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Granular jet impact: probing the ideal fluid description

Published online by Cambridge University Press:  24 June 2014

Patric Müller ,
Arno Formella  and
Thorsten Pöschel
Patric Müller*
Affiliation:
Institute for Multiscale Simulation, Universität Erlangen-Nürnberg, 91052 Erlangen, Germany
Arno Formella
Affiliation:
Universidad de Vigo, Department of Computer Science, Ourense, Spain
Thorsten Pöschel
Affiliation:
Institute for Multiscale Simulation, Universität Erlangen-Nürnberg, 91052 Erlangen, Germany
*
†Email address for correspondence: patric.mueller@cbi.uni-erlangen.de
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Abstract

We investigate the impact of a granular jet on a finite target by means of particle simulations. The resulting hydrodynamic fields are compared with theoretical predictions for the corresponding flow of an incompressible and rotation-free fluid. The degree of coincidence between the field obtained from the discrete granular system and the idealized continuous fluid flow depends on the characteristics of the granular system, such as granularity, packing fraction, inelasticity of collisions, friction and target size. In certain limits we observe a granular–continuum transition under which the geometric and dynamic properties of the particle jet and the fluid jet become almost identical.

JFM classification

Complex Fluids: Complex Fluids Granular media: Granular media Wakes/Jets: Jets
Type
Papers
Information
Journal of Fluid Mechanics , Volume 751 , 25 July 2014 , pp. 601 - 626
Copyright
© 2014 Cambridge University Press 

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