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Experimental Study of the Influence of Small Upward Seepage on Open-Channel Flow Turbulence
AbstractMeasurements of turbulent open-channel flow subjected to upward seepage (injection) were performed in a rectangular laboratory flume using a two-dimensional electromagnetic velocimeter. The influence of vertical groundwater flow on open-channel hydrodynamics was analyzed. The output of these experiments demonstrates that the induced seepage affects the dynamics of turbulence in open-channel flow, even though the magnitude of the groundwater flow velocity is significantly smaller than the magnitude of the free surface water flow velocity. Upward seepage affects the instantaneous water flow velocity of the open channel and its turbulence characteristics. It is observable that upward seepage modifies the shape of the profiles of the time-averaged shear stresses and turbulent kinetic energy. In most cases, the studied open-channel flows do not follow the −5/3 law of isotropic turbulence.
Experimental Study of the Influence of Small Upward Seepage on Open-Channel Flow Turbulence
AbstractMeasurements of turbulent open-channel flow subjected to upward seepage (injection) were performed in a rectangular laboratory flume using a two-dimensional electromagnetic velocimeter. The influence of vertical groundwater flow on open-channel hydrodynamics was analyzed. The output of these experiments demonstrates that the induced seepage affects the dynamics of turbulence in open-channel flow, even though the magnitude of the groundwater flow velocity is significantly smaller than the magnitude of the free surface water flow velocity. Upward seepage affects the instantaneous water flow velocity of the open channel and its turbulence characteristics. It is observable that upward seepage modifies the shape of the profiles of the time-averaged shear stresses and turbulent kinetic energy. In most cases, the studied open-channel flows do not follow the −5/3 law of isotropic turbulence.
Experimental Study of the Influence of Small Upward Seepage on Open-Channel Flow Turbulence
Kostecki, Stanisław W (author) / Herrera-Granados, Oscar
2017
Article (Journal)
English
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