Applications Overview

Lethe has several applications that can be used depending on the problem that wants to be solved. Once Lethe is compiled, all the executables to these applications become available. In the following table a brief description of each application is provided:

Application	Description
lethe-fluid	This application solves the Navier-Stokes equations in a monolithic way. This is the most robust fluid dynamics solver in Lethe.
lethe-fluid-block	This application solves the Navier-Stokes equations in a monolithic way using block preconditioner.
lethe-fluid-matrix-free	This application solves the Navier-Stokes equations in a monolithic way and using a matrix-free approach.
lethe-fluid-nitsche	This application solves the Navier-Stokes equations by imposing immersed boundary conditions without discretizing the boundaries using the Nitsche method.
lethe-fluid-particles	This application allows to run unresolved Computational Fluid Dynamics-Discrete Element Method simulations.
lethe-fluid-sharp	This application solves the Navier-Stokes equations by imposing immersed boundary conditions without discretizing the boundaries using the sharp-edge method.
lethe-fluid-vans	This application solves the Volume-Averaged Navier-Stokes equations in a monolithic way.
lethe-particles	This application uses the Discrete Element Method to simulate particles.
lethe-rpt-3d	This application solves the Beam Monte-Carlo model for the interaction between gamma ray emitting particles and detectors.
lethe-rpt-cell-reconstruction-3d	This application reconstructs the position of particles using a cellular decomposition approach.
lethe-rpt-fem-reconstruction-3d	This application allows to reconstruct positions from ray tracing experimental measurements obtained by Radioactive Particle Tracking.
lethe-rpt-l2-projection-3d	This application calculates a volumetric projection of the Beam model on a finite element mesh using an L2 projection.