Force effects on rotor of squeeze film damper using Newtonian and non-Newtonian fluid

Šedivý, Dominik; Ferfecki, Petr; Fialová, Simona

doi:10.1063/1.5004368

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2018

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“…For the mixed viscosity the Bingham rheology model applies which was defined in work [1]. This model was also used in paper [7]. The model is described by equation:…”

Section: Mathematical Model Of Fluidmentioning

confidence: 99%

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Influence of Eccentricity and Angular Velocity on Force Effects on Rotor of Magnetorheological Damper

2018

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Abstract. This article presents the evaluation of force effects on squeeze film damper rotor. The rotor is placed eccentrically and its motion is translate-circular. The amplitude of rotor motion is smaller than its initial eccentricity. The force effects are calculated from pressure and viscous forces which were measured by using computational modeling. Damper was filled with magnetorheological fluid. Viscosity of this nonNewtonian fluid is given using Bingham rheology model. Yield stress is not constant and it is a function of magnetic induction which is described by many variables. The most important variables of magnetic induction are electric current and gap width between rotor and stator. The simulations were made in finite volume method based solver. The motion of the inner ring of squeeze film damper was carried out by dynamic mesh. Numerical solution was solved for five different initial eccentricities and angular velocities of rotor motion.

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“…For the mixed viscosity the Bingham rheology model applies which was defined in work [1]. This model was also used in paper [7]. The model is described by equation:…”

Section: Mathematical Model Of Fluidmentioning

confidence: 99%

“…An interaction between surface wettability and MR fluids was solved in works [5,6]. Force effects on squeeze film damper were studied in paper [7].This article continues in research, which was started in work [7].…”

Section: Introductionmentioning

confidence: 98%