We reveal the effects of sweep on wake dynamics around NACA 0015 wings at high angles attack using direct numerical simulations and resolvent analysis. The influence is considered for from $0^\circ$ to $45^\circ$ $16^\circ$ $30^\circ$ a spanwise periodic wing chord-based Reynolds number $400$ Mach $0.1$ . Wing affects dynamics, especially in terms stability fluctuations with implications develo...

There are several results available in the literature dealing with efficient construction of t-spanners for a given set S of n points in Rd. t-spanners are Euclidean graphs in which distances between vertices in G are at most t times the Euclidean distances between them; in other words, distances in G are “stretched” by a factor of at most t. We consider the interesting dual problem: given a Eu...

We present an external memory algorithm to compute a well-separated pair decomposition (WSPD) of a given point set P in d in O sort N I/Os using O N B blocks of external memory, where N is the number of points in P, and sort N denotes the I/O complexity of sorting N items. (Throughout this paper we assume that the dimension d is fixed). We also show how to dynamically maintain the WSPD in O log...

Dumbbell trees were introduced in [1]. A detailed description of non-binary dumbbell trees appears in Chapter 11 of [3]. These notes show how binary dumbbell trees can be obtained, and how they can be used to construct, in O(n log n) time, a spanner of bounded degree and weight proportional to O(log n) times the weight of a minimum spanning tree. The reader is assumed to be familiar with the sp...