D modeling
==============


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

Method UPWIND without an auxiliary grid is used by PROPA_FISS.


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

The same mesh as that of modeling A. is used.


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

We extract the normal (:math:`\mathit{LSN}`) and tangent (:math:`\mathit{LST}`) level-set using the POST_RELEVE_T operator using the operator and we check that the maximum and minimum values remain within the radius of capture of the nodes tested around the crack front, i.e. 1/3:


.. csv-table::

    ":math:`\mathit{Propag.}i` "," :math:`\mathit{Max}{\mathit{LSN}}_{i}` "," :math:`\mathit{Min}{\mathit{LSN}}_{i}` "," "," :math:`\mathit{Max}{\mathit{LST}}_{i}` "," :math:`\mathit{Min}{\mathit{LST}}_{i}`"
    "3", "0.2", "-0.2", "-0.2", "-0.267", "-0.267"


The results obtained clearly show that the level-sets remain less than the radius in which the crack front was located. This means that the crack bottom has been correctly located using the upwind method.