An efficient fourth-order semicompact finite difference scheme has been developed to solve steady incompressible Navier-Stokes\n(N-S) equations in stream function and vorticity formulation in a triangular cavity of arbitrary geometry. The governing equations\nare transformed into curvilinear coordinates by a simple linear transformation to handle the nonregular geometry of the problem.\nThe main feature of the new higher-order semicompact scheme is that it can calculate a triangle flow with arbitrary shape for high\nReynolds numbers. It is found that the solutions obtained with the present scheme are in good agreement with the analytical results\nor with the existing results depending on the availability.
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