This paper gives similarity transformations for laminar film condensation on
a vertical flat plate with variable temperature distribution and finds
analytical solutions for arbitrary Prandtl numbers and condensation rates. The
work contrasts with Sparrow and Gregg's assertion that wall temperature
variation does not permit similarity solutions. To resolve the long debatable
issue regarding heat transfer of non-isothermal case, some useful formulas are
obtained, including significant correlations for varying Prandtl numbers.
Results are compared with the available experimental data