Vapor Snakes in Solid Argon
1963; American Institute of Physics; Volume: 38; Issue: 4 Linguagem: Inglês
10.1063/1.1733792
ISSN1520-9032
AutoresGerald L. Pollack, H. P. Broida,
Tópico(s)Heat Transfer and Boiling Studies
ResumoVapor snakes in argon near its triple-point temperature and below are described. An application of conservation of energy gives the ratio of the vapor core of the snake to the thickness of the solid wall as a simple function of the vapor and solid density and heats of fusion and vaporization. For snake growth near the triple point the essential contraction below the crust is due to solidification of the melt on the cold walls. For this case application of volume and mass conservation gives an equation for the velocity of snake growth in terms of the rate of solidification and radius of the snake. Motion picture films are used to measure the radius, wall thickness, and velocity of the snake as well as the rate of solid formation on the walls. The equations are examined and found to be in good agreement with experiment. Other qualitative and quantitative aspects of vapor snakes are described.
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