Parallel Newton-Krylov method for rotary-wing flowfield calculations
Parallel Newton-Krylov method for rotary-wing flowfield calculations
- New search for: Wissink, A.M.
- New search for: Lyrintzis, A.S.
- New search for: Chronopoulos, A.T.
- New search for: Wissink, A.M.
- New search for: Lyrintzis, A.S.
- New search for: Chronopoulos, A.T.
The use of Krylov subspace iterative methods for the implicit solution of rotary-wing flowfields on parallel computers is explored. A Newton-Krylov scheme is proposed that couples conjugate-gradient-like iterative methods within the baseline structured-grid Euler/Navier-Stokes flow solver transsonic unsteady rotor Navier-Stokes. Two Krylov methods are studied, generalized minimum residual end orthogonal s-step orthomin. Preconditioning is performed with a parallelized form of the lower-upper symmetric Gauss-Seidel operator. The scheme is implemented on the IBM SPZ multiprocessor and applied to three-dimensional computations of a rotor in forward flight. The Newton-Krylov scheme is found to be more robust and to attain a higher level of time accuracy in implicit time stepping, increasing the allowable time step. The method yields approximately a 20 % reduction in solution time with the same level of accuracy in time-accurate calculations but requires more memory than do more traditional implicit techniques.
Document information
Parallel Newton-Krylov method for rotary-wing flowfield calculations
Paralleler Newton-Krylov-Algorithmus zur Berechnung des Strömungsfeldes eines Drehflügels
AIAA Journal ; 37 , 10 ; 1213-1221
1999
9 Seiten, 8 Bilder, 3 Tabellen, 33 Quellen
Article (Journal)
English
Similar titles
FLUID DYNAMICS - Parallel Newton-Krylov Method for Rotary-Wing Flowfield Calculations
| Online Contents | 1999