Numerical modelling of liquid droplet dynamics in microgravity
Easter, S., Bojarevics, V. and Pericleous, K. (2011) Numerical modelling of liquid droplet dynamics in microgravity. Journal of Physics: Conference Series (JPCS), 327 (1):012027. ISSN 1742-6588 (Print), 1742-6596 (Online) (doi:10.1088/1742-6596/327/1/012027)
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Microgravity provides ideal experimental conditions for studying highly reactive and under-cooled materials where there is no contact between the sample and the other experimental apparatus. The non-contact conditions allow material properties to be measured from the oscillating liquid droplet response to perturbations. This work investigates the impact of a strong magnetic field on these measurement processes for weakly viscous, electrically conducting droplets. We present numerical results using an axisymmetric model that employs the pseudo-spectral collocation method and a recently developed 3D model. Both numerical models have been developed to solve the equations describing the coupled electromagnetic and fluid flow processes. The models represent the changing surface shape that results from the interaction between forces inside the droplet and the surface tension imposed boundary conditions. The models are used to examine the liquid droplet dynamics in a strong DC magnetic field. In each case the surface shape is decomposed into a superposition of spherical harmonic modes. The oscillation of the individual mode coefficients is then analysed to determine the oscillation frequencies and damping rates that are then compared to the low amplitude solutions predicted by the published analytical asymptotic theory.
|Additional Information:|| First published online: 6 December 2011.  Published as: Journal of Physics: Conference Series 327 (2011) 012027. In Journal of Physics: Conference Series (2011), Volume 327 - entitled International Symposium on Physical Sciences in Space, 11–15 July 2011, Bonn, Germany.  Published under licence in Journal of Physics: Conference Series by IOP Publishing Ltd. IOP Copyright Notice: Open access articles from IOP are published under a creative commons attribution licence or CC-BY Licence. This allows users to re-use the content in any way they like, provided it is accurately attributed. Copyright stays with the agreed copyright owner. This licence also makes us fully compliant with the RCUK's policy on open access.  This paper was first presented at the International Symposium on Physical Sciences in Space, held from 11–15 July 2011, Bonn, Germany.|
|Uncontrolled Keywords:||electromagnetic levitation, contactless property measurement, surface tension, microgravity, numerical modelling|
|Subjects:||Q Science > QA Mathematics|
|School / Department / Research Groups:||School of Computing & Mathematical Sciences|
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group
|Last Modified:||29 Jul 2013 15:34|
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