.. _V8.01.111:

**v8.01.111** FDLV111 - Absorption of a pressure wave in a fluid column
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**Summary:**

First order fluid paraxial elements intended to apply absorbent conditions at the border of a finite element mesh are tested to simulate infinity in direct transient calculations.

They are used to model an infinite fluid column, in 3D or 2D, in which a pressure wave is created using a piston. We are interested in the non-reflection of the wave at the "infinite" end of the column.

The two direct transient operators of*Code_Aster* are tested successively, namely DYNA_VIBRA and DYNA_NON_LINE.


.. toctree::
    :hidden:

    self

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

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A___cas_3D
    Mod_lisation_B___cas_2D
    Synth_se_des_r_sultats