Response of Viscous Damping of Dashpot Containing Hybrid Nanofluid

Authors

  • Hayder Abdul khaliq Ali Department of Mechanical Engineering, Mustansiriyah University, Baghdad, Iraq
  • Mayyadah S. Abed Department of Materials Engineering, University of Technology, Iraq
  • Adil Abed Nayeeif Department of Mechanical Engineering, Mustansiriyah University, Baghdad, Iraq

Keywords:

nano-fluid, MWCNTs, free and forced vibration of rigid-body, logarithmic decrement

Abstract

This work aimed to enhance the viscous damping of the oil shock absorbers by adding (1,2,3,4,5) vol% of single-phase fumed silica or precipitated silica to the hydraulic oil. Hybrid phases were also used (functionalized MWCNT and fumed silica) as 5 vol% as total volume fraction adding. Nanofluid was prepared by using Ultrasonic Probe Sonicator. The effect of different additive concentrations of nano structure to the pure hydraulic oil of dashpot (damper) was tested by the free damping vibration rigid body beam apparatus. The decayed in amplitude cycles are recorded by pen recorder at the free end of the rigid beam. Damping coefficients, maximum overshoot and settling time for both kinds of nanofluid was calculated. Comparative study was investigated among the damping coefficient responses respect with each other. The obtained results indicate that the energy dissipated by viscous damping friction was decreased at different concentrations of nanostructure (single-phase and hybrid) dispersed in oil of the apparatus dashpot. The single-phase of 5 vol% MWCNTs and 0% of silica (0S5C) exhibits significant enhancement in response specifications and steady-state (such as maximum overshoot and settling time) of the rigid beam body. Due to the different behavior during damping test, rheological properties were also investigated for the hybrid nanofluid to sense and explain the damping results.

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Published

2020-12-29

How to Cite

Abdul khaliq Ali, H. ., S. Abed, M. ., & Nayeeif, . A. A. . (2020). Response of Viscous Damping of Dashpot Containing Hybrid Nanofluid. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 67(1), 52–65. Retrieved from https://www.akademiabaru.com/submit/index.php/arfmts/article/view/2837
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