Download High Performance Computing in Science and Engineering ’01: by Prof. Dr. Hanns Ruder, Dr. Roland Speith (auth.), Egon PDF

By Prof. Dr. Hanns Ruder, Dr. Roland Speith (auth.), Egon Krause, Willi Jäger (eds.)

The state-of-the-art in supercomputing is summarized during this quantity. The e-book provides chosen result of the tasks of the excessive functionality Computing heart Stuttgart (HLRS) for the 12 months 2001. jointly those contributions supply an outline of modern advancements in excessive functionality computing and simulation. Reflecting the shut cooperation of the HLRS with undefined, specific emphasis has been wear the commercial relevance of the provided effects and techniques. The e-book hence turns into a set of showcases for an leading edge utilization of cutting-edge modeling, novel numerical algorithms and using innovative excessive functionality computing platforms in a GRID-like setting.

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Extra info for High Performance Computing in Science and Engineering ’01: Transactions of the High Performance Computing Center Stuttgart (HLRS) 2001

Example text

The resulting relaxation oscillations are characterized by a surprisingly well defined period in spite of the chaotic nature of the fluctuating part of the velocity field as can be seen from the uppermost lines in each of the three plots of figure 2. 1 corresponds to the viscous decay time of the differential rotating and has been found to be rather independent of P, Ri or T. For other examples of these oscillations we refer to Grote et al. (2000b) and Grote and Busse (2001). Here we wish to demonstrate that the coherent structures of turbulent convection in rotating spherical shells are not limited to the case of internal heating.

The calculations have been compared with analytical solutions for this problem. Additionally, some code Simulations of Wavefields in Isotropic and Anisotropic Earth Models A y x 43 B y z Fig. 4. (A) Snapshots of the wavefronts due to line source (along the y axis) within an homogeneous isotropic elastic medium. The source characteristics are somewhat artificial and are chosen to illustrate the wavefronts for the three components simultaneously. Both, P and S wave energy is radiated. The circular wavefronts propagate within the x-z plane and the three orthogonal displacement components are shown (as indicated by X, Y, Z).

The Prandtl number is P = 1 in all cases. number for onset of convection in the polar regions is exceeded, the influence of equatorial symmetry diminishes and mixtures of quadrupolar and dipolar components of the magnetic field are generated without the nearly perfect correlation that characterizes hemispherical dynamos. Usually the quadrupolar part of the magnetic field is still strongest outside the tangent cylinder while the dipolar components appear to be generated primarily in the polar regions.

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