歧长度和障碍比率,显著提高了混合效率,为被动微混合器设计提供了宝贵的见解.

科学领域:

微流体学微流体学
化学工程是化学工程的重要组成部分.
生物技术是生物技术.

背景情况:

微混合器对于化学和生物分析中的芯片实验室和微流体系统至关重要.
提高微流体设备的混合效率对于各种应用至关重要.

研究的目的:

调查结构参数对微混合器性能的影响.
为了优化方形腔微混合器的设计,以提高混合.
分析混合指数和压力下降之间的权衡.

主要方法:

具有不同结构参数的方形腔微混合器的数值模拟.
评估波形长度,障碍物长度与宽度的比,以及间隙宽度.
在一个雷诺兹数范围 (Re = 0.1 到 60) 中进行分析.

主要成果:

混合指数随着阻隔线的长度和障碍物长度与宽度的比率而增加.
混合指数随着差距宽度的增加而下降.
最佳参数 (偏差距长度150微米,障碍物L/W比率600/100,间隙宽度200微米) 在Re ≥ 20时实现混合指数>0.98.
压力下降与阻隔器长度和障碍物长度与宽度的比率成正比.

结论:

结构修改,包括阻隔器和障碍物,显著提高了微混合器的性能.
较长的分歧,更大的障碍面积比率和更窄的间隙改善了混合.
优化微混合器设计需要平衡高混合指数与可接受的压力下降.
这些发现为被动微混合器提供了设计指南.

关键词:

这是一个令人费解的困惑.微型混合机微型混合机混合指数的混合指数数字模拟的数字模拟.障碍物是一个障碍.

更多相关视频

One-Step Approach to Fabricating Polydimethylsiloxane Microfluidic Channels of Different Geometric Sections by Sequential Wet Etching Processes

One-Step Approach to Fabricating Polydimethylsiloxane Microfluidic Channels of Different Geometric Sections by Sequential Wet Etching Processes

Published on: September 13, 2018

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

相关概念视频

Steady, Laminar Flow Between Parallel Plates

Steady, Laminar Flow Between Parallel Plates

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.

Steady, Laminar Flow in Circular Tubes

Steady, Laminar Flow in Circular Tubes

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...