Domain variables

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(Derived variables)
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(Derived variables)
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; Pid : Parent box process ID ; Pid : Parent box process ID
; Id : Parent box ID ; Id : Parent box ID
 +; Orthogonality : deviation (in degrees) from orthogonality of the local coordinate system (when using [[Object_hierarchy#General_orthogonal_coordinates|general orthogonal coordinates]])

Current revision

The following domain variables are predefined. Other domain variables can be added dynamically using GfsVariable and its descendants.

Primary variables

x-component of the velocity
y-component of the velocity
z-component of the velocity
approximate projection pressure
Pmac 
MAC projection pressure

Derived variables

x-coordinate of the center of mass of the cell
y-coordinate of the center of mass of the cell
z-coordinate of the center of mass of the cell
ax 
x-coordinate of the center of area of the solid surface
ay 
y-coordinate of the center of area of the solid surface
az 
z-coordinate of the center of area of the solid surface
cx 
x-coordinate of the center of the cell
cy 
y-coordinate of the center of the cell
cz 
z-coordinate of the center of the cell
rx 
x-coordinate of the center of the cell in the Gerris coordinate system (identical to cx when not using coordinate mapping)
ry 
y-coordinate of the center of the cell in the Gerris coordinate system
rz 
z-coordinate of the center of the cell in the Gerris coordinate system
dV 
volume of the cell
dL 
length of the cell
physical time
dt 
timestep
Vorticity 
norm of the vorticity vector of the velocity field
Divergence 
divergence of the velocity field
Velocity 
norm of the velocity vector
Velocity2 
squared norm of the velocity vector
Level 
quad/octree level of the cell
fluid fraction of the cell
area of the solid contained in the cell
Sr 
fluid fraction of the right cell face
Sl 
fluid fraction of the left cell face
St 
fluid fraction of the top cell face
Sb 
fluid fraction of the bottom cell face
Sf 
fluid fraction of the front cell face
Sk 
fluid fraction of the back cell face
Lambda2 
vortex-detection criterion of Jeong & Hussain
Curvature 
curvature of the local streamline
D2 
second principal invariant of the deformation tensor
Pid 
Parent box process ID
Id 
Parent box ID
Orthogonality 
deviation (in degrees) from orthogonality of the local coordinate system (when using general orthogonal coordinates)
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