Discrete element study of liquid-solid slurry flows through constricted channels


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Abbas, Micheline and Hoef van der, Martin and Bokhove, Onno and Kuipers, Hans (2009) Discrete element study of liquid-solid slurry flows through constricted channels. In: 6th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion, 11-15 July 2009, Xi'an, China.

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Abstract:Discrete element model is used to simulate the flow of liquid-granule mixtures in an inclined channel containing a linear contraction. All the relevant particle/particle and particle/fluid interactions are included in the numerical model. The presence of the contraction induces different steady morphologies of the solid phase or the mixture depending on whether closed or open channels are used. These flows behave quite differently depending on the upstream Froude number and the contraction size ratio. The model is first validated by comparing with the existing results for dry granular (glass particles) chute flows (Vreman et al., 2007). Then simulations of a chute of glass particles in water flowing in a closed channel are compared to the dry granular case. With the same solid flux at the inlet, the hydrodynamic forces in the liquid-solid mixture induce higher particle solid volume fractions in the part of the flow containing the solid phase. The streamwise particle velocity (resp. depth of the solid phase) has the same evolution along the channel with smaller (larger) values than in the dry granular flow case.
Item Type:Conference or Workshop Item
Copyright:© 2009 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/67391
Official URL:http://dx.doi.org/10.1063/1.3366386
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Metis ID: 263172