Convection in rotating flows with simultaneous imposition of radial and vertical temperature gradients
Abstract
Laboratory experiments were conducted to study heat transport characteristics in a nonhomogeneously heated fluid annulus subjected to rotation along the vertical axis (z). The nonhomogeneous heating was obtained by imposing radial and vertical temperature gradient ({\Delta}T). The parameter range for this study was Rayleigh number, Ra=2.43x10^8-3.66x10^8, and Taylor number, Ta=6.45x10^8-27x10^8. The working fluid was water with a Prandtl number, Pr=7. Heat transport was measured for varying rotation rates ({\Omega}) for fixed values of {\Delta}T. The Nusselt number, Nu, plotted as a function of Ta distinctly showed the effect of rotation on heat transport. In general, Nu was found to have a larger value for non-rotating convection. This could mean an interplay of columnar plumes and baroclinic wave in our system as also evident from temperature measurements. Laser based imaging at a single vertical plane also showed evidence of such flow structure.
Keywords
Cite
@article{arxiv.1611.00807,
title = {Convection in rotating flows with simultaneous imposition of radial and vertical temperature gradients},
author = {Ayan Kumar Banerjee and Siddhesh Tirodkar and Amitabh Bhattacharya and Sridhar Balasubramanian},
journal= {arXiv preprint arXiv:1611.00807},
year = {2016}
}
Comments
8 pages, 5 figures, 8th International Symposium on Stratified Flows, San Diego, August 2016