.. _U3.13.03:

**u3.13.03** 2D models_ FLUIDE, 2D_ FLUI_STRU, AXIS_FLUIDE, AXIS_FLUI_STRU
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**Summary:**

This document describes for 2D_ FLUIDE, 2D_, 2D_ FLUI_STRU, AXIS_FLUIDE, AXIS_FLUI_STRU models:


* the degrees of freedom carried by the finite elements that support modeling,


* the related support meshes,


* the loads supported,


* non-linear possibilities,


* test cases implementing the models.

The 2D_ FLUIDE (elements in a plane) and 2D_ FLUI_STRU (1D fluid-structure interaction elements) models correspond to the 2D formulation in linear hypothesis of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [:ref:`R4.02.01 <R4.02.01>`]. Currently, consideration of free surface is not developed.

The models AXIS_FLUIDE (elements in a plane) and AXIS_FLUI_STRU (1D elements of fluid-structure interaction) correspond to the formulation in axisymmetry in linear hypothesis of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [:ref:`R4.02.01 <R4.02.01>`]. Currently, consideration of free surface is not developed.


.. toctree::
    :hidden:

    self

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

    Discr_tisation
    Chargements_support_s
    Possibilit_s_non-lin_aires
    Exemples_de_mise_en__uvre___cas-tests