Visualization of mixed convection flows in vertical, horizontal, and inclined pipes

dc.contributor.authorLagana, Antonino
dc.contributor.authorBaliga, Bantwal R. (Rabi)
dc.date.accessioned2015-04-24T09:38:50Z
dc.date.available2015-04-24T09:38:50Z
dc.date.issued2012
dc.description.abstractPaper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.description.abstractAn experimental apparatus for visualization of laminar mixed convection flows in vertical, horizontal, and inclined pipes is described. Two key elements of its design allowed, for the first time, flow visualization over the entire heated portion of the test section: a thin, electrically conductive, gold-film heater, suitably attached to the outside surface of a Plexiglas pipe, and about 80% transparent to light; and enclosure of this pipe within a larger concentric Plexiglas tube, and evacuation of the air in the annular space to achieve an essentially transparent and excellent insulation of the heated portion of the inner pipe. A dye injection technique was used to visualize the mixed-convection flow patterns. The flow-visualization photographs revealed the following: (i) a steady recirculating flow pattern which was followed by laminar flow instability in the vertical tubes; and (ii) dual, essentially symmetric, and steady spiralling flow patterns in the inclined and horizontal tubes. Some of these results were qualitatively similar to earlier numerical predictions in the published literature. The results are presented and discussed in this paper.en_ZA
dc.description.librariandc2014en_ZA
dc.format.extent8 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationLagana, A & Baliga, BR 2012, Visualization of mixed convection flows in vertical, horizontal, and inclined pipes, Paper presented to the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.identifier.isbn9781868549863
dc.identifier.urihttp://hdl.handle.net/2263/44804
dc.language.isoenen_ZA
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.relation.ispartofHEFAT 2012en_US
dc.rightsUniversity of Pretoriaen_ZA
dc.subjectLaminar mixed convection flowsen_ZA
dc.subjectFlow visualizationen_ZA
dc.subjectElectrically conductiveen_ZA
dc.subjectGold-film heateren_ZA
dc.subjectPlexiglas pipeen_ZA
dc.subjectPlexiglas tubeen_ZA
dc.subjectDye injection techniqueen_ZA
dc.subjectRecirculating flow patternen_ZA
dc.subjectLaminar flow instabilityen_ZA
dc.titleVisualization of mixed convection flows in vertical, horizontal, and inclined pipesen_ZA
dc.typePresentationen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Lagana_Visualization_2014.pdf
Size:
3.27 MB
Format:
Adobe Portable Document Format
Description:
Presentation

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: