Laminar Film Condensation on Nonisothermal and Arbitrary-Heat-Flux Surfaces, and on Fins

1974 ◽  
Vol 96 (2) ◽  
pp. 197-203 ◽  
Author(s):  
J. H. Lienhard ◽  
V. K. Dhir
Keyword(s):  
Heat Flux ◽  
Wide Spectrum ◽  
Film Condensation ◽  
Two Dimensional ◽  
Boundary Layer Equations ◽  
Laminar Film ◽  
Laminar Film Condensation ◽  
Variable Wall ◽  
Similar Solutions ◽  
Axisymmetric Bodies

The class of two-dimensional laminar film condensation problems with variable wall-subcooling, for which the full boundary layer equations admit similar solutions, is identified. The solutions of this problem reveal the limitations of the simple Nusselt-Rohsenow method when it is employed to deal with nonisothermal wall problems. The Nusselt-Rohsenow method is used to treat a wide spectrum of variable wall termpeature problems, and results are compared with the exact solutions. Problems in which the heat flux is arbitrarily specified are considered. Variable wall termperature problems involving axisymmetric bodies and arbitrary variations of gravity are also included. Finally, condensation on fins of various configurations is also treated.

Similar Solutions for Laminar Film Condensation with Adverse Pressure Gradients

1973 ◽  
Vol 95 (2) ◽  
pp. 268-270 ◽  
Author(s):  
P. M. Beckett
Keyword(s):  
Numerical Solutions ◽  
Saturated Vapor ◽  
Film Condensation ◽  
Pressure Gradients ◽  
Two Dimensional ◽  
Laminar Film ◽  
Approximate Models ◽  
Laminar Film Condensation ◽  
Similar Solutions

Steady two-dimensional laminar film condensation is investigated when the saturated vapor has the Falkner–Skan mainstream. Numerical solutions and approximate models are discussed with reference to other published work.

Revisit of Laminar Film Condensation Boundary Layer Theory for Solution of Mixed Convection Condensation With or Without Noncondensables

2010 ◽  
Vol 132 (10) ◽  
Author(s):  
Y. Liao
Keyword(s):  
Boundary Layer ◽  
Mixed Convection ◽  
Forced Convection ◽  
Vapor Condensation ◽  
Boundary Layer Theory ◽  
Film Condensation ◽  
Two Phase ◽  
Boundary Layer Equations ◽  
Laminar Film ◽  
Laminar Film Condensation

This work presents a unique and unified formulation to solve the laminar film condensation two-phase boundary layer equations for the free, mixed, and forced convection regimes in the absence or presence of noncondensables. This solution explores the vast space of mixed convection across the four cornerstones of laminar film condensation boundary layer theory, two established by Koh for pure vapor condensation in the free or forced convection regimes and the other two established by Sparrow corresponding to condensation with noncondensables. This formulation solves the space of mixed convection completely with Koh and Sparrow’s solutions shown to be merely four specific cases of the current solution.

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