Abstract
An experimental study through temperature measurements was conducted to investigate the thermal characteristics induced by the interaction between the thermal buoyancy and rotation-induced Coriolis force and centrifugal force in an air-filled heated inclined cylinder rotating about its axis. Results were obtained for the following ranges of the governing groups: thermal Rayleigh number Ra=2.3×10 6 and 4.6 × 10 6, Taylor number 0≤ Ta≤2.2×10 10, rotational Rayleigh number 0≤Ra Ω≤5.9×10 8 and inclined angle 0≤ Ψ≤90°. The experimental data suggested that when the cylinder is stationary, the thermal buoyancy driven flow is random oscillation at small amplitude after initial transient for inclined angle Ψ<60°. Rotating the cylinder was found to destabilize the temperature field when the rotation speed Ω is less than 30 rpm and to stabilize it when the Ω exceeds 30 rpm. Additionally, the distributions of time-average temperature θ av in the Z-direction for various inclined angles become widely separate only at low rotation rates, Ω<60 rpm.
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