Abstract

The effects of the convection term and the inertia term on the Nusselt number in laminar-free convection condensation of pure saturated vapors are separately discussed. Based on the results, the following equation is proposed : [numerical formula] where Nuo denotes Nusselt's equation. The above equation contains a few errors due to the ρμ ratio. When we use integrally averaged values over the wall temperature, vapor temperature for C^-pl. and values at the film temperature for all other physical properties in the above equation, it correlates well the previous numerical results on the Nusselt number for water and carbon dioxide near the critical regions.

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