Pros/Drawbacks: This method won't enable for even flow into your bed thinking of the location on the 4 getting pipes close to the walls and the relatively of all domains. Take into account the following result to get a packed bed for alumina beads with a diameter of 6 mm. https://wedge-wire-screens32211.ttblogs.com/13522308/the-smart-trick-of-radial-flow-center-pipe-that-nobody-is-discussing