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Elmer - Finite Element Analysis for Multiphysics Problems E-mail
Friday, 22 July 2011 20:58

Elmer is an open source multiphysical simulation software developed by CSC - IT Center for Science (CSC). Elmer development was started 1995 in collaboration with Finnish Universities, research institutes and industry. Elmer includes physical models of fluid dynamics, structural mechanics, electromagnetics, heat transfer and acoustics, for example. These are described by partial differential equations which Elmer solves by the Finite Element Method (FEM).Elmer is a Finite Element Analysis (FEA) software package for the solution of partial differential equations developed by CSC - IT (Center for Science). Elmer can deal with a great number of different equations, which may be coupled in a generic manner making Elmer a versatile tool for multiphysical simulations. As an open source software, Elmer also gives the user the means to modify the existing solution procedures and to develop new solvers for equations of interest to the user. Elmer offers a wide range of methods and techniques for the computational modeling of physical phenomena described by partial differential equations. In the following some of the most essential ones are summarized. The Elmer package contains solvers for a variety of mathematical models. The following list summarizes the capabilities of Elmer in specialized fields:

  • Heat transfer: models for conduction, radiation and phase change;
  • Fluid flow: the Navier-Stokes, Stokes and Reynolds equations, k-epsilon model;
  • Species transport: generic convection-diffusion equation;
  • Elasticity: general elasticity equations, dimensionally reduced models for plates and shells;
  • Acoustics: the Helmholtz equation;
  • Electromagnetism: electrostatics, magnetostatics, induction;
  • Microfluidics: slip conditions, the Poisson-Boltzmann equation;
  • Levelset method: Eulerian free boundary problems;
  • Quantum Mechanics: density functional theory (Kohn-Sham).

For approximation and linear system solution Elmer offers a great number of possibilities. The following list summarizes some of the most essential ones:

  • All basic element shapes in 1D, 2D and 3D with the Lagrange shape functions of degree k<=2;
  • Higher degree approximation using p-elements;
  • Time integration schemes for the first and second order equations;
  • Solution methods for eigenvalue problems;
  • Direct linear system solvers (Lapack & Umfpack);
  • Iterative Krylov subspace solvers for linear systems;
  • Multigrid solvers (GMG and AMG) for some basic equations;
  • ILU preconditioning of linear systems;
  • Parallelization of iterative methods;
  • The discontinuous Galerkin method;
  • Stabilized finite element formulations, including the methods of residual free bubbles and SUPG;
  • Adaptivity, particularly in 2D;
  • BEM solvers (without multipole acceleration).
Since Elmer is an open source product, it is possible to verify and modify the solution procedures! For more information about Elmer click here or on the official Wiki-Forum.

             
 

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