Magnusdottir, G. Schubert, W. H.

A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of “vorticity coordinates”—that is, new coordinates whose Jacobian with respect to the original spherical coordinates is the dimensionless absolute isentropic vorticity. The...

Magnusdottir, G. Schubert, W. H.

A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of “vorticity coordinates”—that is, new coordinates whose Jacobian with respect to the original spherical coordinates is the dimensionless absolute isentropic vorticity. The...

Magnusdottir, G. Schubert, W. H.

A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of “vorticity coordinates”—that is, new coordinates whose Jacobian with respect to the original spherical coordinates is the dimensionless absolute isentropic vorticity. The...

Magnusdottir, G. Schubert, W. H.

A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of “vorticity coordinates”—that is, new coordinates whose Jacobian with respect to the original spherical coordinates is the dimensionless absolute isentropic vorticity. The...

Magnusdottir, G. Schubert, W. H.

A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of “vorticity coordinates”—that is, new coordinates whose Jacobian with respect to the original spherical coordinates is the dimensionless absolute isentropic vorticity. The...

Roka, Zsuzsanna

We consider cellular automata on Cayley graphs and compare their computational powers according to the architecture on which they work. We show that, if there exists a homomorphism with a finite kernel from a group into another one such that the image of the first group has a finite index in the second one, then every cellular automaton on the Cayl...

Pignol, Valérie

Ce travail est consacré à l'étude de structures cellulaires bidimensionnelles et notamment à leur évolution au cours du temps. Après une phase transitoire (dont la durée dépend de l'ordre initial de la structure) l'évolution atteint généralement un régime stationnaire (où l'aire moyenne des cellules varie linéairement avec le temps et où les propri...

De Sainte Claire, Pascal Schultz, D. Weinhaus, S. Hanley, L. Hase, William

This paper presents classical dynamics simulations of Si(CD3)3+scattering from a hexanethiolate self-assembled monolayer on Au(111) and from a clean Au(111) surface. Simulations are performed with a united atom model using purely repulsive scattering potentials. These simulations predict the partitioning of the incident ion kinetic energy into the ...

Henry, Daniel Buffat, Marc

The convective flows which arise in shallow cavities filled with low-Prandtl-number fluids when subjected to a horizontal temperature gradient are studied numerically with a finite element method. Attention is focused on a rigid cavity with dimensions 4x2x1, for which experimental data are available. The three-dimensional results indicate that, aft...

Skauvik, Inge
Published in
Metals and Materials

FEM models are generally expensive, time consuming and yielding a large amount of information, much of which of secondary interest. In many cases the information sought can be given as one or a few key figures although complete fields of stresses, velocities or temperatures are computed throughout the entire model domain. If FEM analysis is used fo...