.. _over_constrained_volumes_page:

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Over-constrained volumes
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This mesh quality control highlights volumes sharing only one border with other volumes.
In other words, the volumes having all their nodes on the external border of the mesh are highlighted.

.. note::
	The highlighted volumes are actually over-constrained only if, at the computation time, the boundary conditions on the borders where the nodes are located are all Dirichlet boundary conditions.

.. image:: ../images/over_constrained_volumes.png
	:align: center

.. centered::
	Over-constrained volume is displayed in red.

**See Also** a sample TUI Script of a :ref:`tui_over_constrained_volumes` filter.  
