Natural convection from a pair of horizontal cylinders at controlled heating

0475632 - ÚT 2018 BR eng C - Conference Paper (international conference)
Broučková, Zuzana - Trávníček, Zdeněk
Natural convection from a pair of horizontal cylinders at controlled heating.
9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics. Brazílie: Assembly of World Conferences on Experimental Heat Transfer, Fluid Mechanics and Thermodynamic, 2017 - (Barbosa Jr., J.; Ribatski, G.)
[World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics /9./. Iguazu Falls (BR), 11.06.2017-15.06.2017]
R&D Projects: GA ČR(CZ) GA16-16596S
Institutional support: RVO:61388998
Keywords : natural convection * heated circular cylinder * plume
Subject RIV: BJ - Thermodynamics

Natural convection from a pair of horizontal cylinders was experimentally investigated in water at continuous and pulsating heating regimes. Flow and thermal fields were investigated by PIV and LIF experiments. The pulsating heating was used at the subharmonic frequency of 0.25 Hz and the Rayleigh numbers were from 250 to 1800. For continuous heating, a pair of laminar plumes was generated. The heat transfer data correspond very well to the representative correlations. For pulsating heating, flow and thermal fields were effectively controlled and unsteady vortex structures were generated.

Permanent Link: http://hdl.handle.net/11104/0273577