Units

Units

 

Description

 

Here the keyword *UNITS to define problem units is described.

 

 

UNITS    Definition of problem units

Usage

*UNITS,  STRESS=Stress_units,  LENGTH=Length_units,  TIME=Time_units, TEMPERATURE=Temperature_units, TIME UPDATE=Time_units

Description

Defines the units for the current problem for generation of ParaGeo Units data structure. This is used for conversion of mass and temperature data.

 

Optional Parameters

STRESS

Defines units for stresses. Valid options are:

- Pa (Default)

- KPa

- MPa

- PSI

LENGTH

Defines units for length. Valid options are:

- m (Default)

- mm

- in

TIME

Defines units for time. Valid options are:

- s (Default)

- hrs

- years

- dyears

- cyears

- ka

- dka

- cka

- Ma

TEMPERATURE

Defines units for temperature. Valid options are:

- Celsius (Default)

- Kelvin

TIME UPDATE

Updates time units for auto-initialization of salt properties. Valid options are:

- s (Default)

- hrs

- years

- dyears

- cyears

- ka

- dka

- cka

- Ma

 

Examples

 

*UNITS, STRESS=MPa, LENGTH=m, TIME=Ma, TEMPERATURE=Celsius

 

1The units for the problem are specified.

 

 

*UNITS, TIME UPDATE=years

 

1The time units for the problem are updated to years. This is used for initializing models with salt, in which it is recommended to initialize the model via:

a. An initial stage with time units in 100s of years (cyears) used to relax deviatoric stress in salt so that an approximately isotropic stress state is achieved

b.A subsequent stage in which time units are changed to years so that the appropriate viscosity is used for production time scales.