B modeling
==============


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

The modeling tested is 3D. We use the symmetries of the problem to represent only one sixteenth of the sphere.


.. image:: images/10000000000001F40000026CEC440C4794955818.png
    :width: 3.1492in
    :height: 3.9055in


.. _RefImage_10000000000001F40000026CEC440C4794955818.png:

**Figure** 4.1-a **: geometry of the structure — 3D model**


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

The model is 3D and includes 4905 HEXA8.


Tested sizes and results
------------------------------

To validate the solution obtained, the pilot parameter is tested at the last moment, which should be equal to the pressure obtained by the formula given in §2.


.. csv-table::

    "**Value tested**", "**Instant**", "**Reference**", "**Type**", "**Variance**"
    "Control parameter", "20.0", "415.89", "Analytics", "1.6%"
    "", "20.0", "422.4168347", "Non-regression", ":math:`1.0\mathrm{\times }{10}^{\mathrm{-}8}\text{\%}`"