.. _R5.02.02:

**r5.02.02** Nonlinear thermal
===================================

**Summary**

The operator THER_NON_LINE [:ref:`U4.54.02 <U4.54.02>`] makes it possible to solve transient heat problems in solids in the presence of non-linearities in material properties (heat capacity and conductivity), or boundary conditions (radiation-type heat exchange). The formulation and the algorithm used are presented here, the latter being close to that linked to the operator STAT_NON_LINE [:external:ref:`R5.03.01 <R5.03.01>`]. The various calculation options required have been presented in the plane, axisymmetric, and three-dimensional structural elements [:external:ref:`U3.22.01 <U3.22.01>`], [:ref:`U3.23.01 <U3.23.01>`], and [:external:ref:`U3.24.01 <U3.24.01>`].




.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Expression_de_l__quation_de_la_chaleur_en_thermique_non_lin_aire
    Conditions_aux_limites__chargement_et_condition_initiale
    Formulation_variationnelle_du_probl_me
    Discr_tisation_en_temps_de_l__quation_diff_rentielle
    Discr_tisation_spatiale_et_adaptation_de_l_algorithme_de_Newton_au_probl_me
    Principales_options_de_thermique_non-lin_aire_calcul_es_dans_Code_Aster
    Bibliographie