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First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

HEAT TRANSFER ANALYSIS OF SOLID PARTICLES DURING MELTING AND SEDIMENTATION IN A LIQUID POOL

DOI: 10.1615/TFESC1.mph.012922
pages 1847-1850

Hamidreza Shabgard
Department of Mechanical Engineering and Mechanics Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA

Matthew McCarthy
Department of Mechanical Engineering and Mechanics Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA

Ying Sun
Department of Mechanical Engineering and Mechanics Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA


KEY WORDS: Slurry flow, Arbitrary-Lagrangian-Eulerian method, Phase change, Heat transfer

Abstract

A CFD analysis is presented for the melting of solid particles during sedimentation in their own melt. The motion of the solid particles is determined using the Lagrangian approach with buoyancy and viscous and pressure drag forces acting on the particles. Hydrodynamics and heat transfer throughout the fluid are determined from the solution of the Navier-Stokes and energy equations using a finite volume scheme. Particle and fluid motions are two-way coupled through moving solid-liquid interfaces, whose morphologies are determined from the local interfacial heat flux. A deforming grid is employed to handle the motion and deformation of the solid-liquid interface. In order to assess the effect of phase change and sedimentation on heat transfer, single-phase flow and slurry flow without sedimentation are also studied. It is found that the presence of particles of a phase change material enhances the heat transfer between the bulk fluid and the heating surfaces due to improved mixing as well as heat sink effect. Quantitatively, more than 100% enhancement in average wall Nusselt number was achieved by using a slurry flow with 6% solid volume fraction compared to the single-phase flow.

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