.. _U3.14.02:

**u3.14.02** 3D models_ FLUIDE, FLUI_STRU, 2D_ FLUI_PESA
==============================================================

**Summary:**

This document describes for 3D models_ FLUIDE, FLUI_STRU, 2D_ FLUI_PESA:


* 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 3D_ FLUIDE (volume elements) and FLUI_STRU (2D fluid-structure interaction elements) models correspond to the linear formulation of the coupled problem allowing the study of the vibratory behavior of a structure in the presence of a non-viscous, compressible fluid [:ref:`R4.04.01 <R4.04.01>`]. The free surface is taken into account by 2D_ FLUI_PESA modeling (surface elements).


.. toctree::
    :hidden:

    self

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

    Discr_tisation
    Chargements_support_s
    Possibilit_s_non-lin_aires
    Exemple_de_mise_en__uvre___cas-tests