5. Computation of High Reynolds Number Flows Past a Ship Hull Using the IAF Scheme

概要

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The full Navier-Stokes equations for the flow past a Wigley model was computed using the Implicit Approximate Factorization scheme, at the Reynolds number R_e=10^6. The Baldwin-Lomax eddy viscosity model, which is the two-layer algebraic model, was used for simulating the high Reynolds number flow. The present scheme showed good numerical stability property, and the computation took 5 hours on a large scalar machine. The wake distributions thus obtained showed reasonable agreement with the measurements. The strong pressure oscillation, which existed in the previous computation, has been reduced dramatically by modifying the boundary condition. Though slight wiggles persisted near A. P., the pressure distributions showed good agreement with the measurements. The shear stress distribution, which was obtained using the velocity distribution, showed rather poor agreement with the measurements.
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