DNS of convective heat transfer in a rotating cylinder


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Kunnen, R.P.J. and Geurts, B.J. and Clercx, H.J.H. (2010) DNS of convective heat transfer in a rotating cylinder. In: Seventh International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, 8-10 September 2008, Trieste, Italy.

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Abstract:The effects of rotation on the convective heat transfer and flow structuring in a cylindrical volume of fluid is investigated with direct numerical simulation (DNS). A formulation of the discrete equations of motion in cylindrical coordinates is solved with finite-difference approximations. At constant Rayleigh (Ra; dimensionless temperature gradient) and Prandtl (Ro, the ratio of buoyancy and Coriolis forces, is varied between runs with 0.045 Ro ............
For Ro 1.2 we find the so~called large-scale circulation. At Ro 1.2 slender columnar vortical plumes are found. In a range of Ro heat transfer is increased by Ekman pumping in the vortical plumes.
plumes.
Item Type:Conference or Workshop Item
Copyright:© 2010 Springer
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/75957
Official URL:http://dx.doi.org/10.1007/978-90-481-3652-0_56
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