| Abstract: | Simultaneous heat and mass transfer at horizontal cylinders under free convection conditions have been investigated by an electrochemical method. Over all and local measurements of the mass transfer coefficient have been executed. The over all results can be represented by two empirical equations: $$\begin{gathered} Nu = 0,858 \cdot (Gr \cdot Pr)^{0,22} \hfill \\ Sh = 0,23 \cdot (Gr' \cdot Sc)^{1,07} + 1,49\sqrt {Sc/Pr} \cdot Gr \cdot Sc]^{0,28} \hfill \\ \end{gathered}$$ The ranges of the dimensionsless groups were as follows:Gr: 7,31 · 102 to 8,69 · 105 Gr′: 1,21 · 103 to 2,79 · 105 Pr: 10 to 7,56Sc: 3440 to 1890 |
