RELATION BETWEEN THE JUMP LENGTH AND THE ENERGY DISSIPATION IN A HORIZONTAL RECTANGULAR CHANNEL

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  • 長方形断面水平水路の跳水の長さとエネルギー損失との関係

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<p>For a free jump in a horizontal rectangular channel, the relation between the jump length and the energy dissipation is explained with the physical meaning by using an energy equation applied to the jump zone. In the jumps below a sluice gate, the distributions of the velocity and those of the turbulence intensity are obtained experimentally for the undeveloped and fully developed inflow conditions under a given inflow Froude number and Reynolds number. The convection of the turbulent energy and the work performed by the Reynolds stresses can be calculated, showing that the jump length is interpreted as the length of the zone within which the energy dissipation is accomplished.</p>

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