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#Ups apollo 1100f manual code
The Gpic- MHD code advances particle and field quantities in time. The 3-dimensional gyrokinetic PIC (particle-in-cell) code for MHD simulation, Gpic- MHD, was installed on SR16000 (“Plasma Simulatorâ€), which is a scalar cluster system consisting of 8,192 logical cores. Naitou, Hiroshi Yamada, Yusuke Tokuda, Shinji Ishii, Yasutomo Yagi, Masatoshi HPC parallel programming model for gyrokinetic MHD simulation We will report on recent benchmarking studies between PIXIE3D and other 3D extended MHD codes, and will demonstrate its usefulness in a variety of fusion-relevant configurations such as Tokamaks and Reversed Field Pinches. In this talk, we will describe both the spatial discretization approach and the preconditioning strategy employed for extended MHD in PIXIE3D. We are currently in the process of extending such comparisons to fusion-relevant problems in realistic geometries. PIXIE3D has been thoroughly benchmarked against linear theory and against other available extended MHD codes on nonlinear test problems (such as the GEM reconnection challenge). PIXIE3D is fully parallel, employing PETSc for parallelism. Novel preconditioned ideas (so-called physics based), which were prototypes in the context of reduced MHD, have been adapted for 3D primitive-variable resistive MHD in PIXIE3D, and are currently being extended to Hall MHD. These methods have been shown to be scalable and efficient when preconditioned properly. Secondly, PIXIE3D features fully-implicit time stepping, employing Newton-Krylov methods for inverting the associated nonlinear systems. This is a fundamental requirement when one wants to study fusion plasmas with realistic conductivities.
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Firstly, it employs a novel conservative finite volume scheme which is remarkably robust and stable, and demands very small physical and/or numerical dissipation. PIXIE3D advances the state of the art in extended MHD modeling in two fundamental ways. It features a general geometry formulation, and is therefore suitable for the study of many magnetic fusion configurations of interest. PIXIE3D is a modern, parallel, state-of-the-art extended MHD code that employs fully implicit methods for efficiency and accuracy. International Nuclear Information System (INIS) PIXIE3D: An efficient, fully implicit, parallel, 3D extended MHD code for fusion plasma modeling Has the code been vectorized or parallelized?: Yes, parallelized using MPI. of bytes in distributed program, including test data, etc.: 19837671 Distribution format: tar.gz Programming language: FORTRAN 90/MPI. of lines in distributed program, including test data, etc.: 620503 No. Ireland Licensing provisions: Standard CPC licence, No. Catalogue identifier: AERP_v1_0 Program summary URL: Program obtainable from: CPC Program Library, Queen’s University, Belfast, N. Finally, we discuss the performance of the code on a parallel supercomputer with distributed memory architecture. We find good agreement with available results on this subject in the literature. The code is also applied to the problem of simulating the magnetorotational instability in 2.5D shearing box tests as well as in global simulations of magnetized accretion disks.
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We demonstrate the capabilities of GRADSPMHD by running 1, 2, and 3 dimensional standard benchmark tests and we find good agreement with previous work done by other researchers. The structure of the code closely follows the framework of our parallel GRADSPH FORTRAN 90 code which we added previously to the CPC program library.
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The code uses a tree-based formalism for neighbor finding and can optionally use the tree code for computing the self-gravity of the plasma. The implementation of the equations of SPMHD in the “GRAD-h†formalism assembles known results, including the derivation of the discretized MHD equations from a variational principle, the inclusion of time-dependent artificial viscosity, resistivity and conductivity terms, as well as the inclusion of a mixed hyperbolic/parabolic correction scheme for satisfying the ∇ṡB→ constraint on the magnetic field. We present GRADSPMHD, a completely Lagrangian parallel magnetohydrodynamics code based on the SPH formalism. GRADSPMHD: A parallel MHD code based on the SPH formalism
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