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[FluidDynamicsApplication][FluidDynamicsHydraulicsApplication] Adding new hydraulic solver with fractional splitting approach #13031

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@uxuech uxuech commented Jan 23, 2025

📝 Description
In this PR, we introduce a new fractional-step hydraulic solver, independent of the previous hydraulic solver. The Navier-Stokes equations are solved using a new approach for two fluids to ensure conservation of mass and energy. Broadly speaking, without delving into the details of the formulation, part of the inertial term of the Navier-Stokes equations is solved first. This is why we introduce a new vector convection process. Subsequently, the free surface is convected, and finally, the remaining terms of the Navier-Stokes equations are resolved. This approach can be understood as a f_ractional splitting of the Navier-Stokes equations_.

Additionally, the mass source term is added only in the cut elements, with opposite signs in the air and water domains. This is why the term f has been slightly modified to remain consistent with the new formulation.

As a reminder, this PR is a continuation of PR #12960, aiming to integrate and complete the entire new two fluid NS formulation.

🆕 Changelog

@uxuech uxuech requested a review from a team as a code owner January 23, 2025 15:58
@uxuech uxuech requested a review from rubenzorrilla January 23, 2025 15:59
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