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Title: Time-varying underflow into a continuous stratification with bottom slope Authored by: Fernandez, R.L. and Imberger, J. Abstract:
Results are presented from a laboratory investigation of a constant discharge gravity current moving down an inclined plane into a linearly stratified fluid; the density of the inflow decreased linearly with time, initially larger and finally smaller than the surface ambient density. The inflowing water was observed to follow three distinct flow regimes. First, during the time when the inflow was denser than the water in the stratified reservoir an underflow was observed to descend down the sloping bottom similar to a buoyancy-conserving regime. Then, as the density at the source continued to reduce with time, the front of the underflow decelerated and its body collapsed into an intrusion that traveled as a horizontal gravity intrusion. The initial buoyancy flux determined the point of collapse within the underflow. Finally, multiple intrusions were established successively at different depths in between the initial underflow and the surface buoyant plume.
Reference: Fernandez, R.L. and Imberger, J., 2008, Time-varying underflow into a continuous stratification with bottom slope, 134(9):1191-1198 Keywords: ELCOM |
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