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 speed. 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 dissipation. 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.
Impact and interest:
Citation countsare sourced monthly fromand citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|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|
Repository Staff Only: item control page