Refactor fluid simulation code for clarity

[aabrown100-git]

Refactor fluid assembly code to unify 2D/3D functions and improve readability.

This PR consolidates the fluid_2d_c/m and fluid_3d_c/m functions into unified fluid_unified_c and fluid_unified_m functions, reducing code duplication by approximately 1,000 lines. It introduces smaller, focused helper functions (e.g., interpolate_fields, compute_strain_rate_tensor, compute_viscosity_terms) that map directly to specific equation terms, enhancing readability, maintainability, and alignment with the referenced VOF paper. The original functions are retained as wrappers for backward compatibility.

---

 

[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
_{Learn more about Cursor Agents}

[aabrown100-git]

@cursoragent The code is not compiling. Fix this. If it compiles, come back and check if the Tests pass. If they don't pass, figure out why and fix it.

[cursor]

I refactored parts of the fluid solver by introducing forward declarations for unified fluid functions and modifying an interpolation routine to allow direct data manipulation and support mesh movement. I also added a necessary header for low-level memory operations.

• I added forward declarations for fluid_unified_c and fluid_unified_m in Code/Source/solver/fluid.cpp. This prepares the codebase for a new unified fluid solver implementation.
• I modified the signature of fluid_assembly::interpolate_fields in Code/Source/solver/fluid.cpp. The FluidData parameter is now passed by non-const reference, and a new bool mvMsh parameter was added, allowing the function to directly modify fluid data and handle mesh movement.
• I included the <cstring> header in Code/Source/solver/Vector.h, likely to enable the use of memory manipulation functions.

---

 

_{Learn more about Cursor Agents}