16.1.2 Volume Element Properties (Electric-Field Analysis)

16.1.2 Volume Element Properties (Electric-Field Analysis)#

Sets volume-element properties used for electric-field analysis (STATIC(2) = 2, 3).

Input settings#

16_1_3D_Element_Properties JSON key: volume element properties object

MAT_ID(16.1.2) Volume-element property ID.

ElectricProperty(16.1.2) Sets electric properties.

conductivity(16.1.2) Sets conductivity.

SIGMA(16.1.2) Conductivity.

SIGMA_XYZ(16.1.2) Conductivity factors in the x, y, and z directions of the local coordinate system.

FACTOR_XYZ(16.1.2) Conductivity factors in the x, y, and z directions of the local coordinate system.

permittivity(16.1.2) Sets relative permittivity.

EPS(16.1.2) Relative permittivity.

EPS_XYZ(16.1.2) Relative-permittivity factors in the x, y, and z directions of the local coordinate system.

FACTOR_XYZ(16.1.2) Relative-permittivity factors in the x, y, and z directions of the local coordinate system.

Input format#

Text-format section
Type:

Fixed parameter set 1

Number of rows:

1

Number of parameters:

3

Text format#
* MAT_ID * EPS * SIGMA *
     I      E      E

JSON format#

JSON format from 2024.11#
"16_Material_Properties" :
{
    "16_1_3D_Element_Properties" :
    [
        {
            "MAT_ID" : I,
            "ElectricProperty" :
            {
                "permittivity" :
                {
                    "comment" : "EPS_XYZ for anisotropic, or isotropic EPS if not defined.",
                    "EPS" : E
                },
                "conductivity" :
                {
                    "comment" : "SIGMA_XYZ for anisotropic, or isotropic SIGMA if not defined.",
                    "SIGMA" : E
                }
            }
        }
    ]
}

Detailed description#

Sets volume-element properties used for electric-field analysis.

16_1_3D_Element_Properties#

16_1_3D_Element_Properties#
JSON key:

Volume element properties object

MAT_ID#

MAT_ID(16.1.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [1, 1]
Data type:

Integer (I)

Description:

Volume-element property ID. The property ID of a volume element in the input mesh (a surface element in two-dimensional analysis).

ElectricProperty#

ElectricProperty(16.1.2)#
JSON key:

Specifies electric properties.

conductivity#

conductivity(16.1.2)#
JSON key:

Specifies conductivity.

SIGMA#
SIGMA(16.1.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [4, 1]
Type=E

Isotropic when > 0; anisotropic when < 0.

Data type:

Real number (E)

Unit:

S/m

Description:

Specifies conductivity.

Use SIGMA_XYZ when conductivity is anisotropic.

Effective for static electric-field analysis including conductors

Additional data: anisotropic conductivity#
SIGMA_XYZ(16.1.2)#
FACTOR_XYZ(16.1.2)#

Use SIGMA_XYZ(16.1.1) when conductivity is anisotropic.

Text-format section
Fixed parameter set 1#
[row, col] = [1, 2]
Type=I

[row, col] = [2:4, 2]
Type=E
Text format#
* COORDINATE_ID * FX * FY * FZ *
    0          0     1    1
JSON format#
JSON format from 2024.11#
    "SIGMA_XYZ" :
    {
        "COORD_ID" : 0,
        "FACTOR_XYZ" : [ 0.0, 1.0, 1.0 ]
    }
COORD_ID:

Local coordinate-system ID used to define anisotropy. COORD_ID(12)

FACTOR_XYZ:

Conductivity factors in the x, y, and z directions of the local coordinate system (0 <= FACTOR_XYZ <= 1). Specify as an array.

permittivity#

permittivity(16.1.2)#
JSON key:

Specifies permittivity.

EPS#
EPS(16.1.2)#
Text-format section
Fixed parameter set 1#
[row, col] = [4, 1]

Isotropic when > 0; anisotropic when < 0.

Data type:

Real number (E)

Description:

Relative permittivity. Use EPS_XYZ when relative permittivity is anisotropic.

Effective for electric-field analysis including dielectrics.

Additional data: anisotropic relative permittivity#
EPS_XYZ(16.1.2)#
FACTOR_XYZ(16.1.2)#

Use EPS_XYZ when relative permittivity is anisotropic.

Text-format section
Fixed parameter set 1#
[row, col] = [1, 2]
Type=I

[row, col] = [2:4, 2]
Type=E
Text format#
* COORDINATE_ID * FX * FY * FZ *
    0          0     1    1
JSON format#
JSON format from 2024.11#
    "EPS_XYZ" :
    {
        "COORD_ID" : 0,
        "FACTOR_XYZ" : [ 0.0, 1.0, 1.0 ]
    }
COORD_ID:

Local coordinate-system ID used to define anisotropy. COORD_ID(12)

FACTOR_XYZ:

Relative-permittivity factors in the x, y, and z directions of the local coordinate system (0 <= FACTOR_XYZ <= 1).