Abstract
A numerical analysis is presented for laminar free convection condensation of saturated vapors of water and carbon dioxide on a vertical flat surface in the reduced temperature range Ts, / Tc = 0.990−0.9998. The heat transfer coefficient can be correlated by the equation containing the correction for the convection and inertia terms in the case of constant physical properties, when the specific heat is evaluated using its average value over the surface temperature Tw to the saturation temperature Ts and the other physical properties are evaluated at the film temperature. The reduction of condensation mass flux or the heat flux at the vapor-liquid interface due to the convection term is expressed as the same function of the phase change number as the case of constant physical properties, when the specific heat is evaluated using Us average value over the temperature Tr = Tw + (2/3) (Ts−Tm)toTs.
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