Cecere, Anselmo (2009) A study on self-rewetting fluids for heat transfer in microgravity. [Tesi di dottorato] (Inedito)
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | A study on self-rewetting fluids for heat transfer in microgravity |
| Autori: | Autore Email Cecere, Anselmo anselmocecere@hotmail.com |
| Data: | 30 Novembre 2009 |
| Numero di pagine: | 120 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Ingegneria aerospaziale |
| Scuola di dottorato: | Ingegneria industriale |
| Dottorato: | Ingegneria aerospaziale, navale e della qualità |
| Ciclo di dottorato: | 22 |
| Coordinatore del Corso di dottorato: | nome email Moccia, Antonio antonio.moccia@unina.it |
| Tutor: | nome email Savino, Raffaele rasavino@unina.it |
| Data: | 30 Novembre 2009 |
| Numero di pagine: | 120 |
| Parole chiave: | Heat Pipe, Marangoni Effect, Self-rewetting fluid, Microgravity Experiment, Interferometry |
| Settori scientifico-disciplinari del MIUR: | Area 09 - Ingegneria industriale e dell'informazione > ING-IND/06 - Fluidodinamica |
| Depositato il: | 20 Mag 2010 07:56 |
| Ultima modifica: | 30 Apr 2014 19:38 |
| URI: | http://www.fedoa.unina.it/id/eprint/3829 |
| DOI: | 10.6092/UNINA/FEDOA/3829 |
Abstract
In a number of water alcohols solutions the surface tension is an increasing function of temperature. Such mixtures are generally referred as self-rewetting fluids because convection driven by a reverse Marangoni effect is direct from cold to hot region along liquid-vapour interface. Within two phase heat transfer device, like heat pipes, liquid condensed is spontaneously driven to the hot evaporator improving the thermal performances and increasing the maximum heat flux. The research activities focused on numerical simulation and experimental laboratory for thermal characterization of heat pipe filled with self-rewetting fluids. Measurements of thermo-physical properties, in particular surface tension, have been carried out for several binary and ternary mixtures. A comparison between heat pipe filled ordinary and self-rewetting fluids has been carried out. Flow visualization of self-rewetting fluids has been obtained using optical diagnostic systems.
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