Speed of computer code solving three-dimensional Navier-Stokes equations of flow of incompressible fluid by fractional-step method increased significantly by use of multigrid procedures. In method, equations solved on general nonorthogonal curvilinear coordinate grid, using volume fluxes. At each time step, computations performed in two fractional steps. In first step, equations of conservation of momentum solved by use of gradient of pressure from previous time step via explicit approximate-factorization method, yielding approximate flow field that does not satisfy equation of conservation of mass. In second step, discrete Poisson-like equation with Neumann-type boundary conditions, formed by combining equations of conservation of momentum and mass, solved iteratively.
Multigrid, Fractional-Step Computation Of Flow
NASA Tech Briefs ; 20 , 3
01.03.1996
Sonstige
Keine Angabe
Englisch
Multigrid, Fractional-Step Computation of Flow
Online Contents | 1996
Fractional-Step, Finite-Volume Computation Of Flow
NTRS | 1992
|Multigrid Computation of Rotationally Invariant Non-Linear Optical Flow
British Library Conference Proceedings | 2005
|Multigrid Acceleration of a Fractional-Step Solver in Generalized Curvilinear Coordinate Systems
Online Contents | 1993
|