Computational study of three-dimensional flow past an oscillating cylinder: effects of oscillation mode on flow structure and forces

摘要

A numerical investigation of three-dimensional flow past an oscillatingcylinder at Re = 400 was carried out to investigate the effects ofoscillation mode on flow structure and forces. The cylinder is forced tooscillate with a frequency in the in-line direction twice that of thetransverse frequency, thus following a figure-eight trajectory. It isfound that the flow three-dimensionality and forces on the cylinderdepend strongly on the direction in which the figure eight is traversed.