Modeling I
==============

It's the same modeling as C but with FORMULATION ='U_ PSI '.

Characteristics of modeling
-----------------------------------

Pressure-potential formulation :math:`(u,\psi )` on 'AXIS_FLUIDE' elements. The output impedance is defined by a AXIS_FLUI_ABSO model applied (option IMPE_MECA) to the GROUP_MA =' SORTIE '.

Boundary condition:

.. code-block:: text

    ONDE_FLUI: (GROUP_MA ='Entry', PRES =1.0)


Characteristics of the mesh
----------------------------


.. csv-table::

    "Number of knots:", "125"
    "Number of meshes and types:", "30 QUAD8"



Tested values
---------------


.. csv-table::

    "**Location**", "**Sizes**", "**Reference**", "**PRECISION**"
    ":math:`A` "," :math:`p` (real)
    :math:`p` (picture)", "0.5
    0.0", "1.0E-3"
    ":math:`B` "," :math:`p` (real)
    :math:`p` (picture)", "0.5
    0.0", "1.0E-3"
    ":math:`C` "," :math:`p` (real)
    :math:`p` (picture)", "—0.482466
    —0.131252", "1.0E-3"
    ":math:`D` "," :math:`p` (real)
    :math:`p` (picture)", "—0.482466
    —0.131252", "1.0E-3"