I am a happy user of Elmer since a month and managed successfully to solve the Laplace equation for various geometries. For speeding up my simulations, I installed MS MPI and the MPI version of Elmer.
Partioning my model in 4 was easy with following command:
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ElmerGrid.exe 8 2 MeshFile.unv -autoclean -metis 4
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mpiexec.exe -n 4 ElmerSolver_mpi.exe
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ELMER SOLVER (v 8.4) STARTED AT: 2020/09/28 16:29:12
ELMER SOLVER (v 8.4) STARTED AT: 2020/09/28 16:29:12
ELMER SOLVER (v 8.4) STARTED AT: 2020/09/28 16:29:12
ELMER SOLVER (v 8.4) STARTED AT: 2020/09/28 16:29:12
ParCommInit:
ParCommInit:
ParCommInit:
Initialize #PEs: 4
ParCommInit:
Initialize #PEs: 4
Initialize #PEs: 4
Initialize #PEs: 4
MAIN:
MAIN: =============================================================
MAIN: ElmerSolver finite element software, Welcome!
MAIN: This program is free software licensed under (L)GPL
MAIN: Copyright 1st April 1995 - , CSC - IT Center for Science Ltd.
MAIN: Webpage http://www.csc.fi/elmer, Email elmeradm@csc.fi
MAIN: Version: 8.4 (Rev: Release, Compiled: 2020-08-03)
MAIN: Running in parallel using 4 tasks.
MAIN: Running with just one thread per task.
MAIN: Lua interpreted linked in.
MAIN: =============================================================
LoadInputFile: Reading only "Run Control" section
MAIN:
MAIN:
MAIN: -------------------------------------
MAIN: Reading Model: C:/Users/rduperri/Pro/CEA/Projets/RFQ_bas_cout/Calculs_FEM/case.sif
LoadInputFile: Scanning input file: C:/Users/rduperri/Pro/CEA/Projets/RFQ_bas_cout/Calculs_FEM/case.sif
LoadInputFile: Scanning only size info
LoadInputFile: First time visiting
LoadInputFile: Reading base load of sif file
LoadInputFile: Loading input file: C:/Users/rduperri/Pro/CEA/Projets/RFQ_bas_cout/Calculs_FEM/case.sif
LoadInputFile: Reading base load of sif file
LoadInputFile: Number of BCs: 3
LoadInputFile: Number of Body Forces: 0
LoadInputFile: Number of Initial Conditions: 0
LoadInputFile: Number of Materials: 1
LoadInputFile: Number of Equations: 1
LoadInputFile: Number of Solvers: 1
LoadInputFile: Number of Bodies: 1
Loading user function library: [StatElecSolve]...[StatElecSolver_Init0]
LoadMesh: Base mesh name: ./RFQ_TEST
LoadMesh: Elapsed REAL time: 0.1480 (s)
MAIN: -------------------------------------
AddVtuOutputSolverHack: Adding ResultOutputSolver to write VTU output in file: case
Loading user function library: [StatElecSolve]...[StatElecSolver_Init]
Loading user function library: [StatElecSolve]...[StatElecSolver_bulk]
Loading user function library: [StatElecSolve]...[StatElecSolver]
OptimizeBandwidth: ---------------------------------------------------------
OptimizeBandwidth: Computing matrix structure for: electrostatics...done.
OptimizeBandwidth: Half bandwidth without optimization: 7063
OptimizeBandwidth:
OptimizeBandwidth: Bandwidth Optimization ...done.
OptimizeBandwidth: Half bandwidth after optimization: 786
OptimizeBandwidth: ---------------------------------------------------------
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver_Init]
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver_bulk]
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver]
ElmerSolver: Number of timesteps to be saved: 1
MAIN:
MAIN: -------------------------------------
MAIN: Steady state iteration: 1
MAIN: -------------------------------------
MAIN:
SingleSolver: Attempting to call solver
SingleSolver: Solver Equation string is: electrostatics
StatElecSolve: -------------------------------------
StatElecSolve: STATELEC SOLVER:
StatElecSolve: -------------------------------------
StatElecSolve:
StatElecSolve: Electrostatic iteration: 1
StatElecSolve: Starting Assembly...
DefUtils::DefaultDirichletBCs: Setting Dirichlet boundary conditions
DefUtils::DefaultDirichletBCs: Dirichlet boundary conditions set
StatElecSolve: Assembly (s) : 0.18900000000000006
SolveSystem: Solution trivially zero!
StatElecSolve: Solve (s) : 0.0000000000000000
StatElecSolve: Result Norm : 0.0000000000000000
StatElecSolve: Relative Change : 0.0000000000000000
StatElecSolve:
Loading user function library: [StatElecSolve]...[StatElecSolver_post]
ComputeChange: SS (ITER=1) (NRM,RELC): ( 0.0000000 0.0000000 ) :: electrostatics
SingleSolver: Attempting to call solver
SingleSolver: Solver Equation string is: internalvtuoutputsolver
ResultOutputSolver: -------------------------------------
ResultOutputSolver: Saving with prefix: case
ResultOutputSolver: Creating list for saving - if not present
CreateListForSaving: Field Variables for Saving
ResultOutputSolver: Saving in unstructured VTK XML (.vtu) format
VtuOutputSolver: Saving results in VTK XML format with prefix: case
VtuOutputSolver: Saving number of partitions: 4
ResultOutputSolver: -------------------------------------
Loading user function library: [ResultOutputSolve]...[ResultOutputSolver_post]
ElmerSolver: *** Elmer Solver: ALL DONE ***
ElmerSolver: The end
SOLVER TOTAL TIME(CPU,REAL): 1.67 1.67
ELMER SOLVER FINISHED AT: 2020/09/28 16:29:14
Many thanks in advance for your help!
Romuald