*PHYSICAL CONSTANTS
Keywords: ccx

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*PHYSICAL CONSTANTS

Keyword type: model definition

This keyword is used to define the Stefan-Boltzmann constant, absolute zero temperature and the universal gravitational constant in the user's units. The first two constants are required for radiation type boundary conditions. They are defined by the two parameters ABSOLUTE ZERO and STEFAN BOLTZMANN. The universal gravitational constant is required for general gravitational loading, e.g. for the calculation of orbits and is defined by the parameter NEWTON GRAVITATION.

First line:

- *PHYSICAL CONSTANTS

    Example:

    *PHYSICAL CONSTANTS, ABSOLUTE ZERO=0, STEFAN BOLTZMANN=5.669E-8

for time in s, length in m, mass in kg and temperature in K (unit of the Stefan-Boltzmann constant: W m K.

    Example:

    *PHYSICAL CONSTANTS, NEWTON GRAVITY=6.67E-11

for time in s, length in m, mass in kg and temperature in K (unit of the universal gravitational constant: N m kg).

Example files: beamhtbf, oneel20cf, cubenewt.