基于COMSOL的微流体逻辑门电路建模与仿真

Modeling and Simulation of Microfluidic Logic Gate Circuits Based on COMSOL

摘要: 微流体中液滴的行为不仅能够反映流体力学的基本特性，还为模拟数字数据处理提供了新的思路。液滴在微通道中的运动轨迹、相互作用时间以及与通道几何结构的交互，共同决定了微流体系统的特性。通过精确控制液体流速、通道的弯曲程度和尺寸，可以实现各种逻辑运算功能。由于液滴的动态特性可以类比为数字电路中的开关状态，微流体网络因此具备了模拟传统数字逻辑运算的潜力。例如，液滴的碰撞、合并或分裂等现象可以被视为数字电路中“0”和“1”之间的转换，从而实现与门(AND gate)和或门(OR gate)等基本逻辑门的功能。本文采用COMSOL软件构建了一种微流体模型，通过精确调控微通道的形状、液滴的速度及其他操作参数，成功模拟了与门和或门的逻辑功能，并通过一系列的动态模拟实验，验证了微流体系统在执行复杂逻辑任务中的可行性和有效性。这些研究不仅证明了微流体系统在数字逻辑运算中的应用潜力，还为微流体器件的设计与优化提供了理论依据，推动了微流体技术在生物医药、化学分析以及微型计算系统等领域的应用发展。

Abstract: The behavior of droplets in microfluidics not only reflects the fundamental characteristics of fluid dynamics but also provides a new approach for simulating digital data processing. The motion trajectory, interaction time, and the interaction with the geometric structure of the microchannel collectively determine the properties of the microfluidic system. By precisely controlling the liquid flow rate, the degree of curvature of the channel, and the size, various logic operations can be realized. Since the dynamic characteristics of droplets can be analogized to the switch states in digital circuits, microfluidic networks have the potential to simulate traditional digital logic operations. For example, phenomena such as droplet collisions, merging, or splitting can be viewed as the conversion between “0” and “1” in digital circuits, thus implementing basic logic gates such as AND gates and OR gates. In this study, a microfluidic model was constructed using COMSOL software. By precisely controlling the shape of the microchannel, the speed of droplets, and other operational parameters, the logic functions of AND and OR gates were successfully simulated. A series of dynamic simulation experiments were conducted to verify the feasibility and effectiveness of the microfluidic system in executing complex logical tasks. These results not only demonstrate the application potential of microfluidic systems in digital logic operations but also provide a theoretical basis for the design and optimization of microfluidic devices, advancing the application of microfluidic technology in fields such as biomedicine, chemical analysis, and miniature computing systems.