Drift Diffusion Tutorial
Application 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.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Tabella delle Funzionalità and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.