Aimé Fournier

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We first demonstrate the parallel performance of the dynam-ical core of a spectral element atmospheric model. The model uses continuous Galerkin spectral elements to dis-cretize the surface of the Earth, coupled with finite differences in the radial direction. Results are presented from two distributed memory, mesh interconnect supercomput-ers (ASCI Red and(More)
1 Usefulness of calculating Fourier series in the SEM In this note is presented a method, given nodal values on multidimensional nonconforming spectral elements, for calculating global Fourier-series coefficients. This method is " exact " in that given the approximation inherent in the spectral-element method (SEM), no further approximation is introduced(More)
We present an object-oriented geophysical and astrophysical spectral-element adap-tive refinement (GASpAR) code for application to turbulent flows. Like most spectral-element codes, GASpAR combines finite-element efficiency with spectral-method accuracy. It is also designed to be flexible enough for a range of geophysics and astrophysics applications where(More)
We first demonstrate the parallel performance of the dynamical core of a spectral element atmospheric model. The model uses continuous Galerkin spectral elements to discretize the surface of the Earth, coupled with finite differences in the radial direction. Results are presented from two distributed memory, mesh interconnect supercom-puters (ASCI Red and(More)
1 Historical and scientific context From a mathematical point of view the fundamental challenge of computational fluid dynamics arises from nonlinear terms in the governing dynamical equations, of which the prototype is the flow velocity u and its advection (u· ∇) u. It is commonly known that the most accurate and efficient method to compute the gradient(More)
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