Abstract
In the present study, we investigate a self-excited oscillatory phenomenon of a two-dimensional confined jet with a rectangular-cross-section cylinder as a downstream target. More specifically, we conduct experiments and numerical simulation. In computations, the numerical method adopted here is a finite difference method (FDM) formulated in terms of vorticity and stream function. The governing equations consist of a vorticity-transport equation and a Poisson equation of stream function. To specify the value of stream function on the target surface, the condition of single-valuedness of pressure are applied. As a result, we confirm a good agreement between experiments and computations, which suggest that the concerning phenomenon is intrinsically two-dimenssional.
