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Impact of increased particle concentration on magnetorheological fluid properties and their damping performance

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Abstract

Magnetorheological (MR) fluid properties are essential in analyzing the performance of any MR fluid system. The fluid properties are dependent on shape, size, and magnetic saturation of the magnetic particles. Preliminary characteristics with SEM, particle size analysis (PSA), and vibration sample magnetometer (VSM) on carbonyl iron particles were performed to verify the particle’s feasibility to synthesize the MR fluid in a laboratory. Synthesis and characterization of MR fluids with particle concentrations (PC) of 10% (PC10), 15% (PC15), 20% (PC20), 30% (PC30), and 35% (PC35) by volume are carried out. To show the inherent nonlinearity of the MR fluid, Herschel–Bulkley model is used. The relationship between sedimentation velocity, yield stress, and thermal conductivity is established as a function of particle concentration with experimental uncertainty of 6.15, 5, and 8.96%, respectively. Functional testing of PC15 and PC30 was carried out on an MR damper fabricated on dimensions obtained from the literature for the required size. The results indicate that damping force is 42% more in PC30 than PC15 at higher loading parameters. Finally, the saturation magnetization of the MR fluid depends not only on applied current but also on loading parameters when operating in the system.

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Abbreviations

τ:

Shear stress (Pa)

τH :

Field (H)-dependent flow stress (Pa)

\(\dot{\gamma }\) :

Rate of shear(s−1)

K:

Consistency index

n :

Flow behavior index

Kp :

Particle thermal conductivity

Kf :

Fluid thermal conductivity

\(\phi\) :

Particle concentration

N:

Particle shape

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Acknowledgements

The authors acknowledge the Ministry of Human Resource Development and Ministry of Road Transport and Highways, Government of India, supporting this research through IMPRINT Project Fund No. IMPRINT/2016/7330 titled “Development of Cost-Effective Magnetorheological (MR.) Fluid Damper in Two wheelers and Four Wheelers Automobile to Improve Ride Comfort and Stability.”

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  1. Department of Mechanical Engineering, National Institute of Technology Surathkal, Mangalore, India

    Ashok Kumar Kariganaur, Hemantha Kumar & M. Arun

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  1. Ashok Kumar Kariganaur
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Kariganaur, A.K., Kumar, H. & Arun, M. Impact of increased particle concentration on magnetorheological fluid properties and their damping performance. Korea-Aust. Rheol. J. 34, 223–238 (2022). https://doi.org/10.1007/s13367-022-00029-8

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