Numerical investigation on mixing intensification of ferrofluid and deionized water inside a microchannel using magnetic actuation generated by embedded microcoils for lab-on-chip systems

Magnetofluidic mixing of a ferrofluid droplet under the influence of a time-dependent external field

“…This particular assumption is valid for cases where the magnetization of the flow domain is below the saturation magnetization, which is the case for the present study as well (cf. figure 1a) (Saadat, Shafii & Ghassemi 2020). UsingB = ∇ ×Ā in (3.13), the component of the magnetic force (F m ) in the X and Y directions, respectively, can be written as (Wen et al 2011;Nouri et al 2017)…”

“…As already mentioned before, the ferrofluid is allotted a scalar concentration value of C = 1, while the fluorescent DI-water is allotted a scalar concentration of C = 0. For the magnetic field simulations, the magnetic insulation boundary condition (n ×Ā = 0) is applied at the surrounding air (readers are referred to § 1 of the supplementary material for a description of this boundary condition) (Griffiths 2017;Nouri et al 2017;Saadat et al 2020). To solve the complex two-way coupled nonlinear governing equations (3.5)-(3.9), we have used the computational framework of COMSOL Multiphyscis ® .…”

Biomedical Applications of Magnetic Levitation

“…[ 78 ] These manipulations have applications in magnetic separation, [ 79–82 ] droplet manipulation, [ 83–85 ] focusing and sorting, [ 86,87 ] detection, [ 88,89 ] and mixing. [ 90–93 ]…”

“…[78] These manipulations have applications in magnetic separation, [79][80][81][82] droplet manipulation, [83][84][85] focusing and sorting, [86,87] detection, [88,89] and mixing. [90][91][92][93] The magnetic susceptibility difference between the object and the medium, under a magnetic field, is exploited to suspend particles, [37] which is either based on positive or negative magnetophoresis. In positive magnetophoresis, paramagnetic materials are manipulated in a diamagnetic medium.…”

Lab-on-a-chip technologies for food safety, processing, and packaging applications: a review

“…The integration of nanotechnology has developed sensors in providing a significant enhancement to overall performance. For instance, techniques involving nano-biosensors using magnetic beads and quantum dots have gained a lot of interest in recent years (Mekkaoui et al 2018 ; Moerland et al 2019 ; Saadat et al 2020 ). The portable device primarily includes two inlets, one outlet, and a detection source.…”