Mathematical modelling of magneto-hydrodynamic dampers with time-varying fluid properties

Mario F. Letelier, Jean Paul Rouliez, Dennis A. Siginer, Omar F. Corral

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

The fluid dynamics of dampers is investigated for the case where the damping fluid flows through passages in which a magnetic field is applied. This is a specific case of a new and promising field of applications that has emerged through the design of devices that take advantage of some properties of the so-called electrorheological fluids and magnetorheological fluids (ERF and MRF). These fluids are created when a base fluid is seed with very small dielectric or iron particles, so that it reacts to electric or magnetic fields by developing some non-Newtonian characteristics, most prominently a yield stress, viscosity change, and also viscoelasticity. These fluid properties can be controlled through control of the electric or magnetic fields' strength. In this paper, a typical damping load is modeled and related to the required flow of a MRF inside the damper. To this end the fluid is modeled as a Bingham fluid with time-varying yield-stress. The analysis here developed makes it possible to determine the magnetic field variation necessary in order to achieve a specific displacement of the damper's piston. The flow equations are analytically solved for any time-history of the dimensionless fluid's yield-stress. Main results are some simplified relationships that correlate damping load and magnetic field time-variations. These results aim at providing analytical tools that may facilitate dampers' design.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Pages913-918
Number of pages6
Volume261 FED
DOIs
Publication statusPublished - Dec 1 2005
Event2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005 - Orlando, FL, United States
Duration: Nov 5 2005Nov 11 2005

Other

Other2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005
CountryUnited States
CityOrlando, FL
Period11/5/0511/11/05

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Letelier, M. F., Rouliez, J. P., Siginer, D. A., & Corral, O. F. (2005). Mathematical modelling of magneto-hydrodynamic dampers with time-varying fluid properties. In American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED (Vol. 261 FED, pp. 913-918) https://doi.org/10.1115/IMECE2005-81172