{
  "benchmark": {
    "citation": "Zhang et al. 2023, Entropy 25(1):179",
    "doi": "10.3390/e25010179",
    "case": "rectangular-section supersonic air eductor, W_c = 10 mm"
  },
  "geometry_mm": {
    "H_t_nozzle_throat": 1.0,
    "H_a_nozzle_outlet": 3.2,
    "H_e_nozzle_inlet": 14.0,
    "H_m_mixing_inlet": 34.0,
    "H_c_constant_area": 4.6,
    "L_c_constant_area": 42.0,
    "H_o_diffuser_outlet": 22.3,
    "L_n_throat": 2.0,
    "L_t_nozzle_to_CA": 3.0,
    "W_c_section_width": 10.0,
    "theta0_nozzle_divergent_deg": 32,
    "theta1_mixing_convergent_deg": 72,
    "theta2_diffuser_deg": 20
  },
  "operating": {
    "P_primary_kPa": 400,
    "P_secondary_kPa": 100,
    "T_all_K": 293,
    "fluid": "air, ideal compressible gas",
    "walls": "no-slip adiabatic"
  },
  "derived": {
    "nozzle_area_ratio": 3.2,
    "design_exit_Mach": 2.706,
    "NPR": 4.0,
    "choking_NPR_threshold": 1.893,
    "choked": true,
    "nozzle_exit_static_kPa": 17.03,
    "regime": "strongly over-expanded (17 kPa vs 100 kPa secondary)",
    "throat_Re_Dh": 109500.0,
    "ideal_choked_mdot_g_s": 9.4443,
    "mdot_at_Cd_0.98_g_s": 9.2554,
    "target_secondary_at_ER_0.65_g_s": 6.139
  },
  "numerics": {
    "solver": "rhoSimpleFoam (steady, transonic yes)",
    "turbulence": "kOmegaSST RAS",
    "wall_treatment": "resolved, y+ ~ 3 target",
    "cells": 410400,
    "ranks": 24,
    "cells_per_rank": 17100,
    "fileHandler": "collated"
  },
  "mesh_quality": {
    "cells": 410400,
    "points": 439719,
    "faces": 1260080,
    "max_aspect_ratio": 43.671694,
    "max_skewness": 1.8137441,
    "max_non_orthogonality_deg": 35.905968,
    "avg_non_orthogonality_deg": 7.4663292,
    "min_cell_volume_m3": 1.2719698e-12,
    "negative_volumes": false,
    "failed_checks": [
      "Cells with small determinant (<0.001): 4642 (1.13%)"
    ],
    "user_accepted": true
  },
  "status": "NOT CONVERGED - solver diverges within 5 iterations; no engineering result produced"
}