Card 9 - MATCHANGE Material Property Change

KODE

KODE is the code MATCHANGE (or 63)

N1

N1 is the element number or group name whose material properties are to be changed. If N1 is of the 7-character format _Mxxxxx, where xxxxx is a MAT Card number (e.g. for MAT Card number 13 this would be _M00013) then the properties of the elements associated with MAT Card xxxxx will be changed.

T1

T1 is the material property code (e.g. ABSORPTIVITY). For material property codes, see Card 9 - MAT Material Property Definition.

T2

T2 is the material property value (e.g. .5). For rules on material property values, see Card 9 - MAT Material Property Definition.

Code example

$ The absorptivity of element 500 is specified to be 0.5.
$
MATCHANGE 500 ABSORPTIVITY .5
$
$ The thermal conductivity of elements of group HEATER is specified to be .92
$
MATCHANGE HEATER KTHERM .92

Note

Emissivity override may reference an expression in T2.

The following independent variables are supported in expressions for emissivity overrides:

• fluid_temperature
• heat_flow_rate
• mass_flow_rate
• pressure
• radius
• rotational_speed
• temperature
• temperature_difference
• thermal_capacitance
• thickness
• time
• volume_flow_rate
• x
• y
• z

For more information on expressions, see Card 9 - EXPRESSION Symbolic Expression Definition.