.. _V7.31.112:

**v7.31.112** WTNV112 — Gravity flow in an unsaturated porous medium
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**Summary:**

The hydraulic behavior of an unsaturated porous medium is studied. Five models are carried out: one is three-dimensional (modeling B) and the other four are two-dimensional (models A, C, D, E)

This test consists in studying the influence of a gravity flow on the distribution of the pressure of fluids (liquid and gas) in the unsaturated medium.

The models studied are :math:`\mathrm{2D}` planes (DPQ8 and DPTR6) and :math:`\mathrm{3D}` volume HEXA20 with linear behavior, this is an evolutionary problem.

The reference solution is one-dimensional because it only depends on the vertical coordinate.


.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Mod_lisation_C
    Mod_lisation_D
    Mod_lisation_E
    Synth_se_des_r_sultats