A Numerical Study of Frost Layer Growth with Improved Lattice Boltzmann Enthalpy Method

doi:10.19596/j.cnki.1001-246x.7856

Abstract

Abstract: Influence of wall surface on growth of frost layer is studied by using mesoscale lattice Boltzmann method. Nucleation probability model is coupled with improved enthalpy model. A lattice Boltzmann model of frost layer growth process based on nucleation probability theory is established. It simulates thickening of frost layer growth on macro scale, and dynamic change of frost layer structure caused by growth of ice branches in microscale as well. Average thickness, average density and frosting amount of frost layer are obtained. Formation and growth of frost layer on cold wall surface are studied. Temporal and spatial evolution of topological structure of frost layer are obtained. Average thickness, average density and average solid volume fraction of frost at different time were calculated and effects of cold wall surface temperature, relative humidity and cold surface infiltration on frost were discussed.

Key words: lattice Boltzmann model, nucleation probability model, improved enthalpy model, frost, surface infiltration

CLC Number:

O513

CUI Jing, YANG Tinghao, YANG Fan, LI Hulin, YANG Guangfeng. A Numerical Study of Frost Layer Growth with Improved Lattice Boltzmann Enthalpy Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(3): 323-334.

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