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THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer
September, 15-18, 2015, Sarajevo, Bosnia and Herzegovina

DOI: 10.1615/ICHMT.2015.THMT-15


ISBN Print: 978-1-56700-427-4

ISBN CD: 978-1-56700-428-8

Turbulence budgets in conf ned thermo-magnetic convection

pages 755-758
DOI: 10.1615/ICHMT.2015.THMT-15.1690
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ABSTRACT

We report on combined experimental and numerical studies of the thermo-magnetic convection of paramagnetic fluid inside a differentially heated cubical enclosure, subjected to combined effects of thermal buoyancy and magnetization forces. In contrast to the previously reported studies in literature, which observed solely laminar flow regimes, here we focus on the fully developed turbulent flow regimes. These flow regimes are obtained by using a combination of the state-of-art superconducting magnets (with a strength up to 10 T and magnetic field gradients up to 900 T2/m) and by comprehensive selection of suitable paramagnetic fluids. Detailed comparison between experiments (integral wall-heat transfer, temperature time-series at different locations within the enclosure) and direct numerical simulations (DNS) are performed and good agreements are obtained in predicting the integral heat transfer. In addition, analysis of the long-term averaged first- and second-moments of velocity and thermal fields is performed. Finally, budgets of the turbulent kinetic energy and of the temperature variance are analyzed.

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