The virtual boundary method is extended to three-dimensional application and used to simulate the flow passing around two circular cylinders in cruciform arrangement at Re = 150, and the flow field of two spheres in tandem arrangement at Re = 250.

When it comes to the monospaced chamfer at intersection line of orthogonal cylinder and cylindrical bore,however,no mature manufacturing method has been found yet.

Discussing based on cutting method of conical cylinder with plane arc axes;