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Boundary conditions and heat resistance at the moving solid–liquid interface

Author

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  • Buchbinder, G.L.
  • Galenko, P.K.

Abstract

Boundary conditions for the solid–liquid interface of the solidifying pure melt have been derived. In the derivation the model of Gibbs interface is used. The boundary conditions include both the state quantities of bulk phases are taken at the interface and the quantities characterizing interfacial surface such as the surface temperature and the surface heat flux. Introduction of the surface temperature as an independent variable allows us to describe the scattering energy at the interface. For the steady-state motion of the planar interface the expression for the temperature discontinuity across the phase boundary has been obtained. Effect of Kapitza resistance on the interface velocity is considered. It is shown that heat resistance leads to non-linearity in solidification kinetics, namely, in “velocity-undercooling” relationship. The conditions of the steady-state motion of the planar interface have been found.

Suggested Citation

  • Buchbinder, G.L. & Galenko, P.K., 2018. "Boundary conditions and heat resistance at the moving solid–liquid interface," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 489(C), pages 149-162.
    • Handle: RePEc:eee:phsmap:v:489:y:2018:i:c:p:149-162
    DOI: 10.1016/j.physa.2017.08.001
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