Command manual

Command list

LOAD_THERMAL_BODY

Loads
*LOAD_THERMAL_BODY
"Optional title"
coid, entype, enid, cid${}_1$, $sf$, $t_{beg}$, $t_{end}$, cid${}_2$

Parameter definition

VariableDescription
coid Command ID
entype Entity type
options: P, PS, ALL
enid Entity identification number
cid${}_1$ ID of a CURVE or FUNCTION $f_1$ defining the thermal body load versus time (power/unit volume)
$sf$ Curve scale factor
default: 1
$t_{beg}$ Start time
$t_{end}$ End time
default: 1.0e20
cid${}_2$ ID of an optional CURVE or FUNCTION $f_2$ defining the total thermal body load versus time (power)

Description

This command is used to apply a thermal body load (power per unit volume).

$f_2$ is an optional CURVE or FUNCTION describing the exact total power of the heat source. It is needed in situations where the heat source described by $f_1$ (power/unit volume) is partially outside the body where the energy is to be deposited. The magnitude of $f_1$ is then scaled with a factor $\alpha$ in order to match the specified total power in $f_2$.

$\displaystyle{ \alpha \int_V f_1(\mathbf{x}, t) \mathrm{d}V = f_2(t)}$

$V$ is the body volume, $\mathbf{x}$ is a spatial coordinate and $t$ is the time. Hence, the heat power per unit volume $p$ deposited at a location $\mathbf{x}$ becomes:

$p = \alpha \cdot f_1(\mathbf{x}, t)$