RELAMINARIZATION MECHANISM IN ACCELERATED OPEN-CHANNEL

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  • 加速開水路流の再層流化メカニズムに関する基礎的研究

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<p> This study reproduced an accerelted open-channel flow with contaminat section in a laboratory flume, and focused on a relaminarization phenomenon. Reductions of normalized Reynolds stress and turbulence intensity were recognized by turbulence measurement. Further, we considered a physical mechanism related to a turbulence energy production. It was found that a turbulence production term expressed by acceleration of mean streamwise velocity becomes negative through the acceleration section. This phenomenon could be explained considering the turbulence energy budget of generation and dissipation.</p>

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