Parameters Guide

Launching an application requires an executable of the required solver, and a parameters file (with extension .prm). The parameter file controls all aspects of Lethe and drives the simulation. The parameter file is structured with different subsections, as explained in the following:

• General, CFD and Multiphysics
• Discrete Element Method (DEM)
• Unresolved CFD-DEM
• Sharp-Immersed-Boundary
• Radioactive Particle Tracking (RPT)

Tip

The complete options for the parameter file, with information regarding the parameters that can be used, can be obtained by doing the following:

• Go to /lethe/build/applications/navier_stokes_parameter_template/

• Run the navier_stokes_parameter_template using the command ./navier_stokes_parameter_template

Two parameter files, with default values for all the parameters, are obtained for 2D and 3D respectively.

Note

• The parameters are established one by one using the following syntax: set parameter name = value

• Comments are preceded by the sharp symbol (e.g. #comment)

• The parameter file format has a sanity checking mechanism in place and will throw an error if an unknown parameter or an invalid value is entered.