# Electric application: definition

## Available applications: reminder

Electric applications available in Flux are as follows:

• Electro Static application (2D/3D)
• Electric Conduction application (2D/3D)
• Steady State AC Electric application (2D/3D)
• Transient electric application (2D/3D)

Specific features of these applications are presented in chapter Electric applications: principles.

## Definition

To define complete conditions of modeling, the user must describe a certain number of specific characteristics, listed in the following blocks.

## Potential of reference (2D/3D)

The state variable in an electric application is the electric potential V. To completely define this potential V, it is necessary to impose this potential at least at one point.

The potential of reference can be set:

• on boundaries of the study domain on the infinite box (at infinity) and on symmetry planes with a normal electric field
• in the domain on a face, line, point region of imposed potential type

The possibilities provided for definition of the application are presented in the table below.

Potential of reference (on certain boundaries of the study domain)
imposed

The electric potential V takes an imposed value at infinity (at the level of the infinite box) and on symmetry planes with a normal electric field*

The value of the potential can be constant or described by a formula with input/output parameters.

floating The electric potential V takes an unidentified constant value at infinity (at the level of the infinite box) and on symmetry planes with a normal electric field*
Attention: * for 2D applications the electric potential is always set to 0 at infinity (at the level of the infinite box) and on the symmetry planes with a normal electric field.

## Domain type (2D specific feature)

It is possible to carry out a 2D plane study or an axisymmetric study for the same geometric description (in the XY-plane). These two possibilities are presented in the table below.

Type of study domain
2D Plane

The device, described in a XY-plane cross-section, is infinitely extended in a direction (The depth of the device is then necessary for the computation of global quantities such as force, torque or electric energy)

Axisymmetric

The device, described in a XY-plane cross-section, has a symmetry around the Y-axis

## Solver type (2D specific feature)

It is a priori possible to use one of the Flux 2D solvers or one of the Flux 3D solvers for the same geometric and physical description. These two options are presented in the table below.

Solver
Flux 2D solver

A solving process is carried out with a Flux 2D solver (it is the default option)

Flux 3D solver Not available for the electric applications in the current version (9.30)