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Elmer examples

Examples of modeling work performed with Elmer software

These examples give a fairly representative view on the capabilities of Elmer. The most important physical models are also explained briefly. Many of the examples are simple in geometry but this does not reflect any shortcoming of ElmerSolver. You may also download a brochure (pdf) of the capabilities of Elmer.



Examples in various fields of physics


Heat Transfer

In heat transfer Elmer includes convective, diffusive and radiative heat transfer.


Solid mechanics

In solid mechanics Elmer includes general elasticity and reduced dimensional models, i.e. plates and shells. Orthotropic materials, damping and other complications may be accounted for.



Fluid mechanics

In fluid mechanics Elmer includes Navier-Stokes equations for compressible and incompressible (low Mach number) flows. Stabilization is achieved by SUPG or residual free bubbles. Turbulence models include Spalart-Almaras,  k-epsilon, (SST) k-omega, and v^2-f. For FSI-problems an ALE formulation is available also many different kinds of free surface models (Lagrangian and Eulerian) may be used. There is also a dimensionally reduced flow model, i.e. the Reynolds equation.


Earth Science


Electromagnetics

Electromagnetics mainly includes special cases of the Maxwell's equations that may be expressed in terms of scalar or vector potentials.



Acoustics

Acoustics includes Helmholtz equation with the possibility of convection and damping. Also dissipative acoustics in terms of linearized time-harmonic Navier-Stokes equations have been modeled with Elmer.



Quantum mechanics

Quantum mechanics includes an all-electron version of the Kohn-Sham equations.


Coupled problems

Generally, most physical models in Elmer may be coupled with one-another. Therefore there is no point of summarizing the capabilities in coupled problems.



Examples of industrial applications


Czochralski crystal growth

The growth of mono-crystalline silicon by the Czochralski method was one of the initial applications of Elmer and it still provides plenty of challenges.


Simulation of micro-electro-mechanical (MEM) components

MEMS provides a nice field of multiphysical simulation. Elmer has been used to solve most coupling types in steady state, transient and time-harmonic systems.



Optical fiber manufacturing

Fiber manufacturing provides also many interesting cases, particularly in the area of free surface problems.


Nozzle flow

This example has been provided by an Elmer user who use the simulations to optimize the nozzle geometries.



Examples related to numerical methods


Linear algebra

After the equations are discretized the problem is reduced to the solution of linear equations. The main iterative method are Krylow subspace methods and multilevel methods which show different scaling with problem size.