| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Mech Engn, Heat Transfer Res Grp, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 38, n. 1, p. 209-225, JAN 2016. |
| Web of Science Citations: | 8 |
| Abstract | |
This paper presents a new void fraction predictive method for two-phase gas-liquid flows inside tubes for horizontal and vertical upward flows based on the principle of minimum kinetic energy. Non-uniformities of the velocity profiles are taken into account in the development of the method through empirical factors defined by the momentum coefficients ratio. A regression analysis to correlate the momentum coefficients ratio based on a broad databank gathered from the literature covering horizontal and vertical upward flows is performed. The proposed method has proven more accurate than the current methods available in the literature, as it predicts 92 and 85 % of the experimental data for horizontal and vertical saturated flows, respectively, within a +/- 10 % error band. The experimental database includes results for saturated flow and covers mass velocities ranging from 70 to 800 kg/m(2) s and from 37 to 4500 kg/m(2) s and tube internal diameters from 0.5 to 13.8 mm and 6 to 89 mm for horizontal and vertical upward flows, respectively. (AU) | |
| FAPESP's process: | 15/00854-5 - Characterization of external two-phase flow across tube bundles |
| Grantee: | Fabio Toshio Kanizawa |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| FAPESP's process: | 11/50176-2 - Mitigação da emissão de gases de efeito estufa em sistemas de refrigeração mediante a utilização de gases com baixo GWP e a aplicação de micro e nanotecnologias |
| Grantee: | Gherhardt Ribatski |
| Support Opportunities: | Research Program on Global Climate Change - Regular Grants |
| FAPESP's process: | 14/06902-9 - Theoretical and experimental study of flow induced vibration during external two-phase flow across tube bundle |
| Grantee: | Fabio Toshio Kanizawa |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 10/20670-2 - Theoretical and Experimental study of Void Fraction and Flow Pattern Induced Vibration on Tubes Bundle |
| Grantee: | Fabio Toshio Kanizawa |
| Support Opportunities: | Scholarships in Brazil - Doctorate |