Dynamic rheological properties of viscoelastic magnetic fluids in uniform magnetic fields |
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| Authors: | Hiroshi Yamaguchi Xiao-Dong Niu Xiao-Jiang Ye Mingjun Li Yuhiro Iwamoto |
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| Institution: | 1. Energy Conversion Research Center, Doshisha University, Kyoto, Japan;2. School of Science, Wuhan Institute of Technology, Wuhan, PR China;3. Department of Mechanical Engineering, Xiangtan University, Hunan, PR China |
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| Abstract: | The dynamic rheological properties of viscoelastic magnetic fluids in externally applied uniform magnetic fields are investigated by a laboratory-made cone-plate rheometer in this study. In particular, the effects of the magnetic field on the viscoelastic properties (the complex dynamic modulus) of the viscoelastic magnetic fluids are studied. In the investigation, three viscoelastic magnetic fluids are made by mixing a magnetic fluid and a viscoelastic fluid with different mass ratios. As a supplementation to the experimental investigation, a theoretical analysis is also presented. The present study shows that the viscosity and elasticity of the viscoelastic magnetic fluids are significantly influenced by the magnetic field and the concentrations of the magnetic particles in the test fluids. Theoretical analysis qualitatively explains the present findings. |
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| Keywords: | Viscoelatic magnetic fluid Storage modulus Loss modulus |
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