Boundary layer visualization in turbulent Rayleigh-Bénard convection in air
In: 23rd International Congress of Theoretical and Applied Mechanics : August 19 - 24, 2012, Beijing, China, 2 Seiten
2012Konferenz-/Tagungsbeitrag
Technische Universität Ilmenau (1992-) » Fakultät für Maschinenbau (1992-) » Institut für Thermo- und Fluiddynamik (1992-) » Fachgebiet Thermo- und Magnetofluiddynamik (2005-2016) ↑
Titel:
Boundary layer visualization in turbulent Rayleigh-Bénard convection in air
Sonstige:
Du Puits, RonaldTU;Resagk, ChristianTU;Rilk, Johannes;Thess, AndréTU
Erscheinungsjahr:
2012
PPN:
730899365
Sprache des Textes:
Englisch
Erschienen in
23rd International Congress of Theoretical and Applied Mechanics : August 19 - 24, 2012, Beijing, China
in:
2 Seiten
PPN:
730897435
Schlagwort, Thema:
ilm <2012> ; Fachgebiet Thermo- und Magnetofluiddynamik <Ilmenau> ; Verfasser ; Kongressbeitrag ; referiert
Datenträgertyp:
Technischer Datenträger
Ressourcentyp:
Text
Peer Reviewed:
Ja
Teil der Statistik:
Ja
DESTATIS Fachsystematik:
6900 Maschinenbau allgemein

Abstract in Englisch:

We present results of boundary layer flow visualization in turbulent Rayleigh-Bénard (RB) convection in air at Rayleigh number of Ra=1.4 x 1010. The experiments have been performed in a slender rectangular test cell with the dimensions of 2.5 m x 2.5 m x 0.6 m. The cell was installed in our large-scale RB experiment 'Barrel of Ilmenau' using its uniformly tempered heating and cooling plates as bottom and top bound of the small cell. Highly resolved movies as well as single frames of the boundary layer flow have been captured at various positions above the heating plate. They show that the idea of a basically laminar boundary layer does not hold at low Prandtl and moderate Rayleigh numbers.