Blood microfluidic system for magnetic fluid tube wall

X. H. Liu - X. Y. He - W. L. Wang - Y. Wu - X. B. Han - J. Qi - B. Xu

School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai, People's Republic of China

Abstract
In recent years, advancements have been made in solid tube-wall microfluidic channel technology, however, significant technical barriers still exist. A recentarticle published in Nature discusses the micro pump without a solid tube wall, elaborating on a new technologythat involves the creation of miniature water-soluble channels using magnetic fluids. The study demonstrates that these miniature channels can effectively shield blood from damage and prevent the formation of thrombus. Based on this pioneering work, the article redesigned a stable magnetic circuit to enhance the stability of the magnetic field and improve flow quality. The validity of this concept is supported by a comprehensive coupled simulation of the magnetic field and flow field. The research findings confirm that the integration of a new magnetic field enables the correct flow of blood and magnetic fluid within the micro fluidic channels. This validates the feasibility of liquid tube-wall microfluidic channels and their ability to enhance the blood flow velocity, thus improving transportation efficiency while preserving the original function. Figs 4, Refs 28.