Flow of water in a channel with various obstruction geometries at the entry

<div>The flow characteristics of water (Newtonian fluid) in a test channel with various obstruction</div><div>geometries at the channel entry are investigated. The fluid motion in the test channel could be stagnant, forward or</div><div>reverse depending on the position of the obstruction geometries. The reverse flow phenomenon has attracted</div><div>attention of the authors due to its practical implication in the process industry. The reverse flow characteristics are</div><div>investigated in details at a fixed Reynolds number of 6000. The obstruction geometries used in the experiments</div><div>were circle, semicircle, triangle and flat plate. It was observed that the flat plate obstruction generated the</div><div>maximum reverse flow, while the triangle obstruction generated the least reverse flow. It was also observed that</div><div>the flat plate obstroction produced the least forward flow, while the circle obstruction produced the highest</div><div>forward flow. Flow visualisation photographs are presented and discussed here.</div>