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Fluids
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The Recent Advances in Magnetorheological Fluids
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The Recent Advances in Magnetorheological Fluids

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: closed (15 December 2023) | Viewed by 7102

Special Issue Editors

Dr. Mario Versaci

E-Mail Website
Guest Editor
Dipartimento di Ingegneria Civile Energia Ambiente e Materiali (DICEAM), “Mediterranea” University, 89122 Reggio Calabria, Italy
Interests: magnetorheological fluids; theoretical models for magnetorheological fluids; experimental models for magnetorheological fluids; magnetorheological fluids for industrial applications
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Annunziata Palumbo

E-Mail Website
Guest Editor
Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, 98166 Messina, Italy
Interests: physical-mathematical models for magnetorheological fluids; Thermodynamic theories for fluids; rheological models for biological fluids; nonlinear waves propagation

Special Issue Information

Dear Colleagues,

Today, magnetorheological fluids represent one of the most important frontiers in industrial fluid engineering, especially in those fields where a high performance with reduced maintenance costs is required. However, the theoretical models of these fluids, due to their high computational complexity, are not suitable for industrial applications and possible technological transfers. The aim of this Special Issue is to share  original ideas with researchers in order to find a meeting point between theoretical and experimental models for possible industrial implications.

Dr. Mario Versaci
Prof. Dr. Annunziata Palumbo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (4 papers)

