G204 加熱された水平円管内の発達した空気流のカオス的遷移(オーガナイズドセッション20 : 複雑性熱流体現象 : 熱流体のカオスとフラクタル)

概要

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I have experimentally studied the influence of the buoyancy force and inlet flow conditions on the laminar-turbulent transition process of fully developed air flow in a heated horizontal tube with uniform wall heat flux at modified Rayleigh number 3.1×10^6. Eight time-series of the air temperature were simultaneously obtained using eight thermocouples positioned within the tube along a vertical line passing through the tube's axis. I have studied the time and space dependence of the transition behavior by analyzing these instantaneous time-series. By calculating a set of Lyapunov exponents and the correlation dimension of the time-series of a single thermocouple, these transitional flows are found to be chaotic.
一般社団法人日本機械学会の論文
2001-11-03