Discretization
==============


Degrees of freedom
------------------

.. csv-table::
 :header: Finite element, Degrees of freedom (at each vertex node)

    ACOU\ _... (3D), PRES: pressure
    ACOU_FACE... (3D), PRES: pressure
    ACPL... (PLAN), PRES: pressure


Support mesh for stiffness matrices
---------------------------------------

.. csv-table::
 :header: Modeling, Mesh, Finite element, Notes

    3D, TETRA4, ACOU_TETRA4,
        , TETRA10, ACOU_TETRA10,
        , PENTA6, ACOU_PENTA6,
        , PENTA15, ACOU_PENTA15,
        , HEXA8, ACOU_HEXA8,
        , HEXA20, ACOU_HEXA20,
        , HEXA27, ACOU_HEXA27,
    PLAN, TRIA3, ACPLTR3,
        , TRIA6, ACPLTR6,
        , QUAD4, ACPLQU4,
        , QUAD8, ACPLQU8,
        , QUAD9, ACPLQU9,


Cargo support mesh
------------------------------

.. csv-table::
 :header: Modeling, Mesh, Finite element, Notes

    3D, TRIA3, ACOU_FACE3,
        , TRIA6, ACOU_FACE6,
        , QUAD4, ACOU_FACE4,
        , QUAD8, ACOU_FACE8,
        , QUAD9, ACOU_FACE9,
    PLAN, SEG2, ACPLSE2,
        , SEG3, ACPLSE3,