Elmer

Introduction

Elmer is an open source (GPL) computational tool for multi-physics problems. It is developed by CSC in collaboration with Finnish universities, research laboratories and industry. To test ONELAB models working with Elmer, you shall need a working installation of the code. The easiest way to do so, is to install first the generic ONELAB virtual machine on your system by following these instructions. When done, log in into the virtual machine (username: "olvm", passwd: olvm) and proceed with the installation of Elmer, and downloading benchmark ONELAB models. Instructions to do so are given in the next section.

Installation

The Virtual machine is configured so that Gmsh and Elmer can be installed straightforwardly by issuing simple commands in a terminal. You have to be online. Proceed as follows.

Step 1 - Download installation scripts

Open a terminal by clicking on the "terminal" icon in the launcher panel and issue the command

install_scripts.sh

Step 2 - Install Gmsh and Onelab

Then the command

install_gmsh.sh

downloads the nightly-build of Gmsh from http://geuz.org/gmsh, install it, and place a Gmsh icon on the Desktop.

Step 3 - Install Elmer

The command

install_elmer.sh

downloads the source code of Elmer and compile it on the virtual machine. This takes several minutes.

After these 3 steps, you have a woking installation of Gmsh and Elmer on the virtual machine.

Step 4 - Download model examples

The model examples detailed in the next section are downloaded in a directory named ELMERMODELS with the command

getElmerModels.sh

ONELAB models

Cryotherapy : Thermal analysis of the cryogenic treatment of warts

Beam3D : Didactical model of a 3D cantilever elastic beam

Laser : Thermal analysis of laser skin stimulation

Drug patch : Analysis of drug diffusion from a patch into the skin