Modules

Per-block discretization descriptor for the 1D solver.

Boundary condition enforcement for the 1D Euler solver.

Checkpoint write and read for the 1D Euler solver (MPI-correct),

Dimension-blind checkpoint machinery: unified format, pointer files,

2D Euler solver configuration: derived type, namelist loader, validation.

Dimension-blind configuration engine: field descriptors + generic

Runtime-queryable schema and typed accessors for config_2d_t.

Phase G: rank-0 dispatch loop + peer command loop for the

Pure 2D block decomposition of the Cartesian grid across an MPI process grid.

1D Euler file-based solve driver (extracted from app/euler_1d).

Euler equation physics: flux function, flux splitting, and eigensystem.

4-component 2D Euler face fluxes (Rusanov, HLLC) with face-normal rotation.

Two-axis non-blocking halo exchange for the 2D block decomposition.

Initial-condition setup for all supported problem types.

Linear (optimal-weight) WENO reconstruction for the smooth hybrid path.

1D grid metric layer: node coordinates and the dx/dξ Jacobian.

MP5 (Monotonicity-Preserving 5th-order) reconstruction (Suresh & Huynh 1997).

Process-global MPI lifecycle and identity queries.

Canonical string tokens for runtime-selectable solver options.

Parse a space/comma-separated output_format list and derive per-format

Case-relative path resolution for file-valued namelist parameters.

Working precision and common constants for the solver.

Reconstruction scheme initialisation for the 1D Euler solver.

Dimension-blind bounded-step run loop (Q2c, spec §7).

Gather a per-rank primitives slice into a rank-0-owned global

Abstract procedure interfaces shared by reconstruction and flux modules.

Polling-friendly 2D solver runtime (Full 2D Parity phase P1).

Solver instance state for the 1D Euler solver.

Spatial residual computation via flux splitting and reconstruction.

Dimension-blind explicit Runge-Kutta stepper kernels (R2, spec §5).

Dimension-agnostic Tecplot writers. ASCII (ordered POINT zone) and

Time integration schemes for method-of-lines ODE systems.

Wall-clock timer module for performance profiling.

Second-order upwind reconstruction scheme.

WENO11-JS finite-difference reconstruction scheme.

WENO5-Z (Borges et al. 2008) reconstruction scheme.

WENO9-JS finite-difference reconstruction scheme.

Shared infrastructure for WENO-family reconstruction schemes.