주유동방향으로 정렬된 정사각주 후류에서의 2차 불안정성

초록

Secondary instability in the flow past two square cylinders in tandem arrangements is 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 present the critical Reynolds number for the secondary 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 secondary instability in the presence of two tandem square cylinders.