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Block Preconditioners for Stable Mixed Nodal and Edge finite element Representations of Incompressible Resistive MHD

Journal Article · · SIAM Journal on Scientific Computing
DOI:https://doi.org/10.1137/16M1074084· OSTI ID:1598347
 [1];  [2];  [2];  [3];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); University of Maryland, Department of Computer Science
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of Maryland, College Park, MD (United States)
The scalable iterative solution of strongly coupled three-dimensional incompressible resistive magnetohydrodynamics (MHD) equations is quite challenging because disparate time scales arise from the electromagnetics, the hydrodynamics, as well as the coupling between these systems. This study considers a mixed finite element discretization of a dual saddle point formulation of the incompressible resistive MHD equations using a stable nodal (Q2/Q1) discretization for the hydrodynamics and a stable edge-node discretization of a reduced form of the Maxwell equations. This paper introduces new approximate block factorization preconditioners for this system which reduce the system to approximate Schur complement systems that can be solved using algebraic multilevel methods. These preconditioners include a new augmentation-based approximation for the magnetic induction saddle point system as well as efficient approximations of the Schur complements that arise from the complex coupling between the Navier--Stokes equations and the Maxwell equations.
Research Organization:
Lockheed Martin Corpration, Litteton, CO (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
Grant/Contract Number:
AC04-94AL85000; SC0009301
OSTI ID:
1598347
Journal Information:
SIAM Journal on Scientific Computing, Journal Name: SIAM Journal on Scientific Computing Journal Issue: 6 Vol. 38; ISSN 1064-8275
Publisher:
SIAMCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

A face‐based monolithic approach for the incompressible magnetohydrodynamics equations journal May 2020
Second order unconditionally convergent and energy stable linearized scheme for MHD equations journal August 2017

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