횡방향으로 정렬된 2개의 정사각주 후류에서의 3차원 불안정성

초록

Three-dimensional linear instability in the flow past two square cylinders in side-by-side arrangements are numerically studied by using a Floquet analysis. The distance between the neighboring faces of the two cylinders (G) is the key parameter which affects the secondary instability under consideration. In this paper, we plan to present the critical Reynolds number for the three-dimensional instability and the corresponding spanwise wave number of the most unstable (or least stable) wave for each G. Our results would shed light on a complete understanding of the onset of three-dimensional instability in the presence of two side-by-side square cylinders.