A Theoretical Study of Steady State and Transient Condensation on Axisymmetric Fins Under Combined Capillary and Gravitational Forces
| Autor: | Carlo Saverio Iorio, Margaritis Kostoglou, Andrey Glushchuk, Cosimo Buffone, Thodoris D. Karapantsios |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Paraboloid Work (thermodynamics) Steady state Fin Capillary action Applied Mathematics General Engineering Rotational symmetry General Physics and Astronomy 02 engineering and technology Mechanics 01 natural sciences 010305 fluids & plasmas 020303 mechanical engineering & transports Classical mechanics 0203 mechanical engineering Modeling and Simulation 0103 physical sciences Transient (oscillation) Reduction (mathematics) |
| Zdroj: | Microgravity Science and Technology. 28:559-567 |
| ISSN: | 1875-0494 0938-0108 |
| DOI: | 10.1007/s12217-016-9511-z |
| Popis: | The present work attempts to model the case of combined gravitational and capillary motion of condensate for an axisymmetric fin under steady and transient fin operation conditions. The focus here is to examine the structure of the mathematical problem and to develop suitable numerical techniques rather than yield information on the macroscopic condensate flow rate and fin efficiency. The problem is formulated starting from general conditions and is simplified step by step by introducing corresponding assumptions. The particular fin shape of a paraboloid from revolution is chosen and the equations are properly non-dimensionalized. A vast reduction of the number of problem parameters is achieved in this way. The cases of isothermal fin, steady state operation and dynamic operation are treated separately using specialized numerical solution techniques developed for each case in order to improve computational efficiency and accuracy. Typical results of fin temperature and condensate film thickness are presented and discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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