how to change this lid driven cavity code into SIMPLE pipeflow

so i have been working with this SIMPLE lid driven cavity code and i unable to change it into SIMPLE pipeflow. as you can see the lid driven cavity has west east and south as wall while north is open with x velocity = 1. i am trying to make the condition of north and south to be the wall and west and east to have x velocity = 1.

i have tried to change the initial condition of the x and y velocity. i have tried tweaking the velocity component calculation. i still am unable to produce SIMPLE pipeflow. as you can see in the figure it still producing lid driven cavity condition.