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OpenFOAM: The Open Source CFD Toolbox

OpenFOAM is a set of libraries and solvers for the solution of a wide range of problems in Fluid Dynamics and Continuum Mechanics from laminar simple regimes to DNS or LES including reactive turbulent flows. Many solvers have multiphysics features, where structural mechanics domains are coupled with CFD domains or new featrure available is a module for Molecular Dynamics (MD).

http://www.opencfd.co.uk/openfoam

OpeanFOAM  uses the finite volume method (FVM) on unstructured grids. Thus adapting easily to complex geometries and wide spectra of configurations.

Moreover, the package is automatically parallelized and it has a large set of useful utilities that allow importing and exporting meshes, configuration, etc. from and to Fluent, CFX, Paraview, Ensight, etc.

 

Starting and running OpenFOAM on SuperMUC

OpenFOAM (2.1 and 2.0)

To access Openfoam just load the module

    % module add openfoam

 

This sets all the environment variables for compiling, linking or running the standard solvers. If called for first time, it will also create suitable folders in your account with examples and templates.

So you are ready to start. You might run:



    % foamInstallationTest



to see whether the configuration is all right and getting more information. For stop using OpenFOAM, simply:


    % module unload openfoam



Please visit the module page for more information about modules. 


 


For running OpenFOAM, just submit  a script for the IBM loadleveler:


 



    

        
            
OpenFOAM-2.0 : batch Job example for IBM Loadleveller

        		
    

    

        
            
#!/bin/bash

            
#@ wall_clock_limit = 1:00:00

            
#@ job_name = [mytest]

            
#@ job_type = parallel

            
#@ class = general

            
#@ network.MPI = sn_all,not_shared,us

            
#@ node = 1

            
#@ tasks_per_node = 40

            
#@ initialdir = [My/Initial/dirrectory/../edit/this/line/accordingly]

            
#@ output = [/directory/file_ourput.out]

            
#@ error = [/directory/file_error.err]

            
#@ queue

            
. /etc/profile

            
. /etc/profile.d/modules.sh

            
 

            
 anyFoamSOLVER -case [dir_case] -parallel

        		
    




NOTES:


    
    
  • There are 40 cores for each node, and you will be charged for each node you request.  Therefore, it is advisable that the total number of tasks you specifiy is a multiple of 40.
    • 
    
  • However, you can still specify something like "tasks_per_node = 32" and "node=2"  to request  64 MPI tasks.
    • 
    
  • Alternatively, you can use "total_tasks=137" and "node=3";  where  total_tasks  is less or equal than  "node x 40". Keep in mind that tasks_per_node and total_tasks keywords can not be used together.
    • 



 


Starting and running OpenFOAM on Linux Cluster MPP


OpenFOAM (2.0)


To access this system use the front end system


% ssh [user]@lx64ia2.lrz.de


% ssh lxia4-1   (or lxia4-2) 


% module add openfoam 


The MPP cluster uses the SLURM job scheduler,  to send a job script to SLURM you have to login into this system first. 


 



    

        
            
OpenFOAM-2.0 : batch Job example for  MPP

        		
    

    

        
            
#!/bin/bash

            
#SBATCH -o [/directory/file_ourput.out]

            
#SBATCH -D [/my/initial/directory/]

            
#SBATCH -J [job_name]

            
#SBATCH --partition mpp1_batch

            
#SBATCH --ntasks=64

            
#SBATCH --mail-type=end

            
#SBATCH --mail-user=[email_address]@[domain]

            
#SBATCH --export=NONE

            
#SBATCH --time=08:00:00

            
source /etc/profile

            
srun_ps  anyFoamSOLVER -case [dir_case] -parallel

        		
    




 


Documentation


Once the module is added you will find the user's and programmer's  guide in :


$HOME/OpenFOAM/[username]-[OF version]/doc


 


A good starting point is copying the content of the tutorials folder ($FOAM_TUTORIALS) in your local OpenFOAM folder ($WM_PROJECT_USER_DIR)


% cp -r  $FOAM_TUTORIALS  $WM_PROJECT_USER_DIR 



Getting more Information


For detailed information about latest changes, new tutorials, new features, etc. refers to the OpenFOAM home Page or the OpenCFD site


Also, for getting out of troubles visit the OpenFOAM forum


 


Old Versions


Old versions of OpenFOAM will not be installed on the new systems. You must port to version 2.1 or 2.0.