Dissipative particle dynamics simulation of magnetorheological fluids in shear flow
- 22 Downloads
In the present study, the behavior of a magnetorheological fluid (MRF) in shear flow is investigated using dissipative particle dynamics (DPD), a particle-based method. The solid particles in the MRF are modeled by a magnetization model, and Lennard-Jones potential is used to simulate the interaction between the solid and the liquid phases. The columnar structure (chain) of the solid particles along the applied magnetic field direction is modeled that is similar to previous experimental observations. Subsequently, this complex fluid is simulated under shear flow and the velocity profiles depict the “plug region”. The effect of shear rate and area fraction on the rheological properties is investigated by Irving–Kirkwood model. The DPD simulation results indicate a shear-thinning and viscoplastic behavior of MRF which is similar to experimental reports. Following, the effect of magnetization of solid particles is also studied and it is shown that the MR effect is significantly dependent to the solid particle magnetism. Furthermore, the results show that the viscosity of base fluid has a considerable effect on the dynamic range of this smart fluid.
KeywordsDissipative particle dynamics Magnetorheological fluid Coarse-grained method Shear-thinning regime
The authors would like to express their gratitude to Professor Nhan Phan-Thien (National University of Singapore) for his valuable discussions and guidance during the present research.
- 9.Deshmukh SS (2007) Development, characterization and applications of magnetorheological fluid based “smart” materials on the macro-to-micro scale. Massachusetts Institute of Technology. http://hdl.handle.net/1721.1/38697
- 13.Ahmadkhanlou F (2008) Design, modeling and control of magnetorheological fluid-based force feedback dampers for telerobotic systems. The Ohio State University, ColumbusGoogle Scholar
- 14.Carlson D, Marjoram B, Toscano J, Leroy D, Burson K, St Clair K, Kintz A (2007) Magneto-rheological technology and applications. https://www.lord.com/
- 15.Oh JK, Park JM (2011) Iron oxide-based superparamagnetic polymeric nanomaterials: design, preparation, and biomedical application. Prog Polym Sci 36:168–189. https://doi.org/10.1016/j.progpolymsci.2010.08.005 CrossRefGoogle Scholar
- 56.Satoh A (2011) Introduction to practice of molecular simulation. Elsevier, New York. https://doi.org/10.1016/b978-0-12-385148-2.00008-2 CrossRefGoogle Scholar
- 58.Rosenweig RE (1985) Ferrohydrodynamics. Cambridge University Press, CambridgeGoogle Scholar