Flow Analysis and Modeling of Magneto-Rheological Fluids

Gao, Hongjing; Yang, Fan; Qu, Dong-Qi

doi:10.2991/eame-15.2015.193

Cited by 3 publications

(5 citation statements)

References 5 publications

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“…Therefore, in the present study, the analysis of the annular gap is assumed to be the flow between two parallel plates. This assumption can be made by referring to the study of Gao et al [7]. The gap height used in the present study is chosen from the study of Parlak and Engin [1].…”

Section: Analysis Conditionsmentioning

confidence: 99%

“…The implementation of the current numerical methodology can be seen in the literature. Gao et al [7] are implemented the numerical method for the modeling of piston gap flow of MR dampers. By modeling the piston gap with both cylindrical coordinate system and cartesian coordinate system, they found approximate same velocity fields.…”

Section: Discretization Of the Shear Rate Magnitudementioning

confidence: 99%

“…On the contrary to this, in figure 16, the zero-gradient plug flow regions are arisen because of the very high viscosity. Therefore, the shear stresses can be transported with a very small change in the velocity gradient and a very high value of viscosity, τ = η γ. Gao et al [7] investigate the effect of the Reynolds number on the plug flow boundaries. They showed as the Reynolds number increases, the plug flow boundaries get near to the central axis of parallel plate geometry.…”

Section: Analyses With Other Flow Schemesmentioning

confidence: 99%

“…The modeling of the MR fluids is usually being made with the Herschel-Bulkley (HB) viscosity model as it considers the shear-thinning (pseudoplastic) and shear-thickening (dilatant) properties. Gao et al [7] mentioned that the Bingham plastic model can be incapable of modeling MR fluids as they can show shear-thinning or shear-thickening properties in their viscosity characteristics. They realized CFD analysis of MR fluid flow through a channel for both annuli and parallel plate assumption under a known pressure difference.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Investigation of a non-Newtonian MR fluid flow between parallel plates by developed CFD code for different numerical schemes

ÖNEN¹,

Parlak²

2022

Smart Mater. Struct.

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Magnetorheological (MR) fluids are composed of a solution of micron-sized magnetizable particles dispersed in a carrier fluid, typically oil. Thus, the MR fluids are classified as smart fluids by showing varying apparent viscosity under a precisely controllable external magnetic field. This feature of the MR fluids gave the possibility to use them in the MR dampers to control variational damping forces. In this work, an MR damper on relatively small scales is considered to investigate the MR fluid flow behavior through the piston annuli where the magnetic field exists. This work mainly focuses on the numerical solutions of the flow variables in a magnetically excited non-Newtonian flow medium by comparing analytical results for various Reynolds numbers. The Herschel-Bulkley (HB) viscous model is used for the non-Newtonian characteristic of the MR fluid. For the numerical modeling of the HB viscous model, the regularized approaches are used to avoid numerical errors. However, on the contrary to the actual HB model, the regularized models can be incapable to give true apparent viscous values at very low shear rates depending on the regularization parameters. Thus, the present study aims to give a better understanding of choosing the optimal regularization parameters for the studied flow conditions. The second part of the study discusses the numerical discretization schemes aiming to present their performances while changing the Reynolds number between 0.002-1. In this manner, a CFD solver has been developed for two-dimensional geometries which are meshed with structured grids by using six different discretization schemes including two of the most known Total Variation Diminishing (TVD) schemes. For simplicity of the problem, a two-dimensional between parallel plates geometry and a constant magnitude of the magnetic field intensity along the piston annuli is assumed. The study also summarizes the CFD technique by evaluating the physical meaning of the flow field variables.

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Section: Analysis Conditionsmentioning

confidence: 99%

Section: Discretization Of the Shear Rate Magnitudementioning

confidence: 99%

Section: Analyses With Other Flow Schemesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of a non-Newtonian MR fluid flow between parallel plates by developed CFD code for different numerical schemes

ÖNEN¹,

Parlak²

2022

Smart Mater. Struct.

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“…These fluids usually consist of micron-sized polarizable and magnetizable solid particles dissolved in a nonconducting liquid like mineral or silicone oil. EMR fluids also offer an innovative potential for quick and adaptively controllable electro-magneto-mechanical interfaces in control units when used in suitable devices 7,8 . A coupled electro-magneto-rheological theory is needed to model such EMR fluids within the framework of the continuum mechanics-based approach.…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling of an electro-magneto-rheological fluid: A continuum mechanics approach

Kumar

Sarangi

2021

Preprint

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The present article deals with a continuum mechanics-based method to model an electro-magneto-rheological (EMR) fluid deformation under an electromagnetic field. The proposed method follows the fundamental laws of physics, including the principles of thermodynamics. We start with the general balance laws for mass, linear momentum, angular momentum, energy, and the second law of thermodynamics in the form of Clausius-Duhem inequality with Maxwell’s equations. Then, we derive the generalized constitutive relation for EMR fluids following the representation theorem. To validate of the same, the developed constitutive relation is applied to an electro-rheological fluid valve system. The analytical predictions of the considered system are consistent with the experimentation. At last, we simulate different velocity profiles from the developed constitutive relation in the case of the parallel plate configuration. As a result, we succeed in providing more physics-based analytical findings than the existing studies in the literature.

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Constitutive modeling of an electro-magneto-rheological fluid

Kumar

Sarangi

2022

Sci Rep

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The present article deals with a continuum mechanics-based method to model an electro-magneto-rheological (EMR) fluid deformation subjected to an electromagnetic field. The proposed method follows the fundamental laws of physics, including the principles of thermodynamics. We start with the general balance laws for mass, linear momentum, angular momentum, energy, and the second law of thermodynamics in the form of Clausius–Duhem inequality with Maxwell’s equations. Then, we formulated a generalized constitutive model for EMR fluids following the representation theorem. Later, we validate the model with the results of an EMR rheometer and ER fluid valve system-based configurations. At last, the possible simulation-based velocity profiles are also discussed for parallel plate configuration. As a result, we succeed in providing more physics-based analytical findings than the existing studies in the literature.

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Flow Analysis and Modeling of Magneto-Rheological Fluids

Abstract: Abstract-The

Cited by 3 publications

References 5 publications

Investigation of a non-Newtonian MR fluid flow between parallel plates by developed CFD code for different numerical schemes

Investigation of a non-Newtonian MR fluid flow between parallel plates by developed CFD code for different numerical schemes

Constitutive modeling of an electro-magneto-rheological fluid: A continuum mechanics approach

Constitutive modeling of an electro-magneto-rheological fluid

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