## Sekundärnavigation / Secondary navigation

## Inhaltsbereich / Content

# Radiative transport

Radiative transfer equations describe the movement and the interaction of particles (e.g. photons, electrons, heavy ions, ...) with other particles and their environment. Starting from a (coupled) system of ordinary differential equations (see also here) for a given set of particles different types of equations, depending on the type of interaction, arise in the limit "number of particles to infinity" (e.g. mean field or Fokker-Planck equations).

These are usually differential or integro-differential equations and are in general of high dimension, depending on space, time and velocity/direction of the particles. The numerical treatment of these equations is therefore very costly. This field is concerned with different methods for efficiently approximating these equations.

- Semi-Lagrange schemes of higher order for direct discretization of the equation
- Method of moments (Further approximation of the underlying kinetic equation)