Massively Parallel Computing of Unsteady Incompressible Flows Using Coupled Method.
Kenjiro Shimano, Yoshiyuki Hamajima, Chuichi ARAKAWA · TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B · 2000
The situation called "fine granularity"is considered, which means that the number of control volumes or grid points allocated to one processor is small. Parallel efficiency usually deterirates in fine granularity, therefore it is crucial to develop a parallel Navier-Stokes solver of high efficiency. The authors have focused on the coupled method and applied it to steady flows on the Cartesian to show that its parallel efficiency was high. In this study, considering engineering applications, the coupled method is applied to unsteady flows and expanded to the boundary fitted coordinate. 2-D and 3-D unsteady flows past a body are calculated and high parallel efficiency of the coupled method is demonstrated.