Spatial core-edge coupling of the particle-in-cell gyrokinetic codes GEM and XGC

Junyi Cheng; Julien Dominski; Yang Chen; Haotian Chen; Gabriele Merlo; Seung Hoe Ku; Robert Hager; Choong Seock Chang; Eric Suchyta; Eduardo D'Azevedo; Stephane Ethier; Sarat Sreepathi; Scott Klasky; Frank Jenko; Amitava Bhattacharjee; Scott Parker

doi:10.1063/5.0026043

Spatial core-edge coupling of the particle-in-cell gyrokinetic codes GEM and XGC

Junyi Cheng, Julien Dominski, Yang Chen, Haotian Chen, Gabriele Merlo, Seung Hoe Ku, Robert Hager, Choong Seock Chang, Eric Suchyta, Eduardo D'Azevedo, Stephane Ethier, Sarat Sreepathi, Scott Klasky, Frank Jenko, Amitava Bhattacharjee, Scott Parker

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15 Scopus citations

Abstract

Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transferring data between GEM's structured and XGC's unstructured meshes. Two examples of coupled simulations are presented to demonstrate the coupling scheme. The optimization of GEM for graphics processing unit is also presented.

Original language	English
Article number	122510
Journal	Physics of Plasmas
Volume	27
Issue number	12
DOIs	https://doi.org/10.1063/5.0026043
State	Published - Dec 1 2020

Funding

This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory (ORNL) and resources of the National Energy Research Scientific Computing Center (NERSC), which are supported by the Office of Science of the U.S. Department of Energy under Contract Nos. DE-AC05–00OR22725 and DE-AC02–05CH11231, respectively. This research was supported by the Exascale Computing Project (No. 17-SC-20-SC), a collaborative effort of the U.S. Department of Energy Office of Science and the National Nuclear Security Administration.

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title = "Spatial core-edge coupling of the particle-in-cell gyrokinetic codes GEM and XGC",

abstract = "Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transferring data between GEM's structured and XGC's unstructured meshes. Two examples of coupled simulations are presented to demonstrate the coupling scheme. The optimization of GEM for graphics processing unit is also presented.",

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T1 - Spatial core-edge coupling of the particle-in-cell gyrokinetic codes GEM and XGC

AU - Cheng, Junyi

AU - Dominski, Julien

AU - Chen, Yang

AU - Chen, Haotian

AU - Merlo, Gabriele

AU - Ku, Seung Hoe

AU - Hager, Robert

AU - Chang, Choong Seock

AU - Suchyta, Eric

AU - D'Azevedo, Eduardo

AU - Ethier, Stephane

AU - Sreepathi, Sarat

AU - Klasky, Scott

AU - Jenko, Frank

AU - Bhattacharjee, Amitava

AU - Parker, Scott

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transferring data between GEM's structured and XGC's unstructured meshes. Two examples of coupled simulations are presented to demonstrate the coupling scheme. The optimization of GEM for graphics processing unit is also presented.

AB - Two existing particle-in-cell gyrokinetic codes, GEM for the core region and XGC for the edge region, have been successfully coupled with a spatial coupling scheme at the interface in a toroidal geometry. A mapping technique is developed for transferring data between GEM's structured and XGC's unstructured meshes. Two examples of coupled simulations are presented to demonstrate the coupling scheme. The optimization of GEM for graphics processing unit is also presented.

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M3 - Article

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JF - Physics of Plasmas

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M1 - 122510

ER -

Spatial core-edge coupling of the particle-in-cell gyrokinetic codes GEM and XGC

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