Vertical Axis Wind Turbines (VAWTs) are not mature enough yet for offshore wind farms, but they offer benefits compared to conventional Horizontal (HAWTs). Higher power densities, reduced wakes, lower center of mass, and different thrust curves make VAWTs an interesting option complement existing farms. The optimization farm layouts—finding the optimal positions turbines in a park—has proven cr...

Energy is an important aspect of our everyday life. The resources we use are limited whereas the population consuming same increasing day by day. Nowadays requirement for electricity much higher than its generation; hence main objective work to produce at low cost with no effect on environment. design a wind turbine recapture energy from vehicles highway. A considerable amount produced due pres...

An idealized atmospheric model is employed to quantify the strength of the eddy feedback and the persistence of the zonal index. The strength of the surface frictional damping on the zonal index is varied, and an external zonal momentum forcing is included to compensate for the momentum change associated with the friction change such that the climatological jet latitude and shape are unchanged....

13 The South China Sea is a marginal basin with a complex circulation influenced by the 14 East Asian Monsoon, river discharge and intricate bathymetry. As a result, both the mesoscale 15 eddy field and the near-inertial energy distribution display large spatial variability and they 16 strongly influence the oceanic transport and mixing. 17 With an ensemble of numerical integrations using a reg...

in the present paper, an analysis was carried out to investigate effects of radiation on a free convection flow bounded by a vertical surface embedded in a porous medium with constant suction velocity. it was under the influence of uniform magnetic field in the presence of a homogenous chemical reaction and viscous dissipation with constant heat and mass flux. the non-dimensional governing equa...

Road vehicles can expend a significant amount of energy in undesirable vertical motions that are induced by road bumps, and much of that is dissipated in conventional shock absorbers as they dampen the vertical motions. Presented in this paper are some of the results of a study aimed at determining the effectiveness of efficiently transforming that energy into electrical power by using optimall...

233 hours of high-precision vertical wind and temperature measurements in the mesosphere and lower thermosphere (MLT) were used to study the spectra of gravity wave perturbations in the mesopause region. The temperature spectra are generally consistent with the theoretical predictions of gravity wave theory. The averaged slope of the frequency (f) spectra is –1.83±0.08, while the slope of the v...

Giant planets embedded in circumstellar discs are expected to open gaps in these discs. We examine the vertical structure of the gap edges. We find that the planet excites spiral arms with significant (Mach number of a half) vertical motion of the gas, and discuss the implications of these motions. In particular, the spiral arms will induce strong vertical stirring of the dust, making the edge ...

We have performed numerical simulations of a radially perturbed “accretion” torus around a black hole or neutron star and find that the torus performs radial and vertical motions at the appropriate epicyclic frequencies. We find clear evidence that vertical motions are excited in a nonlinear resonance when the applied perturbation is periodic in time. The strongest resonant response occurs when...