CFD_STATE

CFD

Beta command

This command is in the beta stage and the format may change over time.

*CFD_STATE
"Optional title"
coid
$x_c$, $y_c$, $z_c$, $R$, $C_v$, $\gamma$, cid${}_{\rho}$, cid${}_e$
gid

Parameter definition

Variable
Description
coid
Command ID
$x_c$, $y_c$, $z_c$
Center coordinate
quantity: Length
$R$
Radius
quantity: Length
$C_v$
Heat capacity
quantity: Specific heat capacity
$\gamma$
Heat capacity ratio $(C_p/C_v)$
cid${}_{\rho}$
ID of a CURVE defining density versus time
cid${}_e$
ID of a CURVE defining specific energy versus time
gid
Geometry ID
default: not used

Description

This command is applied together with CFD_DOMAIN. It is used to prescribe the gas state (density and specific internal energy) inside a spherical region or inside a geometry with ID gid.

The referenced curves define the evolution of density and specific internal energy, while $C_v$ and $\gamma$ provide the necessary gas properties.