Artificial Void Wave Propagation in a Gas-Liquid Two-Phase Horizontal Turbulent Channel Flow

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  • 水平気液二相チャネル乱流における人工ボイド波の伝ぱ
  • ミズ ヘイキエキ ニソウ チャネル ランリュウ ニ オケル ジンコウ ボイドハ ノ デンパ

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Abstract

<p>This study aims to reveal the development process of artificial void waves generated in a fully developed turbulent channel flow. Void waves generated with periodically fluctuated air flow rate were optically visualized by a high-speed video camera at three locations along the channel. The measured spatio-temporal fluctuations of void waves maintained the initial frequency given at the injection during the downstream propagation. The diffusion coefficients of void distributions were calculated to evaluate the influence of diffusion in a two-phase turbulent flow. The coefficients denoted that diffusion effect was larger than that of turbulent eddy viscosity on void wave deformation.</p>

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