The Navier-Stokes equations of the vorticity-streamfunction form are solved numerically for the flow past a semicircular arc for Reynolds numbers in the range 0.1 < Re < 50. Two special cases are treated.: Firstly, the flow is in the direction normal to the chord and to the convex side of the are and, secondly, to the concave side.
The Joukowsky transformation together with the grid stretching is used to preserve the orthogonality and provide a finer grid resolution where it is needed. The vorticity and stream function equations are discretized by using the central differencing scheme and are solved by using the ADI and SOR methods respectively.
The eddy dimensions, strength, and the separation points are presented for the various Reynolds numbers. Comparisons of the present results with other available bluff body results are also made when they are appropriate.
