An Efficient Multiblock Navier-Stokes Flows Solver

An efficient flow solver based on structured multiblock grid is presented, and the solution of compressible thin-layer Navier-Stokes equations in a generalized time-dependent curvilinear coordinate system is accelerated with multigrid technique. The solver utilizes the technique of dynamic memory space management to optimize the limited memory space for a single computer, and only one executable file is needed to run different flow simulations with different size of grid points and various grid topologies which only need an input file which specifies the correct boundary conditions and necessary control information for a flow computation. The Navier-Stokes flow around a two element airfoil called GA (W)-1 with 30% fowler flap was calculated to validate the efficiency of the solver with multigrid accelerating technique. Computational results are also presented for the transonic flows over NASA CRM (Common Research Model) wing-body-tail configurations from the 4th AIAA CFD Drag Prediction Workshop to demonstrate the accuracy and reliability of the solver. Excellent agreement with experiment data shows that our flow solver is feasible. Both test cases in this paper used the same executable file created by present solver.