We describe methods to measure the following properties of grey level corners: subtended angle, orientation, contrast, bluntness (or rounding of the apex), and boundary curvature (for cusps). Unlike most of the published methods for extracting these properties these methods are relatively simple, efficient and robust. They rely on the corner being pre-detected by a standard operator, thus makin...

Among the several noise-generation mechanisms of airfoil self-noise, trailing-edge bluntness noise is an important source, which caused by vortex shedding at blunt trailing edges. A numerical study on control using bio-inspired wavy leading edges presented in this paper. The high-fidelity, improved, delayed, detached eddy simulation (IDDES) method was used to calculate flow field, and acoustic ...

The optical properties of three-dimensional crescent-shaped gold nanoparticles are studied using a transformation optics methodology. The polarization insensitive, highly efficient, and tunable light harvesting ability of singular nanocrescents is demonstrated. We extend our approach to more realistic blunt nanostructures, showing the robustness of their plasmonic performance against geometric ...

While nose bluntness is known to have a large impact on the stability of hypersonic vehicles, its influence freestream receptivity process has not been fully characterized for wide range conditions. This paper investigates effects second mode coefficients and development boundary layer disturbances over two 7° half-angle circular blunt cones at Mach 10 after perturbation with broadband pulses d...

The present paper deals with a mathematical model of blood flow through narrow circular tube. The model consists of a core region of suspension of all the erythrocytes assumed to be a power law fluid and a peripheral cell-depleted layer of plasma as a Newtonian fluid. The system of differential equations has been solved analytically. The expressions for velocity profile, Bluntness parameter, fl...

Three equilibrium-air numerical solutions are presented for the Reentry-F ight-test vehicle at Mach 20, 80,000 ft. conditions, including turbulent t o w predictions. The three solutions are from a thin-layer Navier-Stokes code, coupled thin-layer and parabolized Navier-Stokes codes, and an approximate viscous shock-layer code. Boundary-layer and shock-layer prooles are presented and compared be...

Both analysis and numerical calculations have been carried out to investigate the relationship between Young’s modulus and nonideally sharp indentation parameters. The results confirm that there exists an approximate one-to-one correspondence between the ratio of nominal hardness/reduced Young’s modulus (Hn/Er) and the ratio of elastic work/total work (We/W) for any definite bluntness ratio ( h...