Improved Solver Settings for 3D Exploding Wire Simulations in ALEGRA | Zendy

Robert Doney | Zendy; Christopher Siefert | Zendy; John Niederhaus | Zendy

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Improved Solver Settings for 3D Exploding Wire Simulations in ALEGRA

Author(s) -

Robert Doney,

Christopher Siefert,

John Niederhaus

Publication year - 2016

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/1562202

Subject(s) - multiphysics , solver , multigrid method , preconditioner , computational science , computer science , code (set theory) , matrix (chemical analysis) , algebraic number , parallel computing , algorithm , physics , mathematics , programming language , iterative method , finite element method , materials science , mathematical analysis , set (abstract data type) , quantum mechanics , partial differential equation , composite material , thermodynamics

: We are interested in simulating a variety of problems in 3 dimensions featuring large electric currents using the Sandia National Laboratories multiphysics code, ALEGRA. However, many such simulations were prohibitively slow due in part to unoptimized(matrix) solver settings. In this report, we address that by varying 6 parameters in the algebraic multigrid preconditioner, Trilinos/ML, as implemented in ALEGRA. Three parameters impacted performance with one dominating. We provide insight to solver behavior as well as recommended values.

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