Infinite box: about

Principle of use

If the study domain is limited using the infinite box technique, the infinite box must be attached to the study domain. There is only one infinite box per study domain.

The boundary conditions on the corresponding boundaries of the infinite box are set automatically in the physical module.

Infinite box 2D domain:

The infinite boxes available for 2D study domain and their characteristics are presented in the table below.

Infinite box Characteristics

disc:

• centered in (0,0) in the global coordinate system
• comprises 8 points, 4 lines
• dimensions set by the user

Infinite box: 3D domain

The infinite boxes available for 3D study domain and their characteristics are presented in the table below.

Infinite box Characteristics

parallelepiped :

• centered in (0,0,0) in the global coordinate system
• comprises 16 points, 32 lines
• dimensions set by the user

cylinder :

• along the axis X, Y or Z
• centered in (0,0,0) in the global coordinate system
• comprises 32 points, 32 lines
• dimensions set by the user

Parameter setting

Dimensions of the infinite box are defined using algebraic expression. The algebraic expression can contain:

• constants
• geometric parameters (created beforehand)
• basic mathematical functions using operators : +, -, *, /, ( )
• usual mathematical functions admitted by Fortran.

The mathematical functions are described in section Functions.