Improvements of the particle-in-cell code EUTERPE for petascaling machines |
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Authors: | Xavier Sáez Alejandro Soba Edilberto Sánchez Ralf Kleiber Francisco Castejón José M Cela |
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Affiliation: | aBarcelona Supercomputing Center (BSC-CNS), Barcelona, Spain;bLaboratorio Nacional de Fusión, Madrid, Spain;cMax-Planck-Institut für Plasmaphysik, EURATOM-Association, Greifswald, Germany |
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Abstract: | In the present work we report some performance measures and computational improvements recently carried out using the gyrokinetic code EUTERPE (Jost, 2000 1] and Jost et al., 1999 2]), which is based on the general particle-in-cell (PIC) method. The scalability of the code has been studied for up to sixty thousand processing elements and some steps towards a complete hybridization of the code were made. As a numerical example, non-linear simulations of Ion Temperature Gradient (ITG) instabilities have been carried out in screw-pinch geometry and the results are compared with earlier works. A parametric study of the influence of variables (step size of the time integrator, number of markers, grid size) on the quality of the simulation is presented. |
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Keywords: | PIC code MPI-OpenMP Hybrid codes ITG instabilities |
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