Numerical Analysis of Two-Phase Convection around a Cylinder in a Bubbly Flow.

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  • 気泡流中における円柱まわりの二相対流の数値解析
  • キホウリュウ チュウ ニ オケル エンチュウマワリ ノ 2ソウ タイリュウ ノ スウチ カイセキ

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Abstract

An experiment showed a quite strong effect of inserting a circular cylinder into a unform rising bubbly flow. Size of the dffected zone was more than several times as that of the cylinder. The purpose of present study is to elucidate the mecahnism of generating the two-phase convection using a numerical analysis based on Elulerian-Lagrangian model by which the bubble's bpundary condition on the cylinder can be treated accurately. The numerical results showed a good agreement with the experimental results and revealed the dependency of the flow on the void fraction bubble radius, blockage ratio as well as the bubble's bouncing condition on the cylinder surface.

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