Numerical modeling of the unsteady flow of a viscous fluid in rotating channels

A finite-difference technique was proposed for calculating the unsteady laminar motion of a viscous compressible fluid in plane channels with arbitrary curvilinear boundaries. The technique is used to study motion in a channel with a rotating section. The approach uses a coordinate system in which the boundaries of the test channel coincide with the coordinate axes. Numerical modeling of liquid flow in channels with different angles of rotation showed that a decrease in the angle of flow rotation is accompanied by an increase in the Reynolds number at which closed circulation regions are formed on the walls.