有限要素法による回転軸を共有する2円板間の流れの数値解析

概要

論文の詳細を見る
The unsteady flow fields in a narrow-gap flow between two corotating circular disks are investigated numerically by solving the time-dependent Navier-Stokes equations through the SMAC-FEM (simplified marker and cell finite-element method). In each triangular torus element, quadratic velocity elements and a linear pressure element are used. The conclusions are as follows. (1) When disks suddenly start rotating, they induce a secondary flow in the gap flow. As the primary swirling flow pattern develops into a nearly solid rotation, the secondary flow grows and then becomes very weak. (2) Since the viscous force is weaker in the gap flow with larger Reynolds number, the secondary flow is stronger in the early period. (3) The torque coefficients on both sides of a rotating disk decrease rapidly and then become constant. These constants are much smaller than that for a rotating disk in a stationary housing.
1993-11-25