Total magnetic force on a ferrofluid droplet in microgravity

Romero-Calvo, Álvaro; Cano-Gómez, Gabriel; Hermans, Tim H. J.; Benítez, Lidia Parrilla; Herrada, Miguel A.; Castro-Hernández, Elena

doi:10.1016/j.expthermflusci.2020.110124

Cited by 15 publications

(16 citation statements)

References 25 publications

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“…Since the magnetic susceptibility of the liquids employed in this experiment is of the order of ± 10 −5 , the magnetic properties of the system can be computed without accounting for the influence of the magnetization field M on H or the magnetic normal traction term at the liquid-gas interface. This effectively uncouples the fluidmagnetic problem and simplifies the modeling of the system, ultimately enabling the adoption of the external magnetic field H 0 produced by a magnet in a non-polarized environment 53 .…”

Section: Magnetic Environmentmentioning

confidence: 99%

Magnetic phase separation in microgravity

et al. 2022

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The absence of strong buoyancy forces severely complicates the management of multiphase flows in microgravity. Different types of space systems, ranging from in-space propulsion to life support, are negatively impacted by this effect. Multiple approaches have been developed to achieve phase separation in microgravity, whereas they usually lack the robustness, efficiency, or stability that is desirable in most applications. Complementary to existing methods, the use of magnetic polarization has been recently proposed to passively induce phase separation in electrolytic cells and other two-phase flow devices. This article illustrates the dia- and paramagnetic phase separation mechanism on MilliQ water, an aqueous MnSO4 solution, lysogeny broth, and olive oil using air bubbles in a series of drop tower experiments. Expressions for the magnetic terminal bubble velocity are derived and validated and several wall–bubble and multi-bubble magnetic interactions are reported. Ultimately, the analysis demonstrates the feasibility of the dia- and paramagnetic phase separation approach, providing a key advancement for the development of future space systems.

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Section: Magnetic Environmentmentioning

confidence: 99%

Magnetic phase separation in microgravity

et al. 2022

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“…An encastre boundary condition is applied to the upper face of the plastic ring to simulate the presence of the rail. Quadrilateral (1542) and triangular (34) elements are employed in the mesh. The maximum compression stress suffered by the plastic ring is 8 MPa, while the aluminum box is subjected to a maximum stress of 1.1 MPa.…”

Section: Structurementioning

confidence: 99%

StELIUM: A student experiment to investigate the sloshing of magnetic liquids in microgravity

et al. 2020

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“…[ 5–9 ] Its versatility has led to its use in diverse fields such as lubrication, [ 5,9,10 ] heat removal, [ 11–13 ] actuation, [ 9,14–19 ] micromechanics, [ 20–24 ] and even space‐related endeavors. [ 25,26 ] Notably, the thermomagnetic effect, which refers to the temperature‐dependent magnetic susceptibility of ferrofluid, played a key role in the invention of ferrofluid. This effect enables the fluid to circulate without the need for gravity or mechanical pumps, as it responds to changes in temperature.…”

Section: Introductionmentioning

confidence: 99%

Spinning a Liquid Wheel and Driving Surface Thermomagnetic Convection with Light

Liu,

Lin,

Qin

et al. 2023

Advanced Materials

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A typical Tesla thermomagnetic engine employs a solid magnetic wheel to convert thermal energy into mechanical energy, while thermomagnetic convection in ferrofluid is still challenging to observe because it is a volume convection that occurs in an enclosed space. Using a water‐based ferrofluid, we demonstrate a liquid Tesla thermomagnetic engine and report the observation of thermomagnetic convection on a free surface. Both types of fluid motions are driven by light and observed by simply placing ferrofluid on a cylindrical magnet. The surface thermomagnetic convection on the free surface is made possible by eliminating the Marangoni effect, while the spinning of the liquid wheel is achieved through the solid‐like behavior of the ferrofluid under a strong magnetic field. Increasing the magnetic field reveals a transition from simple thermomagnetic convection to a combination of the central spin of the spiky wheel surrounded by thermomagnetic convection in the outer region of the ferrofluid. We further demonstrate the coupling between multiple ferrofluid wheels through a fluid bridge. These demonstrations not only unveil the unique properties of ferrofluid but also provide a new platform for studying complex fluid dynamics and thermomagnetic convection, opening up exciting opportunities for light‐controlled fluid actuation and soft robotics.This article is protected by copyright. All rights reserved

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Total magnetic force on a ferrofluid droplet in microgravity

Cited by 15 publications

References 25 publications

Magnetic phase separation in microgravity

Magnetic phase separation in microgravity

StELIUM: A student experiment to investigate the sloshing of magnetic liquids in microgravity

Spinning a Liquid Wheel and Driving Surface Thermomagnetic Convection with Light

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