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Hi all, I am wondering, is there any way to set default solver? Right now it is MUMS (I use wave wave optics module, Frequency domain and Mode analysis), but for my PC it is much faster with PARDISO solver (Intel Core i5-4570, 16GB RAM).

COMSOL will automatically choose a direct or iterative solver when solving ... The direct solvers used by COMSOL are the MUMPS, PARDISO, ...

The PARDISO solver, used for shared-memory computations, is also available in the Intel® Math Kernel Library software product. In previous versions, when selecting the PARDISO solver option while running your model on a cluster, the MUMPS solver was used instead, due to the lack of an alternative direct solver on clusters.

Posted May 30, 2019, 4:00 a.m. EDT General, Studies & Solvers Version 5.4 2 Replies ... When the memory (e.g RAM) used by PARDISO is full, PARDISO tries (if ...

There are direct solvers in COMSOL. MUMPS; PARDISO; SPOOLES. For a well-conditioned Finite Element problem, these 3 solvers differ in their computation time to ...

PARDISO PARDISO 7.2 Solver Project (December 2020) The package PARDISO is a thread-safe, high-performance, robust, memory efficient and easy to use software for solving large sparse symmetric and unsymmetric linear systems of equations on shared-memory and distributed-memory multiprocessors.

Right now it is MUMS (I use wave wave optics module, Frequency domain and Mode analysis), but for my PC it is much faster with PARDISO solver ( ...

Direct. The Direct node () is an attribute that handles settings for direct linear system solvers. Use it together with a Stationary Solver, Eigenvalue Solver, and Time-Dependent Solver, for example. The attribute can also be used together with the Coarse Solver attribute when using multigrid linear system solvers.

PARDISO PARDISO 7.2 Solver Project (December 2020) The package PARDISO is a thread-safe, high-performance, robust, memory efficient and easy to use software for solving large sparse symmetric and unsymmetric linear systems of equations on shared-memory and distributed-memory multiprocessors.

COMSOL Multiphysics uses the PARDISO version developed by Olaf Schenk and collaborators , which is included with Intel ® MKL (Intel Math Kernel Libraries). The SPOOLES Solver The SPOOLES solver works on general systems of the form Ax = b using the multifrontal method and direct LU factorization of the sparse matrix A .

Direct. The Direct node () is an attribute that handles settings for direct linear system solvers. Use it together with a Stationary Solver, Eigenvalue Solver, and Time-Dependent Solver, for example. The attribute can also be used together with the Coarse Solver attribute when using multigrid linear system solvers.

Fully Coupled Versus Segregated Solution Approach

The following pertains to the Direct attribute node. All linear system solvers above work on general sparse linear systems of the form Ax = b and use LU factorization on the matrix A to compute the solution x.In doing so, they use a preordering algorithm that permutes the columns of A to minimize the number of nonzeros in the L and U factors. Popular preordering algorithms …

ParallelSparseDirectSolverPARDISO—UserGuideVersion7.2 6 A= A 11 A 12 A 21 A 22 : AtraditionalapproachtocomputetheexactSchurcomplementS= A 22 A 21A 1 11 A 12 ...

Linear Static Finite Element Problem

Studies and Solvers. COMSOL Multiphysics ® version 5.2a includes new and updated solvers, added support for absorbing layers for wave propagation in the time domain, a new Multiphysics table for enabling and disabling multiphysics couplings in a study, and more. Browse all of the COMSOL Multiphysics ® version 5.2a updates pertaining to studies and solvers below.

COMSOL uses PARDISO as the suggested direct solver but it goes out of core. I've read that using an iterative solver may help, but also that ...

Let me try to give you a not very formal answer: MUMPS is a direct solver, ... Use PARDISO to utilize the full core benefit of COMSOL. however if you have ...

31.05.2019 · Hi Lasse, I believe that you are experiencing a memory limit warning with PARDISO. When the memory (e.g RAM) used by PARDISO is full, PARDISO tries (if enabled - I think it is enabled by default) to switch from the current in-core mode to an out-of-core mode where it will store/manipulate data on the disk space available in the temporary Comsol folder on your hard …

How to specify the storage path for PARDISO out-of-core . Posted 24 mar 2010, 17:41 CET 2 Replies

The Direct solvers available within COMSOL Multiphysics are PARDISO, MUMPS, and SPOOLES, as well as a Dense Matrix Solver. Either PARDISO or MUMPS are ...

I can solve a system of time-dependent, General Form PDEs using MUMPS as a direct solver on an interval [0,T] where T>0 is given.

The MUMPS and SPOOLES solvers run distributed when running COMSOL Multiphysics in distributed mode (on clusters, for example). All linear system solvers ...

PARDISO (parallel sparse direct solver). ... See Running COMSOL Multiphysics. ... the nested dissection faster when COMSOL Multiphysics runs multithreaded), ...