Parallel Computations of Incompressible Viscous Flow in a Lid-Driven Square211 Cavity and Program Performance on the NWT Computer System

摘要

This paper reports parallel computations of incompressible viscous flow in a lid-211u001edriven square cavity on the NWT computer system. In order to obtain numerical 211u001esolutions of this flow, consistent finite-difference approximations on non-211u001estaggered grids and four iterative solution methods are used. Computations are 211u001eperformed on the Reynolds number range of Re=0 to approximately 100,000, and 211u001eeffect of the Reynolds number, number of processing element (pe) in parallel 211u001eprocessing, solution method and grid size on the computational results are 211u001eexamined. Actual rates of the parallelized square cavity programs on the NWT 211u001ecomputer system are measured, and two characteristic parameters of these programs 211u001eare estimated for the cases that the actual rate is considered as a function of 211u001epe and that the actual rate is considered as a function of the grid size. 211u001eMeasurements of the maximum actual rate and estimations of the speedup and 211u001eefficiency against pe on the NWT computer system are indicated as well.