Numerical computations of flow in rotating ducts with strong curvature

The artificial compressibility method is used to analyze internal flows in rotating ducts having strong curvature. This study was concerned with the l aminar flow of an incompressible Newtonian fluid having constant viscosity in circular and square ducts with a 90 degrees bend The emphasis of the pre sent simulation is to determine the effect of rotation and through-flow rat e on the fluid Physics and friction characteristics in the straight channel and in the curved geometric regions The Reynolds numbers ranged from 100 t o 790 and the Rossby numbers from 0 to 0.4. Coriolis forces arising from ro tation Produce a non-symmetric secondary flow in the bend that increases th e loss coefficient as compared with the values for non-rotation. rn additio n, the wall friction losses in the straight outlet section are increased, a nd both effects are directly proportional to the Rossby number.