Flow with Re 0.5-couple thousand(experiment) Vortices develops at Re=30 Re increases and wake expands Re-130,wake reaches the particle size,begins oscillation Re-500,vortices begins to shed and convected to downstream Shedding frequency and Str Str =2fR/W Stable near-wake and a unstable,turbulent far-wake behind Re-1000,a flow around sphere and near-wake stable again,separates at 84 A=-6ewR+}• Flow with Re 0.5-couple thousand(experiment) – Vortices develops at Re=30 – Re increases and wake expands – Re-130, wake reaches the particle size , begins oscillation – Re-500, vortices begins to shed and convected to downstream • Shedding frequency and Str • Stable near-wake and a unstable, turbulent far-wake behind – Re-1000, a flow around sphere and near-wake stable again, separates at 84°