Experimental Study on The Turbulent Mixing between Main Channel and Flood Plain Flows

Abstract

In a compound open channel the flow velocity on the flood plain and in the main channel shows a marked differece, and a mixing zone exists between these two flows. The objectives of this paper is to study the fluid mixing in this region and compare the mixing with that in the 2-D mixing layer by using the flow visualization results on the water surface and in a transverse cross section of the flow. The analogy between the fluid mixing in a compound open channel and that in the 2-D mixing layer has been demonstrated from the results.