The primary instability of the flow past rectangular cylinders is studied to comprehensively describe influence aspect ratio $AR$ and rounding leading- and/or trailing-edge corners. Aspect ratios ranging between $0.25$ $30$ are considered. We show that critical Reynolds number ( $\textit {Re}_c$ ) corresponding increases with ratio, starting from {Re}_c \approx 34.8$ for $AR=0.25$ a value 140$ ...

Abstract Optimal power flow (OPF) plays an important role in the secure and economical operation of distribution network. This paper proposes a novel generalized linear‐constrained optimal (GLOPF) model for both radial mesh networks, which iteratively approaches solution to original OPF problem. The first‐order Taylor series approximation method is applied linearize non‐linear non‐convex constr...