AM05-10-001 側壁を加熱した矩形曲がり管流中の対流熱伝達(対流1,一般講演)

概要

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Flow with convective heat transfer through a curved rectangular duct of aspect ratio 2 is numerically studied by use of the spectral method with a temperature difference between the vertical sidewalls for the Grashof numbers ranging from 100 to 2000 over the Dean number 0≤Dn≤1000. First, steady solutions are obtained by the Newton-Raphson iteration method and then linear stability of the steady solutions is investigated. Time evolution calculations show that the laminar flow turns into chaos through various flow instabilities. Nusselt numbers are calculated as an index of the horizontal heat transfer. It is found that the convection due to the secondary flow, enhanced by the centrifugal force, increases heat transfer from the walls to the fluid. If the flow becomes periodic and then chaotic, as the Dean number increases, the rate of heat transfer increases remarkably with respect to a straight channel.
日本流体力学会の論文
2005-09-05