A Fully Coupled Newton-krylov Solver for Turbulent Aerodynamic Flows
نویسندگان
چکیده
A fast Newton-Krylov algorithm is presented for solving the compressible Navier-Stokes equations on structured multi-block grids with application to turbulent aerodynamic flows. The oneequation Spalart-Allmaras model is used to provide the turbulent viscosity. The optimization of the algorithm is discussed. ILU(4) is suggested for a preconditioner, operating on a modified Jacobian matrix. An efficient startup method to bring the system into the region of convergence of Newton’s method is given. Three test cases are used to demonstrate convergence rates. Singleelement cases are solved in less than 100 seconds on an engineering workstation, while the solution of a multi-element case can be found in less than 25 minutes.
منابع مشابه
A Fully Coupled Newton-krylov Solver for Turbulent Aerodynamics Flows
A fast Newton-Krylov algorithm is presented for solving the compressible Navier-Stokes equations on structured multi-block grids with application to turbulent aerodynamic flows. The oneequation Spalart-Allmaras model is used to provide the turbulent viscosity. The optimization of the algorithm is discussed. ILU(4) is suggested for a preconditioner, operating on a modified Jacobian matrix. An ef...
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