VP1-09 The behavior of magnetic emulsions in microchannels under the influence of an inhomogeneous magnetic field
Creators: Evgeniy Sokolov
Darya Kalyuzhnaya
Petr Ryapolov
Publisher: name: IEEE
Year: 2025

Magnetic emulsions are a liquid composite medium, one of the phases of which is represented by a magnetic nanocolloid. A unique feature of these media is the presence of pronounced magnetic properties [1, 2]. Magnetic emulsions are a promising material for targeted drug delivery [3]. Their production can be carried out in various ways, for example, mechanical dispersion [4] or emulsification using microfluidic chips [5]. The production of magnetic emulsions is usually carried out by dispersing magnetic fluids based on hydrocarbons in water [2]. Emulsions in which the dispersed phase is formed by water and the dispersion medium by a hydrocarbon magnetic fluid are less common and have been studied to a much lesser extent. The most original variants are emulsions using water-based magnetic fluids [6], as well as emulsions obtained using other polar liquids. The theoretical and experimental formation of emulsions using a magnetic fluid in a vertical microchannel under the influence of an inhomogeneous magnetic field is considered in this paper. The magnetic field has a focusing effect and helps to control the size of the emulsion droplets and their dynamics. The source of the magnetic field is represented as a combination of a solenoid, on top of which there is an annular permanent magnet. An experiment was conducted and a simulation of the system was carried out in the femm software package. Modeling of a water drop in a kerosene-based magnetic fluid under the influence of a combined magnetic field source is shown in Fig. 1. The effect of the ponderomotor force is described in detail. The forces acting on both non-magnetic droplets floating in a magnetic fluid and drops of magnetic fluid floating in a non-magnetic liquid medium are determined. The results contribute to the further development of detailed mechanisms for the formation of emulsions based on magnetic fluid, and their size control in real time.References: 1. X. Huang, M. Saadat, M. A. Bijarchi, Chemical Engineering Science., Vol. 270, p. 118519 (2023) 2. S. A. Suslov, ASME Journal of Heat and Mass Transfer., Vol. 145, p. 030801 (2023) 3. E. Elkalla, S. Khizar, Z. Ait-Touchente, Emergent Materials., Vol. 6, p. 2027-2039 (2023) 4. A. R. Zakinyan, A. A. Zakinyan, Sensors and Actuators A: Physical., Vol. 314, p. 112347 (2020) 5. S. Kahkeshani, D. Di Carlo, Lab on a Chip., Vol. 16, p. 2474-2480 (2016) 6. D. Kalyuzhnaya, E. Sokolov, A. Vasilyeva, Fluids., Vol. 8, p. 42 (2023)
Magnetic emulsions are a liquid composite medium, one of the phases of which is represented by a magnetic nanocolloid. A unique feature of these media is the presence of pronounced magnetic properties [1, 2]. Magnetic emulsions are a promising material for targeted drug delivery [3]. Their production can be carried out in various ways, for example, mechanical dispersion [4] or emulsification using microfluidic chips [5]. The production of magnetic emulsions is usually carried out by dispersing magnetic fluids based on hydrocarbons in water [2]. Emulsions in which the dispersed phase is formed by water and the dispersion medium by a hydrocarbon magnetic fluid are less common and have been studied to a much lesser extent. The most original variants are emulsions using water-based magnetic fluids [6], as well as emulsions obtained using other polar liquids. The theoretical and experimental formation of emulsions using a magnetic fluid in a vertical microchannel under the influence of an inhomogeneous magnetic field is considered in this paper. The magnetic field has a focusing effect and helps to control the size of the emulsion droplets and their dynamics. The source of the magnetic field is represented as a combination of a solenoid, on top of which there is an annular permanent magnet. An experiment was conducted and a simulation of the system was carried out in the femm software package. Modeling of a water drop in a kerosene-based magnetic fluid under the influence of a combined magnetic field source is shown in Fig. 1. The effect of the ponderomotor force is described in detail. The forces acting on both non-magnetic droplets floating in a magnetic fluid and drops of magnetic fluid floating in a non-magnetic liquid medium are determined. The results contribute to the further development of detailed mechanisms for the formation of emulsions based on magnetic fluid, and their size control in real time.References: 1. X. Huang, M. Saadat, M. A. Bijarchi, Chemical Engineering Science., Vol. 270, p. 118519 (2023) 2. S. A. Suslov, ASME Journal of Heat and Mass Transfer., Vol. 145, p. 030801 (2023) 3. E. Elkalla, S. Khizar, Z. Ait-Touchente, Emergent Materials., Vol. 6, p. 2027-2039 (2023) 4. A. R. Zakinyan, A. A. Zakinyan, Sensors and Actuators A: Physical., Vol. 314, p. 112347 (2020) 5. S. Kahkeshani, D. Di Carlo, Lab on a Chip., Vol. 16, p. 2474-2480 (2016) 6. D. Kalyuzhnaya, E. Sokolov, A. Vasilyeva, Fluids., Vol. 8, p. 42 (2023)