FLUID FLOW IN ROTATING HELICAL SQUARE DUCTS

A numerical study is made for a fully developed laminar flow in rotating helical pipes. Due to the rotation, the Coriolis force can also contribute to the secondary flow. The interaction between rotation, torsion, and curvature complicates the flow characteristics. The effects of rotation and torsion on the flow transitions are studied in details. The results show that there are obvious differences between the flow in rotating ducts and in helical ducts without rotation. Certainhitherto unknown flow patterns are found. The effects of rotation and torsion on the friction factor are also examined.Present results show the characteristics of the fluid flow in rotating helical square ducts.