Why should the induction heating coil be made of a round copper tube?

In the induction heating furnace, the induction heating equipment’s inductor manufacturing process does not stipulate that round copper pipes must be used, but in many cases the round pipes are easy to process and the raw materials are relatively cheap. In fact, the flat square tube has a better effect, and the magnetic field lines are more dense and uniform. To be precise, it is more efficient to use a square copper tube as an induction coil. It is not recommended to use round copper tubes for induction heating coils.