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These pages provide an access point to data contained in CCFE published journal papers.  By selecting a paper, and then a specific figure or table, you can request the related underlying data if it is available for release.

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Publication Figures

Publication Date:
0000-00-00

First Author:
D. Samaddar

Title:
Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code

Paper Identifier:
CP/16/234

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Figure Reference Title Description Number of Figure Data Items Identifier Download Figure Details
Figure 1 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 1 Cartoon to explain the numerical steps involved in the Parareal algorithm. 0 CF/16/235 Download
Figure 2 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 2 Plot of the computational mesh for the MAST simulations, along with the machine wall. 0 CF/16/246 Download
Figure 3 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 3 Plot of the computational mesh for the DIIID simulations, along with the machine wall. 0 CF/16/247 Download
Figure 4 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 4 Density calculated using the SOLPS-Eirene package, for MAST. 0 CF/16/248 Download
Figure 5 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 5 Density calculated using the fluid neutrals model in SOLPS, for MAST. 0 CF/16/249 Download
Figure 6 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 6 Density plotted for various parareal iterations (k) using the fluid neutrals model in SOLPS as coarse predictor, for MAST. 0 CF/16/250 Download
Figure 7a Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 7a Power flux to outer divertor calculated using the fluids model for neutrals in SOLPS, for MAST. 0 CF/16/251 Download
Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 7b Power flux to outer divertor calculated using the Eirene package for neutrals in SOLPS, for MAST, as a serial solution with one processor. 0 CF/16/252 Download
Figure 7c Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 7c Power flux to outer divertor calculated using the parareal algorithm in SOLPS, for MAST. 0 CF/16/253 Download
Figure 8 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 8 Density plotted for various parareal iterations (k) using the fluid neutrals model in SOLPS as coarse predictor, for MAST, for each parareal trime slice = 5. 0 CF/16/254 Download
Figure 9 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 9 Maximum total power flux impinging on the upper inboard divertor vs. time plotted for various parareal iterations (k) using the reduced grid model in SOLPS as coarse predictor. 0 CF/16/255 Download
Figure 10 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 10 Colors represent computational gain achieved by using the parareal algorithm. NTIMG (along the x-axis) represents the number of time-steps on each time slice solved per processor for the coarse run, and NTIMF (along the y-axis) represents the number of time-steps on each time slice solved per processor for the fine run. 0 CF/16/256 Download
Figure 11 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 11 Number of iterations required for convergence plotted against the number of time steps (NTIMF) for the fine computation. 2 cases for MAST are shown with grid sizes 76X36 and 76X18. 0 CF/16/257 Download
Figure 12 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 12 Weak scaling plot. Computational gain is plotted against processor numbers, keeping the size of the time slice solved per processor fixed. The plot corresponds to simulations performed for DIIID. 0 CF/16/258 Download
Figure 13 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 13 Strong scaling plot. Computational gain is plotted against processor numbers, keeping the size of the total simulated time fixed. The plot corresponds to simulations performed for DIIID. 0 CF/16/259 Download
Figure 14 Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code-Fig 14 Plot compares computational gain achieved by event-based parareal using python framework with a theoretical estimate of gain through traditional mpi implementation, for a MAST simulation. 0 CF/16/260 Download

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    Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB, UK. This work is funded by the UK Engineering and Physical Sciences Research Council (EPSRC) and EURATOM

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