A Model of the Defrost Process
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A model of frost melting is developed from fundamental analysis of the heat and mass transfer. The melting model envisions three stages as the frosted surface is heated: absorption of the melt water by diffusion, accumulation of the melt water, and draining of the melt water along the surface. The three stages of melting are connected physically, but the analysis of each involves a particular set of assumptions and use of a wide range parameters and physical laws. Surface wettability enters the analysis as a factor in the draining stage. The possibility of frost slumping is expressed through a criterion based on a static force balance in which contact angel is an implicit factor.
KeywordsDefrost Process Permeation Layer Defrost Time Frost Layer Meltwater Drainage
- 74.Aoki K, Hattori M, Ujiie T (1988) Snow melting by heating from the bottom surface. JSME Int J 31(2):269–275Google Scholar
- 75.Colbeck SC, Davidson G (1972) Water percolation through homogeneous snow. IASH Publication 107:242–257Google Scholar
- 99.Lauga E, Brenner MP, Stone HA (2005) Chapter 15: Microfluidics: the no-slip boundary condition. In: Foss J, Tropes C, Yarin A (eds) Handbook of experimental fluid dynamics. Springer, New YorkGoogle Scholar