1. But

Solving a linear thermal problem in a steady or evolving regime.

Thermal loading is defined by the EXCIT keyword.

The time discretization is provided by the list of moments defined under the keyword LIST_INST. This evolutionary calculation can be initialized, at the first moment, in three different ways (keyword ETAT_INIT):

• at a constant temperature,

• by a temperature field, defined in advance, or extracted from a previous calculation,

• by a preliminary stationary calculation.

The concept produced by this operator is of the evol_ther type.