Experimental Study of the Influence of Small Upward Seepage on Open-Channel Flow Turbulence
Publication: Journal of Hydraulic Engineering
Volume 143, Issue 8
Abstract
Measurements 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 law of isotropic turbulence.
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Published In
Journal of Hydraulic Engineering
Volume 143 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 16, 2016
Accepted: Dec 14, 2016
Published online: Mar 23, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 23, 2017
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