/RADIATION
Block Format Keyword Describes the imposed radiation flux to environment.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/RADIATION/Radiative_Flux_ID/unit_ID | |||||||||
Radiative_Flux_title | |||||||||
surf_IDT | fct_IDT | sens_ID | |||||||
Ascalex | FscaleY | Tstart | Tstop |
Definition
Field | Contents | SI Unit Example |
---|---|---|
Radiative_Flux_ID | Imposed radiative flux
block identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier. (Integer, maximum 10 digits) |
|
Radiative_Flux_title | Imposed radiative flux
block title. (Character, maximum 100 characters) |
|
surf_IDT | Identifier for surface
which absorbs thermal radiation. (Integer) |
|
fct_IDT | Time function identifier
for the temperature of heat source
. (Integer) |
|
sens_ID | Sensor
identifier. (Integer) |
|
Ascalex | Abscissa (time) scale
factor for
fct_IDT. Default = 1.0 (Real) |
|
FscaleY | Ordinate (temperature)
scale factor for
fct_IDT. Default = 1.0 (Real) |
|
Tstart | Start
time. (Real) |
|
Tstop | Stop
time. (Real) |
|
Emissivity
. (Real) |
Example (Thermal Loading)
#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/12
unit for imposed radiation load
Mg mm s
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/RADIATION/1/12
RADIATION from heat source
# surf_ID fct_ID sens_ID
5 2003 0
# ASCALE FSCALE TSTART TSTOP E
0 0 0 0 0.15
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/FUNCT/2003
temperature of heat source function of time
# X Y
0 773
1 700
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
Comments
- The radiation
flux is calculated using:
(1) Where,- T
- Temperature of the surface (surf_IDT) which absorbs thermal radiation
- The Stefan-Boltzmann constant
(2) Since is a constant which depends on the units, the unit system must be set correctly in /BEGIN and in the optional unit_ID which is used by the radiative flux block.
- Thermal radiation is only compatible with the finite element formulation for heat transfer.
- /RADIATION is not compatible with ALE applications (/ALE, /EULER). Thermal radiation will not be applied to ALE nodes or ALE elements.