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Research

31 pages, 4443 KiB  
Article
A Novel Design Concept of a Magnetorheological Fluid-Based Damper Utilizing the Porous Medium for Implementation in Small-Scale Applications
by Aditya Suryadi Tan, Thomas Sattel and Richard Subianto
Fluids 2023, 8(7), 203; https://0-doi-org.brum.beds.ac.uk/10.3390/fluids8070203 - 07 Jul 2023
Viewed by 902
Abstract
Magnetorheological (MR) dampers have a virtue over conventional dampers, where their damping properties can be adjusted using a magnetic field. However, MR dampers have been barely implemented in small vibratory systems, in which the modal mass and stiffness are relatively small. This is [...] Read more.
Magnetorheological (MR) dampers have a virtue over conventional dampers, where their damping properties can be adjusted using a magnetic field. However, MR dampers have been barely implemented in small vibratory systems, in which the modal mass and stiffness are relatively small. This is due to two major reasons, namely its high parasitic damping force and big moving mass. When such an MR damper is installed in a small vibratory system, the system‘s default damping ratio is increased and therefore its dynamic is reduced. Here, a new concept of an MR damper utilizing the porous medium and shear operating mode together with an external non-moving electromagnet is proposed. This combination results in an MR damper with a low parasitic damping force and a small moving mass. For comparison purposes, a benchmark MR damper with comparable geometry is constructed. The proposed MR damper possesses a passive friction force that is 8× smaller and OFF-state passive viscous damping that is 10–20× smaller than the benchmark MR damper. An investigation of the proposed MR damper performance in a test vibratory system shows almost no reduction of the system dynamic. Therefore, this proposed MR damper configuration can be suitable for applications in small vibratory systems. Full article
(This article belongs to the Special Issue The Recent Advances in Magnetorheological Fluids)
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19 pages, 4589 KiB  
Article
Modeling and Experimental Characterization of a Clutch Control Strategy Using a Magnetorheological Fluid
by Grazia Lo Sciuto, Paweł Kowol and Giacomo Capizzi
Fluids 2023, 8(5), 145; https://0-doi-org.brum.beds.ac.uk/10.3390/fluids8050145 - 29 Apr 2023
Cited by 1 | Viewed by 1145
Abstract
In this paper, the characterization of a new clutch control strategy by means of a magnetorheological fluid (MR) has been investigated. The clutch system was designed and manufactured in the laboratory in order to determine its static and dynamic characteristics. As a result [...] Read more.
In this paper, the characterization of a new clutch control strategy by means of a magnetorheological fluid (MR) has been investigated. The clutch system was designed and manufactured in the laboratory in order to determine its static and dynamic characteristics. As a result of experimental measurements, the torque control of the developed MR clutch was determined in the frequency and time domains, as were the analytical relationships describing the connection between the control and controlled variables. The obtained results demonstrate that the analytical models are in good agreement with the experimental data, with an overall error of about 7%. Full article
(This article belongs to the Special Issue The Recent Advances in Magnetorheological Fluids)
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12 pages, 773 KiB  
Article
Numerical Simulation of Mixing Fluid with Ferrofluid in a Magnetic Field Using the Meshless SPH Method
by Mohsen Abdolahzadeh, Ali Tayebi, Mehrdad Ahmadinejad and Božidar Šarler
Fluids 2022, 7(11), 341; https://0-doi-org.brum.beds.ac.uk/10.3390/fluids7110341 - 29 Oct 2022
Cited by 1 | Viewed by 1579
Abstract
In this study, a numerical investigation of the effect of different magnetic fields on ferrofluid-fluid mixing processes in a two-dimensional microchannel is performed An improved version of smoothed particle hydrodynamics, SPH, by shifting particle algorithm and dummy particle boundary condition, is implemented to [...] Read more.
In this study, a numerical investigation of the effect of different magnetic fields on ferrofluid-fluid mixing processes in a two-dimensional microchannel is performed An improved version of smoothed particle hydrodynamics, SPH, by shifting particle algorithm and dummy particle boundary condition, is implemented to solve numerical continuity, ferrohydrodynamics-based momentum and mass transfer equations. SPH is formulated through the irregular arrangement of the nodes where the fields are approximated using the fifth-order Wendland kernel function. After validating the computational approach, the influence of the number (from one to three) of parallel electrical wires positioned perpendicular to the microchannel on the mixing efficiency is studied for the first time. It has originally been found that the mixing efficiency highly non-linearly depends on the Reynolds number and the number of electrical wires. For Re ≤ 20 the mixing efficiency is almost the same for two and three electrical wires and about two times higher than one electrical wire. For Re ≥ 80, the mixing efficiency of three wires is much higher than one and two electrical wires. Optimum performance of the micromixer is achieved with three electrical wires, since the mixer performs well on a broader range of Re than the other two studied cases. The outcomes of this study, obtained by a meshless method, are important for the industrial design of micromixers. Full article
(This article belongs to the Special Issue The Recent Advances in Magnetorheological Fluids)
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36 pages, 4901 KiB  
Article
Magnetohydrodynamics Solver for a Two-Phase Free Surface Flow Developed in OpenFOAM
by Victoria Suponitsky, Ivan V. Khalzov and Eldad J. Avital
Fluids 2022, 7(7), 210; https://0-doi-org.brum.beds.ac.uk/10.3390/fluids7070210 - 21 Jun 2022
Cited by 5 | Viewed by 2811
Abstract
A magnetohydrodynamics solver (“mhdCompressibleInterFoam”) has been developed for a compressible two-phase flow with a free surface by extending “compressibleInterFoam” solver within OpenFOAM suite. The primary goal is to develop a tool to simulate compression of magnetic fields in vacuum and simplified magnetized plasma [...] Read more.
A magnetohydrodynamics solver (“mhdCompressibleInterFoam”) has been developed for a compressible two-phase flow with a free surface by extending “compressibleInterFoam” solver within OpenFOAM suite. The primary goal is to develop a tool to simulate compression of magnetic fields in vacuum and simplified magnetized plasma targets by imploding rotating liquid metal liners in the context of a Magnetized Target Fusion (MTF) concept in pursuit by General Fusion Inc. At present, the solver is limited to axisymmetric problems and the magnetic field evolution is solved in terms of toroidal field component and poloidal flux functions. The solver has been validated and verified using a number of test cases for which analytical or other numerical solutions are provided. Those tests cases include: (i) compression of toroidal and poloidal magnetic fields in vacuum and cylindrical geometry, (ii) axisymmetric annular Hartmann flow, and (iii) compression of magnetized target initialized with a Grad–Shafranov equilibrium state in a cylindrical geometry. A methodology to incorporate conductive solid regions into simulation has also been developed. Capability of the code is demonstrated by simulating a complex case of compressing a magnetized target, which is injected during implosion of a rotating liquid metal liner with an initially soaked poloidal magnetic field. An application of the solver to simulate compression of a magnetized target in a geometry and parameters relevant to the Fusion Demonstration Plant (FDP) being developed by General Fusion Inc. is also demonstrated. Full article
(This article belongs to the Special Issue The Recent Advances in Magnetorheological Fluids)
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