Dune上の非定常空気乱流に関する実験的研究
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概要
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Unsteady flows were generated over smooth and rough, wavy beds in a wind tunnel with the section of 80cm×80cm and length of 820cm. Seven waves were placed in the tunnel and the measurement was carried out over the sixth bed. Longitudinal and vertical velocity components were measured with a X-type hot-wire anemometer at 9 sections over the wavy beds. For all the sections, the velocities were taken from the bed surface to the top of the tunnel. At each point, the measurements were repeated 5 times. The large volume of data obtained are used to calculate the ensemble-mean velocities as well as the Reynolds stresses.
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