Large-eddy simulation (LES) seeks to predict the dynamics of spatially filtered turbulent flows. By construction, the LES solution contains only scales of size ≥ ∆, where ∆ denotes some user-chosen length scale of the spatial filter. A large-eddy simulation based on an eddy-viscosity model and a Navier-Stokes simulation differ only in diffusion coefficient. Therefore, we focus on the question: ...

The combination of the Reduced Basis and Empirical Interpolation Method (EIM) approaches have produced outstanding results in many disciplines. In particular, gravitational wave (GW) science these range from building non-intrusive surrogate models for GWs to fast parameter estimation adding use Order Quadratures. These surrogates salient feature being essentially indistinguishable or very close...

background: radon and its short-lived decay products are considered as the important sources of public exposure to natural radioactivity. the synergistic interaction between tobacco smoking and radon is known to be an actual problem. this study has provided a mathematical description and prognosis of the carcinogenic effects after combined action of radon with smoking. materials and methods: a ...

This paper presents a new dynamic one equation eddy viscosity model for LES of compressible flows. Based on the compressible version of dynamic Smagorinsky model (DSM), the transport equation for sub-grid scale (SGS) kinetic energy (KE) is introduced to predict SGS KE, instead of the commonly used Yoshizawa’s model. The SGS KE transport equation for compressible flow is derived, and the unclose...

One of the main elements safe operation gravity flow racks used in pallet is a brake roller. The most promising design centrifugal roller magnetic (eddy current) type. principle such rollers based on laws electromagnetic induction and involves deceleration conductor moving field, due to interaction eddy currents (or Foucault currents) arising volume conductor, with an external field. mathematic...

The time-mean effects of eddies are studied in a model based on the Parsons–Veronis–Huang–Flierl models of the wind-driven gyre. Much of the analysis used for the steady solutions carries over if the model is cast in terms of the thickness-weighted mean velocity, because then mass transport is nondivergent in the absence of diabatic forcing. The model exemplifies the use of residual mean theory...

An analytical model for a coastal boundary current was used to investigate heat and salt budget of exchange flows in the Persian Gulf as a marginal sea. Coastal boundary currents exchange heat and freshwater with the mosphere and the offshore waters. As heat and salinity fluxes caused by air-sea interaction and eddy activities, different temperature and salinity associated with boundary current...

Nondestructive evaluation NDE is implemented in various industrial sectors. Different modalities have been developed for NDE applications during the last few decades. There is a tradeoff between advantages and limitations associated with each technique and even within the same technique using different inspection parameters. This research is oriented to enhance electromagnetic NDE using image f...

As the surface drag is increased in a comprehensive general circulation model (GCM), the upper-level zonal winds decrease and eddy momentum flux convergence into the jet core increases. Globally averaged eddy kinetic energy decreases, a response that is inconsistent with the conventional barotropic governor mechanism whereby decreased barotropic shears encourage baroclinic wave growth. As the c...