This study is concerned with numerical investigation of the entry section of the flow in a square-sectioned curved duct. The incompressible laminar viscous flow is developing from a uniform inlet velocity profile at the entrance and is assumed to have no separation. The governing Navier-Stokes equations are partially parabolized to facilitate spatial marching in stream direction in solving them numerically.
The calculated results are compared with the experimental ones for the particular case of square-sectioned straight duct and the agreement is good. For the curved square duct various results are obtained and it is shown that the flow development is qualitatively similar to that in the curved circular duct.
