Auxiliary Variables
The following table lists auxiliary variables that are associated with both names and mnemonics.
SET_DIAGRAM_AXIS and ENTER_SYMBOL in the DICTRA POST module.
Interface names are the same as the region names with the addition that you also have to specify if the interface is at the U(pper) or L(ower) end of the regions.

Name | Mnemonic | Argument |
---|---|---|
ACTIVITY |
AC(component) |
component |
DISTANCE |
|
|
FLUX |
JV(component) |
component |
LAMELLAR-SPACING |
LS(name) |
region name |
LAMELLAR-THICKNESS |
LT(name) |
phase name |
MOLE-FRACTION |
X(component) |
component |
MOLE-PERCENT |
|
component |
POSITION-OF-INTERFACE |
POI(name,U/L)up*) |
interface name |
TEMPERATURE-KELVIN |
T |
|
TEMPERATURE-CELSIUS |
- |
|
U-FRACTION |
UF(component) |
component |
VELOCITY-OF-INTERFACE |
VOI(name,U/L)up*) |
interface name |
WEIGHT-FRACTION |
W(component) |
component |
WEIGHT-PERCENT |
|
component |

There are also auxiliary variables that are only associated with a mnemonic.
Mnemonic | Description |
---|---|
GD |
global distance |
LD |
local distance |
M(phase,J) |
mobility coefficient where J=diffusing species |
LOGM(phase,J) |
10log of the mobility coefficient |
DT(phase,J) |
tracer diffusion coefficient where J=diffusing species |
LOGDT(phase,J) |
10log of the tracer diffusion coefficient |
DC(phase,J,K,N) |
chemical diffusion coefficient where K=gradient species, and N=reference species |
LOGDC(phase,J,K,N) |
10log of chemical diffusion coefficient |
DI(phase,J,K,N) |
intrinsic diffusion coefficient |
LOGDI(phase,J,K,N) |
10log of intrinsic diffusion coefficient |
JV(phase and/or species) |
flux in volume fixed frame of reference |
JL(phase and/or species) |
flux in lattice fixed frame of reference |
QC(phase,J,K,N) |
Q=R(ln (DC{T1}) - ln (DC{ T1+e}))/(1/(T1+e) - 1/ T1) |
QT(phase,J) |
Q=R(ln (DT{T1}) - ln (DT{T1+e}))/(1/(T1+e) - 1/ T1) |
QI(phase,J,K,N) |
Q=R(ln (DI{T1}) - ln (DI{T1+e}))/(1/(T1+e) - 1/T1) |
FC(phase,J,K,N) |
D0=exp(ln (DC{T1})+Q/R/ T1) |
FT(phase,J) |
D0=exp(ln (DT{T1})+Q/R/T1) |
FI(phase,J,K,N) |
D0=exp(ln (DI{T1})+Q/R/T1) |