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Abstract

The chain formation process of ferromagnetic particles under an applied magnetic field is simulated. Three main forces - magnetic force, viscous force, and repelling force, are considered. A model to simulate the motion of particles is proposed based on the analysis of the dynamics of the particles, and a corresponding numerical approach is developed. The formation of particle chains in magnetorheological (MR) fluids under an applied magnetic field is simulated, and the result agrees well with the experimental observation. The developed method is significant for the analysis of the overall behavior of MR fluids and their microscopic mechanisms as well as the effects of the influencing factors, which may be helpful for the design of new MR fluids.

Keywords

magnetorheological fluids magnetic dipole chain formation simulation

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References

Furst, E.M. and Gast, A.P. 2000a. “Micromechanics of Magneto-Rheological Suspensions,” Physical Review E, 61(6): 6732-6739 .

Furst, E.M. and Gast, A.P. 2000b. “Dynamics and Lateral Interactions of Dipolar Chains,” Physical Review E, 62(5): 6916-6925 .

Gans, B.J. , Duin, N.J. , Ende, D. and Mellema, J. 2000. “The Influence of Particle Size on the Magneto-Rheological Properties of an Inverse Ferrofluid,” J. Chem. Phys., 113(5): 2032-2042 .

Huang, J. and Duan, H. 2001. “Design of a New Device for Testing Properties of MR Fluids,” MD Dissertation, Chongqing Institute of Technology, Chongqing.

Huang, J. , He, J.M. and Zhang, J.Q. 2004. “Viscoplastic Flow of the MR Fluid in a Cylindrical Valve,” Key Engineering Materials, 276: 969-974 .

Hu, N. and Molinari, J.F. 2004. “Shear Bands in Dense Metallic Granular Materials,” Journal of the Mechanics and Physics of Solids, 3: 499-531 .

Ly, H.V. , Reitich, F. , Jolly, M.R. , Banks, H.T. and Ito, K. 1999. “Simulations of Particle Dynamics in Magnetorheological Fluids,” Journal of Computational Physics, 155: 160-177 .

Mohebi, M. , Jamasbi, N. and Liu, J. 1996. “Simulation of the Formation of Nonequilibrium Structures in Magnetorheological Fluids Subject to an External Magnetic Field,” Phys. Rev. E, 54: 5407 .

Popplewelly, J. and Rosensweig, R.E. 1996. “Magnetorheological Fluid Composites,” J. Phys. D: Appl. Phys., 29: 2297-2303 .

10.

Melle, S. , Calderon, O.G. , Rubiob, M.A. and Fuller, G.G. 2002. “Rotational Dynamics in Dipolar Colloidal Suspensions: Video Microscopy Experiments and Simulations Results,” J. Non-Newtonian Fluid Mech, 102: 135-148 .

11.

Wu, J. , Chen, J. and Yang, Y. 2003. “Method and Application of Discrete Element Model for Granular Flow,” Modern Chemical Industry, 23: 56-58 .

12.

Wu, W. 1983. Fluid Mechanics, Beijing University Press, Beijing, China (in Chinese) .

13.

Yang, S. , Gong, J. , Zhang, W. , Wang, R. and Wang, H. 1998. “Monte Carlo Simulations to Influence of Magnetic Field Strength on Aggregate Structure of Ferromagnetic Particles in Magnetorheological Fluids,” Chinese Journal of Atomic and Molecular Physics, 15(3): 411-415 .

Simulation of the Chain-formation Process in Magnetic Fields

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