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- W2047895629 abstract "The application of a new finite element (FE) technique for the solution of stratified,non-hydrostatic, low-Mach number flows is introduced in the context of mesoscale atmo-spheric modeling. In this framework, a Compressible Variational Multiscale (VMS-C)finite element algorithm to solve the conservative form of the Euler equations coupled tothe conservation of potential temperature was developed. Thismethodologyisnewinthefields of Computational Fluid Dynamics for compressible flows and in Numerical WeatherPrediction (NWP), and we mean to show its ability to maintain stability in the solution ofthermal, gravity-driven flows in a stratified environment. This effort is justified by the ad-vantages offered by a Galerkin finite element algorithm when m assive parallel efficiency is aconstraint, which is indeed becoming the paradigm for both CFD and NWP practitioners.The algorithm is validated against the standard test cases specifically designed to test thedynamical core of new atmospheric models. In the context of buoyantandgravityflowsthree tests are selected among those presented in the literature: the warm rising smoothanomaly, and two versions of the density current evolution from a cold disturbance definedby different initial conditions. The reference quantitative andqualitativevaluesaretakenfrom the literature and from the output obtained with the Weather Research and Forecastingmodel (WRF-ARW), a state-of-the-art research NWP model.Keywords: Numerical Weather Prediction, Low Mach, Compressible Flows, High Perfor-mance Computing" @default.
- W2047895629 created "2016-06-24" @default.
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- W2047895629 date "2010-01-04" @default.
- W2047895629 modified "2023-09-27" @default.
- W2047895629 title "Application of a Galerkin Finite Element Scheme to Atmospheric Buoyant and Gravity Driven Flows" @default.
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- W2047895629 doi "https://doi.org/10.2514/6.2010-690" @default.
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