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Session: Wall-bounded flows 5
Session starts: Thursday 27 August, 15:00
Presentation starts: 15:00
Room: Room B

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Robert Kaiser (Technische Universität Ilmenau)
Ronald du Puits (Technische Universität Ilmenau)

Abstract:
Local heat flux measurements at the heating plate of a cubic Rayleigh-Bénard cell show that the scaling exponent a in the Nu~Ra^a scaling law depends on the position at the plate surface. Using infrared thermography, the two-dimensional local wall heat flux is studied with a high spatial resolution. The results have been obtained in a small aspect ratio cell with Gamma_x=1, Gamma_y=0.26 and clearly show an effect of the sidewalls on the local and therefore also on the global scaling of the heat transport.