Work

Effects of Geometric Parameters on Mixing Efficiency and Optimization in Variable Cross Section Microchannels

Year: 2025

Type: article

Abstract: Micromixers are important devices used in many fields for various applications which provide high mixing efficiencies and reduce the amount of reagents and samples. In addition, effective premixing of reactants is essential for obtaining high reaction rates. In order to further improve the mixing performance, three-dimensional numerical simulations and optimizations of the flow and mixing characteristics within a variable cross section T-shaped micromixer were carried out. The effects of the geometric parameters containing channel diameter, channel shape, channel contraction and expansion ratio, and number of expansion units on the mixing were investigated with the evaluation criteria of mixing index and performance index. The optimized geometric parameters of the channel were a diameter of 0.2 mm, the shape of Sem channel, an expansion ratio of 1:3, and a number of expansion units of 7, respectively. It can be showed that the mixing efficiency of the optimized micromixer was greatly improved, and the mixing index at different velocities could reach up to more than 0.98.

Source: Micromachines

DOI: 10.3390/mi16091001

Authors: Lijun Yang, Yu Hang, Renjie Liu, Zongan Li, Ye Wu

Institutions: Nanjing Institute of Technology, Nanjing Normal University of Special Education, Nanjing Normal University

Language: English

Topic: Microfluidic and Capillary Electrophoresis Applications

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,534

Funders: Nanjing Normal University, National Natural Science Foundation of China, Government of Jiangsu Province, Nanjing Institute of Technology