.. _V7.32.123:

**v7.32.123** WTN123 - Appearance/disappearance of phase in a two-phase flow: Injection of gas around a gallery in a saturated domain
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**Summary:**

This test represents the simulation of gas injection into a geological environment. The aim is to model and simulate the appearance and evolution of a two-phase water/hydrogen flow in a porous medium initially saturated with pure water. We consider a :math:`\mathrm{2D}` situation where the effects of gravity are overlooked.

It is a purely hydraulic miscible calculation. The geometry shown corresponds to a square domain from which an area has been removed. The transfer terms are described by a model by Mualem Van-Genuchten. The problem is treated by the various schemes available for modeling two-phase flows: classical finite elements and Decentralized Edge Finite Volumes.

This test case is an extension in :math:`\mathrm{2D}` of the WTNP120 test case.


.. toctree::
    :hidden:

    self

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

    Probl_me_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Mod_lisation_C
    Synth_se_des_r_sultats