Abstract
Three dimensional boundary layer disturbance growth in natural convection adjacent to a uniformly heated vertical plate has been studied using a finite volume direct numerical simulation (DNS). The sequence of events associated with the intermediate stage of the spatial laminar-turbulent-transition for water, with Prandtl number Pr = 6.7, for the Rayleigh numbers in the range Ra x ≈ 1 × 10 - 4 × 1013, with perturbation parameters closely matching the experiment reported in [1], is investigated. Preliminary calculations confirm that this stage is characterized by the development of spatially periodic inner and outer span-wise vortices (shear layers), which travel in a differing fashion and speed; and a secondary mean flow system. The important route to natural convection flow breakdown, the arising of a double vortex mean longitudinal system, repeatedly suggested by past experiments, seems to be related to the complex and opposing behavior of these two layers.
Original language | English |
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Title of host publication | 2010 14th International Heat Transfer Conference, IHTC 14 |
Editors | David Walsh |
Place of Publication | New York, NY |
Publisher | American Society of Mechanical Engineers (ASME) |
Pages | 173-181 |
Number of pages | 9 |
Volume | 7 |
ISBN (Electronic) | 9780791838792 |
ISBN (Print) | 9780791849422 |
DOIs | |
Publication status | Published - Aug 2010 |
Externally published | Yes |
Event | 2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States Duration: 8 Aug 2010 → 13 Aug 2010 |
Other
Other | 2010 14th International Heat Transfer Conference, IHTC 14 |
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Country/Territory | United States |
City | Washington, DC |
Period | 8/08/10 → 13/08/10 |