Modeling A
==============


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


.. image:: images/100000000000052C0000034C282845AC72056625.png
    :width: 6.889in
    :height: 4.3909in


.. _RefImage_100000000000052C0000034C282845AC72056625.png:

Figure 2.1: Initial modeling mesh.

We start with a coarse mesh containing 250 knots.


Operations carried out
--------------------

The RAFF_GP command is used to refine the mesh downstream of the notch. Four stages of refinement are carried out.


.. image:: images/1000000000000522000003BF280BD1B1E81513EC.png
    :width: 6.3252in
    :height: 4.6161in


.. _RefImage_1000000000000522000003BF280BD1B1E81513EC.png:

Figure 2.2: Mesh obtained after 4 refinements.

The final mesh contains 8504 nodes.


Size tested and result
---------------------------

The number of nodes in the final mesh is tested in three areas more or less close to the bottom of the lens. It's a non-regression test.

The zones are as follows:

zone 1: disk of radius 0.04 centered at (0.58; 0.55), very close to the bottom of the notch

zone 2: disk with radius 0.04 centered at (0.77; 0.66), in the chip zone

zone 3: disk with radius 0.04 centered at (0.22; 0.76), outside the chip zone

The final mesh contains 8504 nodes.

.. csv-table::

    "**Identification**", "**Aster Reference**", "**Tolerance**"
    "Number of zone 1 nodes", "1241", "10"
    "Number of nodes zone 1", "306", "5"
    "Number of nodes zone 1", "7", "0"