*PHYSICAL CONSTANTS

Specify physical constants.

This option is used to define physical constants necessary for an analysis; because Abaqus has no built-in units, no default values are provided. If a physical constant required for the analysis is not given, Abaqus issues a fatal error message. The units used for the constants must be consistent with the remaining input data.

This page discusses:

See Also
In Other Guides
Uncoupled Heat Transfer Analysis
Mass Diffusion Analysis
Fluid Cavity Definition
Rate-Dependent Plasticity: Creep and Swelling
Diffusivity
Solubility
Thermal Contact Properties
Cavity Radiation in Abaqus/Standard
Obtaining Physical Constants in an Abaqus/Standard Analysis

ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/CAE

TypeModel data

LevelModel

Abaqus/CAEModel attribute

Optional parameters

ABSOLUTE ZERO

Set this parameter equal to the absolute zero on the temperature scale chosen. For example, if the analysis uses temperature in degrees Celsius, set ABSOLUTE ZERO=−273.15.

AVOGADRO NUMBER

Set this parameter equal to the Avogadro number. For example, AVOGADRO NUMBER=6.02214086 × 1023 mol-1 in SI units.

BOLTZMANN

Set this parameter equal to the Ludwig Boltzmann constant. For example, BOLTZMANN=1.380662 × 10−23 joule per kelvin molecule in SI units.

ELEMENTARY CHARGE

Set this parameter equal to the elementary charge number. For example, ELEMENTARY CHARGE=1.60217662 × 10−19 Coulombs in SI units.

FARADAY CONSTANT

Set this parameter equal to the Faraday constant. For example, FARADAY CONSTANT=96485.3329 second Ampere mol-1 in SI units.

SPL REFERENCE PRESSURE

Set this parameter equal to the reference pressure used for computing the sound pressure level. For example, SPL REFERENCE PRESSURE=20 micropascals for air in SI units.

STEFAN BOLTZMANN

Set this parameter equal to the Stefan Boltzmann constant. For example, STEFAN BOLTZMANN=5.669 × 10−8 joule per sec m2 kelvin4 in SI units.

UNIVERSAL GAS CONSTANT

Set this parameter equal to the universal gas constant. For example, UNIVERSAL GAS CONSTANT=8.31434 joule per mole kelvin in SI units.

There are no data lines associated with this option.