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| dc.contributor.author | Carvalho, R.D.M.
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| dc.contributor.author | Venturini, O.J.
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| dc.contributor.author | Neves-Jr, F.
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| dc.contributor.author | Arruda, L.V.R.
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| dc.contributor.author | França, F.A.
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| dc.date.accessioned | 2014-07-18T09:01:05Z | |
| dc.date.available | 2014-07-18T09:01:05Z | |
| dc.date.issued | 2007 | |
| dc.description.abstract | Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007. | en_US |
| dc.description.abstract | In the oil industry there is a need to determine the dispersed phase holdup in multiphase flows using noninvasive, fast responding techniques; ultrasonic techniques apparently can fulfill these requirements. In this regard, the proposed paper analyzes the ultrasonic signals obtained through vertical, upward air-water flows in the zero to 14% void fraction range. Initially, the experimental apparatus and the flow patterns observed are discussed. Next follows a discussion of the ultrasonic signals characteristics and the trends in the transit time and attenuation. A new transit time definition is proposed that could be used for the characterization of two-phase flows. | en_US |
| dc.description.librarian | cs2014 | en_US |
| dc.format.extent | 6 pages | en_US |
| dc.format.medium | en_US | |
| dc.identifier.citation | Carvalho, RDM, Venturini, OJ, Neves-Jr, F, Arruda, LVR & França, FA 2007, 'Experimental study of ultrasonic characteristics in air-water bubbly flows', Paper presented to the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July 2007. | en_US |
| dc.identifier.isbn | 9781868546435 | |
| dc.identifier.uri | http://hdl.handle.net/2263/40877 | |
| dc.language.iso | en | en_US |
| dc.publisher | International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics | en_US |
| dc.relation.ispartof | HEFAT 2007 | |
| dc.rights | University of Pretoria | en_US |
| dc.rights.uri | University of Pretoria | en_US |
| dc.subject | Ultrasonic techniques | en_US |
| dc.subject | Ultrasonic signals characteristics | en_US |
| dc.subject | Characterization of two-phase flows | en_US |
| dc.subject | Multiphase flows | en_US |
| dc.subject | Transit time | en_US |
| dc.title | Experimental study of ultrasonic characteristics in air-water bubbly flows | en_US |
| dc.type | Presentation | en_US |
