수치모사에 의한 원심식 분자 증류장치에서의 열 및 물질전달에 미치는 Prandtl 수의 영향

Abstract

The rigorous mathematical model of heat and mass transfer on the rotating surface in the centrifugal molecular distillation is developed. Tangential velocity component to the conical surface is independent of z-direction but not negligible. The solutions of fluid temperature profile and mass transfer rates of distillate are obtained using Finite Difference Method. The heat conduction from heating plate to film decreased as Prandtl number increased. These solutions show good agreement with the approximate solution for liquids near Pr≒10. However these solutions differ from the approximate solutions at Pr>100 as heating rate increases. The solutions in the limited case that the heating rate is equal to the latent heat of vaporization agree with those of Greenberg.