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A finite-volume numerical calculation method for the solution of two-dimensional incompressible steady Navier-Stokes equation in general curvilinear coordinate system is presented.The main solution algorithm of the method is an extension of SIMPLE algorithm t o present general curvilinear coordinate formulation, maintaining the Cartesian velocities as dependent variable. The standard k-€ turbulence model i s used for closure of the Reynolds equation. Tliis method is applied to calculation of turhulent flows in a two-dimensional planar dump diffuser with uniform and distorted inlet velocity Profile, and the results are compared with the data obtained from experiments carried out in this study. The general flow pattern and velocity distribut.ion are success full^ predicted and the results show good agreement with experimental data, especiall~ using the QUICKER scheme for finite-difference approximation. Pressure loss can also be predicted using fine grid. but improvement must be achieved in the computational method to be able to predict pressure loss with moderate grid.The treatment of the pressure correction equation employed in this work enforces stahility and robustness of the computational method.

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