| Journal: | Journal of the Brazilian Society of Mechanical Sciences |
| Database: | PERIÓDICA |
| System number: | 000312141 |
| ISSN: | 0100-7386 |
| Authors: | Riehl, R.R1 Ochterbeck, J.M2 Seleghim-Junior, P3 |
| Institutions: | 1Universidade Federal de Santa Catarina, Departamento de Engenharia Mecanica, Florianopolis, Santa Catarina. Brasil 2Clemson University, Mechanical Engineering Department, Clemson, Carolina del Sur. Estados Unidos de América 3Universidade de Sao Paulo, Departamento de Engenharia Mecanica, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2002 |
| Season: | Jul |
| Volumen: | 24 |
| Number: | 3 |
| Pages: | 186-193 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | In two-phase miniature and microchannel flows, the meniscus shape must be considered due to effects that are affected by condensation and/or evaporation and coupled with the transport phenomena in the thin film on the microchannel wall, when capillary forces drive the working fluid. This investigation presents an analytical model for microchannel condensers with a porous boundary, where capillary forces pump the fluid. Methanol was selected as the working fluid. Very low liquid Reynolds numbers were obtained (Re~6), but very high Nusselt numbers (Nu~150) could be found due to the channel size (1.5 mm) and the presence of the porous boundary. The meniscus calculation provided consistent results for the vapor interface temperature and pressure, as well as the meniscus curvature. The obtained results show that microchannel condensers with a porous boundary can be used for heat dissipation with reduced heat transfer area and very high heat dissipation capabilities |
| Disciplines: | Física y astronomía |
| Keyword: | Dinámica de fluidos, Termodinámica y física estadística, Microcanales, Control térmico, Capilaridad, Condensación, Meniscos |
| Keyword: | Physics and astronomy, Fluid dynamics, Thermodynamics and statistical physics, Microchannels, Thermal control, Capillarity, Condensation, Meniscus |
| Full text: | Texto completo (Ver HTML) |
