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References in periodicals archive ?
Time-series data were collected over 2000 time steps and relevant statistics were obtained from the resolved scale quantities while the contributions from the subgrid scale stresses were also included.
Hughes, "Multiscale phenomena: Green's functions, the Dirichlet-to-Neumann formulation, subgrid scale models, bubbles and the origins of stabilized methods," Computer Methods Applied Mechanics and Engineering, vol.
The subgrid scale model in the LES simulation requires denser mesh with the mesh cells having much lower aspect ratio (AR) than in the case of RANS.
Nomachi, "One-equation subgrid scale model using dynamic procedure for the energy production," Journal of Applied Mechanics, Transactions ASME, vol.
The concept behind large-Eddy simulations is that only the large, energy-carrying scales of motion are computed exactly and the effect of the subgrid scales, which tend to be more isotropic and easier to parameterize than the large ones, is modeled.
This approach has a realistic potential of producing a parameterization of a similar or better quality to the existing physically based parameterizations that are used in GCMs, effectively taking into account subgrid scale (in terms of a GCM) effects at a fraction of the computational cost of the existing approaches.
We note that this formulation of habitat quality is overly simplistic: (1) each particle perceives only its own natal patch and (2) it fails to incorporate the logical corollary that the spatial distribution of birth locations should be patchy at the subgrid scale. We made simulations with each of 6 patch radii ranging from 5-50 m (Table 1).
In addition to the eight turbulence models, our study added two LES subgrid scale models and two DES models, as listed in Table 1.
[T.sub.ij] = subgrid Scale Stress tensor at the test level
where: [mu] is the viscosity, [[upsilon].sub.0] is the constant uniform turbulent diffusivity, [[mu].sub.air] is air viscosity, [[mu].sub.t] is turbulent viscosity computed using SGS (SubGrid Scale turbulent viscosity) model (Sabau, 2007).