Numerical simulation of droplet formation in a microfluidicdevice in the presence of a magnetic field in a T-shapedmicrochannel

One of the most popular subfields in microfluidics involves droplets. Theobjectives are to create droplets with regulated volume and frequency andaccurately manipulate and control each droplet. A study of the dropletformation process and a knowledge of the microfluidic design's structureare essential for successfully manipulating each droplet. In this work, thegeneration of droplets with varying frequencies and sizes in a channel ofconcentrated flow has been quantitatively investigated. The simple andquick Level-Set Method, based on the finite element method andavailable in the COMSOL Multiphysics ۵.۳ program, was utilized forthis purpose and to solve the two-phase fluid field. Initially, in theabsence of a magnetic field, a reduction in the dimensionless volume ofthe droplets was seen by adding a rectangle-circle appendage and alteringthe shape. The impact of the appendage's dimensionless height and widthwas also considered. The results revealed that the influence of height atits minimum and maximum values decreased the dimensionless volumeby ۹ and ۵۸%, respectively. In addition, raising the magnetic receptivitylevels while maintaining the capillarity results in a ۱۰% increase indroplet volume. In contrast, the droplet volume rises by ۲۱% when themagnetic band expands.

Keywords:

Microfluidics , Droplet , Finite Element Method , Magnetic field