Moderately and Widely Spaced Circular Cylinders in Crossflow and a Universal Wake Number

Abstract

The universal wake number concept was examined for the flow around two circular cylinders of equal diameter arranged in moderately and widely spaced staggered configurations. The experiments were conducted in the subcritical Reynolds number regime for P∕D=1.5–4.0. The results establish new limits for the validity of the universal wake number concept for moderately and widely spaced staggered cylinders in crossflow, and extend the results of an earlier study that focused only on closely spaced staggered cylinders.