The viscous flow field around a marine propeller operating in an open-water condition is simulated by solving the Reynolds-averaged Navier-Stokes (RANS) equations. The two-layer k-ε model is used to close the governing equations. An H-type grid topology is used to generate computational grids. The RANS equations are discretized by the finite-analytic method with a PISO-like algorithm in the nonstaggered grid layout. In order to accelerate the convergence of solutions with highly stretched grids, a local time-stepping technique is employed. At model Reynolds number, large area of a propeller blade is covered by laminar flow such that two different flow zones exist, at least, on the propeller blade. In the present paper, these flow zones are simulated by a triggering technique in which the transition line is determined from the experimental data. Results are in general agreement of experimental data.
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