Drift Diffusion Tutorial Model
Model ID: 8643
The Drift Diffusion interface solves a pair of reaction/advection/diffusion equations, one for the electron density and the other for the mean electron energy. This tutorial example computes the electron number density and mean electron energy in a drift tube. Electrons are released due to thermionic emission on the left boundary with an assumed mean electron energy. The electrons are then accelerated towards the right boundary due to an imposed external electric field which is oriented in the opposite direction from the electron drift velocity.
|DRIFT DIFFUSION: The foundation of the Plasma Module is the Drift Diffusion equation for the transport of electrons. This line graph plots the electron "temperature" computed by solving a pair of these equations.|