A numerical study is performed to determine the effects of heating on laminar fluid flow through a square isothermal channel with radial rotation. Computations range from the channel entrance to a flow distance of 300 or 600 times the hydraulic diameter, depending upon the Reynolds number. Surface vorticity intensity is used to indicate the variation of the longitudinal vortex flow. Results reveal that heating has a significant effect on the vortex flow evolution and the change in the laminar heat transfer characters due to the centripetal buoyancy. The ranges of the Rossby number for induction of wavy vortex flow are also discussed.