Accurate Multiblock Navier-Stokes Solver for Complex Aerodynamic Configurations

A computational-fluid-dynamics tool capable to simulate accurately viscous flows around complex aerodynamic configurations is described. The method combines a multiblock technique with a low-dissipation numerical method incorporated into a multigrid framework. Structured subdomains (blocks) are united in multigrid/multiblock structures, and the blocks are treated independently at each stage of the numerical procedure, maintaining a regular information exchange between the neighboring blocks. In the numerical procedure the convection part of the equations is approximated by a low-order upwind-biased scheme employed for multigrid relaxation in combination with a higher-order essentially nonoscillatory scheme used to supply a defect to the right-hand side of the discrete equations on the finest multigrid level in a way ensuring the overall high accuracy of the scheme. Computational examples demonstrate the ability of the resulting method to perform accurate large-scale computations of complex three-dimensional turbulent flows around realistic aerodynamic configurations