blockMeshDict Basics | [edges]

This is a basic tutorial on blockMeshDict. Two different options we will use in this tutorial to create curved edges. More options you can explore by yourself like, arc, polyline, Bspline curve, bezier curve, spline....
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[@User-Tal1951]

How to do a tube with this curved edge?

[@namanpherwani4733]

How to make holes in geometry to act as inlet?

[@DDFluids]

You can use multiblocks to define your geometry and then make a hole. For velocity inlet, you can use surface normal fixed value type boundary condition.