Determining the two-phase friction coefficient in the transition between annular and fog flow |
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| Affiliation: | 1. University College Cork, Cork, Ireland;2. Teagasc Moorepark Food Research Centre, Fermoy, Ireland;1. UMR-3495 MAP-ARIA laboratory (Models and Simulations for Architecture, Urbanism and Landscape Applications and Research in Computer Science for Architecture) of the CNRS (research unit of the French National Center for Scientific Research), National Architecture School of Lyon (ENSAL), France;2. LCR – LafargeHolcim, France;3. IRHS, Agrocampus-Ouest, INRA, Université d''Angers, SFR 4207 QuaSaV, Beaucouzé, France;4. UMR-3495 MAP-ARIA laboratory, ÉNSA, Lyon, France |
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| Abstract: | The dependence of the transition conditions between annular and fog flow on the parameters of a system with boiling flow are analysed in order to extend the applicability of a physical model of the two-phase flow recently proposed by the authors to calculate the friction coefficient. Having suitably represented the phenomenon, examination is made as to its influence on the analytical development of the model, the results obtainable from the latter being compared with those of the relations usually employed and with experimental indications, thus showing the broad field of validity of the formulae presented. |
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