Experimental investigations were carried out in the Manchester Tidal flow Facility (MTF) to study the flow patterns in the region around and adjacent to a hypothetical headland in tidal (oscillatory) ambient flow. The Planar laser-induced fluorescence (PLIF) technique was used for visualization, with fluorescent dye released at specific points around the headland perimeter and in its adjacent r...

[1] The allochthonous supply of dissolved organic nitrogen (DON) from gyre margins into the interior of the ocean’s oligotrophic subtropical gyres potentially provides an important source of new N to gyre surface waters, thus sustaining export production. This process requires that a fraction of the transported DON be available to euphotic zone photoautotroph communities via mineralization. In ...

Silicon carbide grains of type X constitute ~1% of all presolar SiC grains found in primitive meteorites. These grains have N and Si excesses, mostly light C, high inferred Al/Al ratios, and evidence (from Ca and Ti excesses) for the initial presence of the short-lived radioisotopes Ti and V. These isotopic signatures clearly indicate an origin in the ejecta of Type II supernovae (SNe) and mate...

The fluid transport and mixing induced by beating cilia, present in the bronchial airways, are studied using a coupled lattice Boltzmann-Immersed Boundary solver. This solver allows the simulation of both single and multi-component fluid flows around moving solid boundaries. The cilia are modeled by a set of Lagrangian points, and Immersed Boundary forces are computed onto these points in order...

Abstract The mixing and combustion processes under different reference velocities in a gas turbine combustor were numerically investigated using the Flamelet Generated Manifold (FGM) model based on Reynolds Averaged Navier–Stokes (RANS) method. flow fields show strong self-similarity except slow auto-ignition layer between fuel-rich product fresh air upstream of flame stabilization position. ti...

We calculate solar models with convective overshooting at the top and at the base of the outer convection zone, and test the models by comparing their eigenfrequencies to the observed solar p-mode frequencies. Radiative temperature relaxation is included in form of a characteristic time that describes both optically thick and thin cases, and a modified mixing-length formalism is used, with gas ...

A radon-based nocturnal stability classification scheme is developed for a flat inland site near Bucharest, Romania, characterised by significant local surface roughness heterogeneity, and compared with traditional meteorologically-based techniques. Eight months of hourly meteorological and atmospheric radon observations from a 60 m tower at the IFIN-HH nuclear research facility are analysed. H...