{
    "_doc": "Pinball config for legacy-compatible reproduction. Same as config_lbm_pinball.json but uses regularized inlet with NEQ damp=1.0 to match legacy NBB (f = feq_target + (f_neb - feq_neb)).",
    "grid": {
        "lattice_model": "D2Q9",
        "nx": 1280,
        "ny": 512,
        "nz": 1
    },
    "physics": {
        "data_type": "FP32",
        "viscosity": 0.004,
        "velocity": 0.01,
        "rho": 1.0
    },
    "method": {
        "collision": "MRT",
        "streaming": "double_buffer",
        "store_precision": "FP32",
        "ddf_shifting": false,
        "les": {
            "enabled": false,
            "cs": 0.16,
            "closed_form": true
        },
        "trt": {
            "magic_param": 0.1875
        },
        "inlet": {
            "profile": "parabolic",
            "scheme": "regularized",
            "regularized_neq_damp": 1.0
        },
        "outlet": {
            "mode": "neq_extrap",
            "backflow_clamp": true,
            "blend_alpha": 0.7,
            "srt_neq_damp": 0.5
        },
        "y_wall_bc": "bounce_back",
        "omega_guard": {
            "min": 0.01,
            "max": 1.99
        }
    },
    "cuda": {
        "threads_per_block": 256,
        "compute_capability": "auto"
    }
}