Design and Analysis of a Three-Dimensional Biomimetic Micromixer Based on Murray's Law
Zhong Chen, Rui Peng, Xin GaoIntroduction:
Micromixers are pivotal components in microfluidic systems, with broad applications in chemical synthesis, pharmaceutical processes, bioanalysis, and microparticle fabrication. To achieve high-efficiency mixing, this study proposes a novel three-dimensional biomimetic micromixer whose geometry is innovatively designed based on Murray's law—a principle governing optimal fluid transport in biological vascular networks.
Methods:
The mixing performance, characterized by mixing efficiency and pressure drop, was systematically investigated through numerical simulations. The study focused on the effects of critical structural parameters, namely the number of mixing layers and the bifurcation angle. A comprehensive comparison with a conventional Y-type bifurcation mixer was also conducted.
results:
The study generated specific results regarding the mixing efficiency, pressure drop characteristics, and outlet concentration distribution of the proposed three-forked biomimetic blade micromixer. These results were directly compared against those of the conventional Y-type micromixer, highlighting the performance differences associated with varying the bifurcation angles in the biomimetic design.
Results:
The results demonstrate that increasing the number of layers enhances mixing performance. More importantly, among the tested bifurcation angles (30°, 60°, and 90°), the structure with a 60° angle and three layers exhibits the optimal performance, achieving a high mixing efficiency of 97.9%.
Discussion:
This work confirms the significant potential of applying biomimetic Murray's law to the structural optimization of microfluidic devices. The novel design presented herein holds potential for patent protection due to its unique biomimetic flow-path configuration. The findings suggest that this bio-inspired geometric principle can effectively address mixing challenges at the microscale.
Conclusion:
The proposed micromixer design provides an effective strategy for designing high- -performance mixing devices. The optimal structure (60° bifurcation angle, three layers) offers valuable insights for the development of advanced microfluidic systems, and its innovative architecture may form the basis of a future patent application.