CDM/tests/Case_B.json at main · SprayDriftModels/CDM · GitHub

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{
    "Case_B": {
        "dropletSizeDistribution": [                  // μm, cumulative volume fraction
            [ 18,  4.772e-05 ],
            [ 22,  1.185e-03 ],
            [ 26,  2.874e-03 ],
            [ 30,  4.877e-03 ],
            [ 36,  8.392e-03 ],
            [ 44,  1.423e-02 ],
            [ 52,  2.166e-02 ],
            [ 62,  3.351e-02 ],
            [ 74,  5.180e-02 ],
            [ 86,  7.467e-02 ],
            [ 100, 1.067e-01 ],
            [ 120, 1.611e-01 ],
            [ 150, 2.553e-01 ],
            [ 180, 3.555e-01 ],
            [ 210, 4.540e-01 ],
            [ 250, 5.742e-01 ],
            [ 300, 6.992e-01 ],
            [ 360, 8.106e-01 ],
            [ 410, 8.758e-01 ],
            [ 500, 9.472e-01 ],
            [ 600, 9.837e-01 ],
            [ 720, 9.983e-01 ],
            [ 860, 1.000e+00 ]
        ],
        "dryAirTemperature": 16.6,                    // Dry air temperature [°C]
        "barometricPressure": 101325,                 // Barometric pressure [Pa]
        "relativeHumidity": 67.1,                     // Relative humidity [percent]
        "windVelocityProfile": {
            "velocityMeasurements": [                 // Elevation [m], Velocity [m/s]
                [ 2.0, 2.436272531 ]
            ],
            "temperatureMeasurements": [],            // Elevation [m], Temperature [°C]
            "horizontalVariation": 10.7,              // Horizontal variation in wind direction around mean (ψψψ) [degrees]
            "horizontalVariationMethod": 0            // Calculation method for ψψψ: 0=Entered, 1=Interpolate, 2=SDTF
        },
        "dropletTransport": {
            "nozzleHeight": 0.8016,                   // Height of nozzle above ground [m]
            "canopyHeight": 0.15,                     // Canopy height [m]
            "nozzlePressure": 250000.0,               // Nozzle pressure [Pa]
            "nozzleAngle": 110.0,                     // Nozzle angle [degrees]
            "waterDensity": 1.0,                      // Density of pure water in droplet [g/cm³]
            "solidsDensity": 1.6,                     // Density of dissolved solids in droplet [g/cm³]
            "solidsFraction": 0.0079761,              // Mass fraction dissolved solids in solution
            "ddd": 60                                 // Optional: scale factor for maximum deposition time (δδδ), ≥1
        },
        "deposition": {
            "dsdCurveFitting": true,                  // Enable curve fitting for DSD by non-linear least squares. If disabled, finite difference approximation is used.
            "applicationRate": 0.83886,               // Intended application rate [kg/ha]
            "concentrationAI": 0.0079761,             // Concentration in tank solution, wt. fraction
            "downwindFieldDepth": 24.0,               // Downwind field depth [m]
            "crosswindFieldDepth": 72.0,              // Crosswind field width [m]
            "nozzleSpacing": 0.5,                     // Space between nozzles on boom [m]
            "minDropletSize": 17.831,                 // Minimum droplet size for deposition [μm]
            "maxDropletSize": 600.0,                  // Maximum droplet size for deposition [μm]
            "maxDriftDistance": 60.96,                // Optional: Maximum drift distance for deposition (Lmax) [m], or null
            "lambda": 4,                              // Optional: scale factor for number of drift segments (λ), ≥1, default 1
            "outputInterval": 0.6096                  // Optional: distance interval for deposition output (Δx) [m], default 0.5
        },
        "integrationOptions": {
            "relativeTolerance": 1e-5,                // Optional, Advanced: Relative error tolerance, ≥1e-3 recommended, default 1e-6
            "absoluteTolerances": [                   // Optional, Advanced: Absolute error tolerances for solution vector components: Z, X, Vz, Vx, Mw, Vvwx
                1e-8, 1e-8, 1e-8, 1e-8, 1e-10, 1e-8
            ],
            "maxOrder": 5,                            // Optional, Advanced: Maximum order for BDF method, ≥1, default 5
            "maxSteps": 2000,                         // Optional, Advanced: Maximum number of internal steps per output step, ≥1, default 500
            "stabilityLimitDetection": false,         // Optional, Advanced: Enable BDF stability limit detection algorithm, default false
            "maxErrorTestFailures": 10,               // Optional, Advanced: Maximum number of error test failures permitted per output step, ≥1, default 7
            "maxNonlinearIterations": 3,              // Optional, Advanced: Maximum number of nonlinear solver iterations per output step, ≥1, default 3
            "maxConvergenceFailures": 20,             // Optional, Advanced: Maximum number of nonlinear solver convergence failures per output step, ≥1, default 10
            "convergenceCoefficient": 0.1             // Optional, Advanced: Safety factor for nonlinear solver convergence test, >0, default 0.1
        },
        "experimentalOptions": {
            "enableStreamlines": [                    // Optional, Advanced: Enable processing of selected streamlines for deposition
                true,                                 // -40°
                true,                                 // -50°
                true,                                 // -60°
                true,                                 // -70°
                true,                                 // -80°
                true,                                 // -90°
                true,                                 // -100°
                true,                                 // -110°
                true,                                 // -120°
                true,                                 // -130°
                true                                  // -140°
            ]
        }
    }
}