Technical Report of National Aerospace Laboratory. Comparison of Effectiveness of211 Four Open Boundary Conditions for Incompressible Unbounded Flows

摘要

Four open boundary conditions for incompressible unbounded flows are evaluated in211u001ethe framework of the Leith type third-order upwind scheme (QUICKEST scheme), and 211u001ethe effectiveness of each is compared by two means: the difference of flows among 211u001eopen boundary conditions, and between short and long open boundaries. Three test 211u001eproblems used for the open boundary condition evaluation are the backward-facing 211u001estep flow, the blunt based body flow and the rectangular cylinder obstacle flow 211u001ein a channel.