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Granular dynamics of a vibrated bed of dumbbells
journal contribution
posted on 2010-07-08, 12:56 authored by Ricky D. Wildman, J. Beecham, T.L. FreemanA two-dimensional vibrated bed of dumbbells was investigated using
experiment and numerical simulation. Experimentally, high speed photography
in combination with image analysis and tracking software was used to determine
the location of the centre of mass and the locations and direction of motion of
the component particles of the dumbbells. Numerically, a geometry analogous to
that used experimentally was employed and the equations of motion for each of
the particles were solved using the distinct element method. It was found that,
despite some differences, the numerical simulations agreed reasonably well with
the experimental results. Subsequently, the simulation method was used to explore
the behaviour of the bed over a range of densities. The moments of the velocity
distributions were determined as a function of height for a range of numbers
of particles, and it was found that a normal distribution of velocities is a good
approximation, except close to the vibrating base where there were suggestions
that the distribution of the vertical component of the velocities is a composite of
two sets of particles, one pre-collision with the base, and the other post-collision.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
WILDMAN, R.D., BEECHAM, J. and FREEMAN, T.L., 2009. Granular dynamics of a vibrated bed of dumbbells. European Physical Journal Special Topics, 179(1), pp. 5-17Publisher
© Springer VerlagVersion
- AM (Accepted Manuscript)
Publication date
2009Notes
This journal was published in European Physical Journal Special Topics [© Springer Verlag] and the original publication is available at www.springerlink.com.ISSN
1951-6355;1951-6401Language
- en