*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:

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.