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Second Thermal and Fluids Engineering  Conference

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

PORE-SCALE SIMULATION OF ICE MELTING PROCESS IN POROUS MEDIA

Pu He
Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

Li Chen
Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

Yu-Tong Mu
Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

Wen-Quan Tao
Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

Abstract

A pore-scale model combining the Lattice Boltzmann method (LBM) and enthalpy-based method (EBM) is established to investigate the ice melting process in porous media with or without distributed carbon particles. This model is consisted of coupled flow fluid, heat transfer and melting process and is used to study the effects of conduction and convection on the melting process. The results agree well with the analytical model. Effects of thermal diffusivity, porosity, Rayleigh number on the melting rate, temperature distribution and Nusselt number are investigated. It is found that the melting rate can be significantly promoted by decreasing the porosity of porous media under a fixed Rayleigh number, but the Rayleigh number has little effect on the melting rate in porous media except the case without carbon particles. The natural convection has insignificant effect on the temperature distribution in porous media, while the carbon particles have important effect on the temperature distribution of the porous media.

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