Partial obstruction of flow through a channel

We study the disturbance on two-dimensional flow generated by a circular obstacle of radius r placed downwind in front of a duct of width w at a distance lambda between the center of the obstacle and the inlet position of the channel. Our results show that, at low Reynolds conditions, the flux phi at the duct exhibits distinct regimes for different lambda intervals. (C) 2017 Elsevier B.V. All rights reserved.