永久磁石によるパイプ壁面摩擦のコントロール

抄録

In our previous study, we confirmed the magnetic field of permanent magnet on the steel pipe could reduce the drag friction on the laminar flow of air in the pipe. Then, we focused that the magnetic field distribution affected the drag friction on the pipe wall. We prepared the ring type and cuboid type of magnets and compared the drag friction. As the results, the ring type magnets increased the drag friction, however, the cuboid type magnets reduce that. The estimated forces derived from the calculation of magnetic field distribution could explain the phenomena. We concluded that the magnetic field could control the drag friction of air flow in pipe flow.