Preconditioned upwind methods to solve 3-D incompressible Navier-Stokes equations for viscous flowsA computational method for calculating low-speed viscous flowfields is developed. The method uses the implicit upwind-relaxation finite-difference algorithm with a nonsingular eigensystem to solve the preconditioned, three-dimensional, incompressible Navier-Stokes equations in curvilinear coordinates. The technique of local time stepping is incorporated to accelerate the rate of convergence to a steady-state solution. An extensive study of optimizing the preconditioned system is carried out for two viscous flow problems. Computed results are compared with analytical solutions and experimental data.
Document ID
19900051591
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hsu, C.-H. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Chen, Y.-M. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Liu, C. H. (NASA Langley Research Center Hampton, VA, United States)