Direct contact melting due to a permeable rotating disk


Turkyilmazoglu M.

PHYSICS OF FLUIDS, cilt.31, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1063/1.5086724
  • Dergi Adı: PHYSICS OF FLUIDS

Özet

The melting process of a solid phase change material sitting above a heater of rotating as well as permeable disk is revisited. The melting starts due to the temperature difference between the solid and the disk, and a melt layer of thin thickness is formed subject to a three dimensional motion. The motion is subject to the effects of pressure load (including the weight of the solid) directly acting on the solid and a centrifugal force created by the rotation. The amount of melt is then controlled by the action of wall permeability. The removal of melt is assumed to be steady, governed by the nonlinear similarity equations. Numerical simulations are performed to seize the behaviors of fluid and temperature fields of the melt. Moreover, the physical features of melting rate, heat transfer at the solid liquid interface and at the disk surface, and radial and tangential stresses are analyzed in detail. These physical properties are shown to be in excellent agreement with those determined from the thin melting film approximations. External load and suction are found to enhance the melting and heat transfer rates at sufficiently small melt film thicknesses. Published under license by AIP Publishing.