I want to simulate a centrifugal pump,whose inlet is a cylinder pipe.I only need to simulate one channel,so the inlet should be a 60-degree-sector region (I have six blades),I do not know how to make grids in this region,because it only has three edges at one section,who can tell me?

thank you

use O-grid to make the grid in pipe region so that it will not create the wedges at the center.