Luis P. Bernal

TL;DR: In this paper, it is shown that superimposed on the primary, spanwise vortex structure there is a secondary, steam wise vortex structure, and the spatial organization of the secondary structure produces a well-defined spanwise entrainment pattern in which fluid from each stream is preferentially entrained at different spanwise locations.

TL;DR: In this article, a combined experimental (based on flow visualization, direct force measurement and phaseaveraged 2D particle image velocimetry in a water tunnel), computational (2D Reynolds-averaged Navier-Stokes) and theoretical (Theodorsen's formula) approach was used to study the fluid physics of rigid-airfoil pitch-plunge in nominally two-dimensional conditions.

TL;DR: In this paper, the effects of varying frequency and plunge amplitude for the same effective angle-of-attack time history are considered, and it is shown that for constant effective angle of attack, flow evolution is independent of Strouhal number, and as the reduced frequency is increased the leading edge vortex separates later in phase during the downstroke.

TL;DR: An overview of the challenges and issues facing micro air vehicles, along with sample results illustrating some of the efforts made from a computational modeling angle are offered.

TL;DR: A three-dimensional model of the plane mixing layer is constructed by applying digital image processing and computer graphic techniques to laser fluorescent motion pictures of its transversal sections.