Reply To: Poiseuille 3D Geometry Creation Query
w.r.t. the question on inflow / outflow indicators:
The reason why this is set up in this way is to ensure that the first resp. last x-axis orthogonal cell layer is setup as in- resp. outflow. For this we need to in some sense match up physical parameters with discretized (cell) locations (if we want to use indicators as is done in this example).
w.r.t. the extended domain:
This is needed to ensure that the discretized domain fits the whole pipe.