ForceDensity¶

Type:	1-Tensor, or section
Range:	[v_1, …, v_3]
Default:	-/-
Appearance:	optional

Specifies a mechanical force density, $\VField{F}^{\mathrm{V}}$ , as used for continuum mechanical problems. Units are newtons per cubic meter, $\units{N/m^3}$ .

Note

A ForceDensity is only definable for a physical domain. So, setting BoundaryId in the parent section is not allowed.

A constant force density can be defined by assigning a 3-vector:

# define a constant force density
ForceDensity = [..., ... , ...]

For more general cases, a force density may be given as a section in order to deal with space, time, and parameter dependent definitions:

# define a force density as a section
ForceDensity {
  Constant {...}
  Python {...}
  ...
}

Field definitions within this section are summed up. Consult the subsequent sections to see which types of field definitions are allowed.