In this paper it is analysed the case of an oscillatory flow in a round pipe in which a magnetic flow is applied. In magnetorheological flows (MRF) the fluid develops yield stress, the strength of which depends on the intensity of the magnetic field. The analysis considers an oscillatory pressure gradient and an oscillatory magnetic field of different frequencies. It is investigated the effect of a cyclical yield stress on the frequency and amplitude of the flow velocity, including the phenomenon of resonance. In this study, the MFR is modelled as a Bingham fluid with time- dependent yield stress.

Volume Subject Area:
Fluids Engineering
Topics:
Flow (Dynamics), Magnetic fluids, Pipes, Yield stress, Fluids, Magnetic fields, Pressure gradient, Resonance
1.
Letelier M. F, Siginer D. A, Rouliez J.P and Corral O. F. (2005) “Mathematical modelling of magneto-hydrodynamic dampers with time-varying fluid properties”, ASME International Mechanical Engineering Congress and Exposition, paper 81172.
2.
Lee
D. Y
and
Wereley
N. M.
 (
1999
):
Quasi-steady Herschel-Bulkley analysis of electro and magneto-rheological flow mode dampers-journal of intell
.
Mar. Syst. And Struc.
Vol.
10
, pp
761
–
769
.
3.
Hong
S. B.
,
Choi
S. B.
,
Choi
Y. T
and
Wereley
N. M
 (
2003
):
Non-dimesional analysis for effective design of semi-active electrorheological damping control systems
. -
Proc. Instn. Mech. Engrs.
Vol.
217
, pp.
1095
–
1106
.
4.
Droguer
U.
,
Gordaninejad
F.
and
Evrensen
C. A.
 (
2003
):
A new magneto- rheological fluid damper for high-mobility multi-purpose wheeled vehicle (HMMMWV)- Smart Structure and materials 2003
,
Proceedings of SPIE
, vol
5052
. pp.
198
–
206
.
5.
Lee
D. Y
and
Wereley
N. M
 (
2000
):
Analysis of electro- and magneto-rheological flow mode dampers using Herschel- Bulkley model-smart
. Structures and Materials 2000,
Proceedings or SPIE
, vol.
3989
, pp
244
–
255
.
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