Forced flow laminar filmwise condensation of a pure saturated vapor in a vertical tube
Abstract
Equations and boundary conditions governing the condensation process have been examined in detail in order to determine relevant parameters of the problem. For a wide range of conditions, it is found that the condensation process is governed by five parameters. These are the ratio of vapor Froude to Reynolds number, buoyancy number, vapor to liquid viscosity ratio, liquid Prandtl number and subcooling number. The resulting set of partial differential equations of the boundary layer type is transformed to three first order ordinary differential equations by means of an integral analysis. The set describes the distribution of liquid film thickness, condensate mass flow rate and interphase mass transfer as a function of the distance along the tube. Solution of the reduced set of coupled, non-linear and stiff equations is accomplished by a computer code for wide range of arbitrary parameters.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1978
- Bibcode:
- 1978PhDT........58D
- Keywords:
-
- Circular Tubes;
- Film Condensation;
- Vapor Phases;
- Boundary Conditions;
- Boundary Layers;
- Heat Transfer;
- Hydrodynamics;
- Parameterization;
- Partial Differential Equations;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer