Behavioral model for magnetorheological fluid under a magnetic field using Lekner summation method

Jang, Kyung In; Seok, Jongwon; Min, Byung Kwon; Lee, Sang Jo

doi:10.1016/j.jmmm.2008.10.046

Cited by 20 publications

(13 citation statements)

References 23 publications

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“…where g xy and h are the shear strain and the distance between neighbor particles in the x and z directions, respectively, and d ¼ D P /h is the dimensionless particle diameter [11]. In these equations, a superscript symbol (or number) in parenthesis means the direction (or function identification number) indicated by the superscript.…”

Section: Analytic Procedures For Model Developmentmentioning

confidence: 99%

“…Over the past decade, considerable research has been devoted to the intrinsic non-linear characteristics of MR fluids used in brakes and dampers [3][4][5][6][7][8][9][10][11][12][13]. In the earlier stages of this research, MR fluid models were based mainly on idealized rheological behavior, with some parameters derived from experiment.…”

Section: Introductionmentioning

confidence: 99%

“…Because this model is based on continuum mechanics coupled to the Maxwell stress tensor, it could provide only a macroscopic behavioral description of the MR fluid. Jang et al [11] modeled the behavior of MR fluids in arbitrarily skewed 3-D magnetic and shear strain fields. Their model assumes that the MR fluid is formed of equally spaced infinite chain-like particle structures configured under a skewed external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A behavior model of a magnetorheological fluid in direct shear mode

Jang

Min

Seok

2011

Journal of Magnetism and Magnetic Materials

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Section: Analytic Procedures For Model Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A behavior model of a magnetorheological fluid in direct shear mode

Jang

Min

Seok

2011

Journal of Magnetism and Magnetic Materials

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“…Kuzhir et al 2009 have investigated axisymmetric flow of a MR fluid through an orifice experimentally and the effect of an external magnetic field, transverse to the flow, was also examined in their paper. Jang et al 2009 have proposed in their study a new model to predict the behavior of MR fluid under arbitrary 3D magnetic and shear strain fields using Lekner summation method. Viscosity testing of MR fluid for different magnetic fields was studied by Roszkowski et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation on Laminar Pipe Flow of Magneto-Rheological Fluids under Applied External Magnetic Field

Gedik

2017

JAFM

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An experimental and numerical study of Magnetorheological (MR) fluids flow in circular pipes under the influence of uniform magnetic field is considered. In the experiments, an electromagnetic device was manufactured to generate the magnetic field. The experiments were performed using magnetic fields B= 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.12 and 0.15 T. Numerical study was performed to show the accuracy of the results obtained from experimental study. In numerical study, Computational Fluid Dynamics (CFD) analysis was used. The ANSYS Fluent 14.0 code based on the finite volume method was used for the CFD analysis. In the experiments, the applied magnetic field decreased the flow rate of the fluids by increasing viscosity. In case of 10 mm pipe diameter, the flow velocity of the A, B and C fluids were obtained as 0.593, 0.749 and 0.938 m/s respectively in situation B=0 T. When magnetic field was applied as B=0.15 T, decreases have occurred in the velocity of A, B and C fluids as 95.27%, 90.24% and 85.6% respectively. Similarly, in case of 15 mm pipe diameter, 96.87%, 95.06% and 90.76% decreases have occurred in the flow velocity of A, B and C fluids having 0.301, 0.363 and 0.445 m/s flow velocity respectively. The results were compared for the magnetic field values B=0, 0.05, 0.10 and 0.15 T. It was found that the differences between experimental and numerical study were found as 6.10% and 1.71% for the B=0 T and B≠0 T situations respectively when the pipe has 10 mm pipe diameter. In case of 15 mm pipe diameter, the differences were found as 2.31% and 0.89%. As a result, it was found that the results obtained from experimental and numerical study were qualitatively and quantitatively in good agreement.

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“…Furst and Gast [31] previously applied the same general technique but used the force to shear a chain of particles. The model of Jang et al [32] uses a more sophisticated approach to calculating the interparticle forces, based on a lattice model of the magnetic particles. Ginder and Davis [33] calculated the interparticle forces and resulting shear stresses in a MR fluid using a finite-element technique.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Magnetorheological Fluids by the Discrete Element Method

Kargulewicz

Iordanoff

Marrero

et al. 2012

Journal of Tribology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Modeling of Magnetorheological Fluids by the Discrete Element MethodMagnetorheological (MR) fluids are fluids whose properties vary in response to an applied magnetic field. Such fluids are typically composed of microscopic iron particles ($ 1 À 20 lm diameter, 20 À 40% by volume) suspended in a carrier fluid such as mineral oil or water. MR fluids are increasingly proposed for use in various mechanical system applications, many of which fall in the domain of tribology, such as smart dampers and clutches, prosthetic articulations, and controllable polishing fluids. The goal of this study is to present an overview of the topic to the tribology audience, and to develop an MR fluid model from the microscopic point of view using the discrete element method (DEM), with a long range objective to better optimize and understand MR fluid behavior in such tribological applications. As in most DEM studies, inter-particle forces are determined by a force-displacement law and trajectories are calculated using Newton's second law. In this study, particle magnetization and magnetic interactions between particles have been added to the discrete element code. The global behavior of the MR fluid can be analyzed by examining the time evolution of the ensemble of particles. Microscopically, the known behavior is observed: particles align themselves with the external magnetic field. Macroscopically, averaging over a number of particles and a significant time interval, effective viscosity increases significantly when an external magnetic field is applied. These preliminary results would appear to establish that the DEM is a promising method to study MR fluids at the microscopic and macroscopic scales as an aid to tribological design.

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Behavioral model for magnetorheological fluid under a magnetic field using Lekner summation method

Cited by 20 publications

References 23 publications

A behavior model of a magnetorheological fluid in direct shear mode

A behavior model of a magnetorheological fluid in direct shear mode

Experimental and Numerical Investigation on Laminar Pipe Flow of Magneto-Rheological Fluids under Applied External Magnetic Field

Modeling of Magnetorheological Fluids by the Discrete Element Method

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