Numerical study of 3D nonlinear disturbance growth in transitional natural convection

Tilek Aberra, Steven W. Armfield, Masud Behnia, Shigenao Maruyama, Atsuki Komiya

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトル2010 14th International Heat Transfer Conference, IHTC 14
ページ173-181
ページ数9
DOI
出版ステータスPublished - 2010 12 1
イベント2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States
継続期間: 2010 8 82010 8 13

出版物シリーズ

名前2010 14th International Heat Transfer Conference, IHTC 14
7

Other

Other2010 14th International Heat Transfer Conference, IHTC 14
CountryUnited States
CityWashington, DC
Period10/8/810/8/13

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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