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Statistical Predictability of Decaying Turbulence
Publisher: American Meteorological Society
Abstract: We use statistical models of turbulence with ?eddy damping? (EDQNM) in order to study the problem of predictability of freely evolving two- and three-dimensional isotropic turbulent flows. The application of statistical ...
Geostrophic versus Wave Eddy Viscosities in Atmospheric Models
Publisher: American Meteorological Society
Abstract: It is well established that at low Rossby and Froude numbers modes possessing potential vorticity behave differently from gavity-inertial wave modes. Wave energy cascades relatively more efficiently downscale to the ...
Synoptic and Frontal-Cyclone Scale Instabilities in Baroclinic Jet Flows
Publisher: American Meteorological Society
Abstract: Baroclinic instabilities of jet flows are investigated by means of numerical simulations of the nonhydrostatic Boussinesq equations on the f plane. Frontal small scales are accurately described thanks to precise numerical ...
Large Eddy Simulations of the Part-Load Instability in a Pump-Turbine in Pump Mode
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. To improve grid stability, pump-turbines (PTs) in pump storage plants are used in pump mode further away from their design point. In pump mode, a positive slope on the characteristic curve Hn-Q indicates an ...
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