Initial CFD investigation of an MR fluid in a bicycle ergometer
Kelson, Neil A., Doocey, Jacinta M., Rogers, Adam A., & Brown, Richard J. (2006) Initial CFD investigation of an MR fluid in a bicycle ergometer. In The 13th Biennial Computational Techniques and Applications Conference, 2-5 July 2006, James Cook University, Townsville, Queensland.
A bicycle ergometer is a scientific device used by exercise physiologists which attempts
to mimic on-road cycling characteristics such as foot technique, EMG activity,
VO2, VCO2 and rider cardiology in a laboratory environment. Presently
there are no known useful scientific ergometers that mimic these characteristics and
are able to provide a satisfactory controlled resistance that is independent of speed.
Previous research has suggested the use of a Magneto-Rheological (MR) Fluid as
part of the ergometer design, as when used in a rotary brake application it is able
to be controlled electronically to increase resistance instantly and independent of
In the target application, MR fluids are subject to immense tribological wear and
temperature during viscous shearing, and will eventually show some degree of deterioration
which is usually manifested as an increase in off-state viscosity. It is
not known exactly how the fluid fails, however the amount of deterioration is related
to the shear rate, temperature and duration and directly related to the power
Currently, there is very little literature that investigates the flow and thermal characteristics
of MR fluid tribology using CFD. In this paper, we present initial work that
aims to improve understanding of MR fluid wear via CFD modelling using Fluent,
and results from the model are compared with those obtained from a experimental
test rig of an MR fluid-based bicycle ergometer.
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|Item Type:||Conference Item (Presentation)|
|Additional Information:||The contents of this conference presentation can be freely accessed online via the conference web page (see Official URL).|
|Keywords:||microrheological fluid, Computational Fluid Dynamics, ergometer|
|Divisions:||Current > QUT Faculties and Divisions > Division of Technology, Information and Learning Support|
Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Research Centres > High Performance Computing and Research Support
|Deposited On:||27 Jul 2009 09:43|
|Last Modified:||18 Mar 2011 12:24|
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