{
    "grids": {
        "grid": {
            "operators": {
                "xi": "upwind9h2",
                "eta": "upwind9h2"
            },
            "x": { "linspace": { "start": 0, "end": 2, "steps": 50, "h2": true } },
            "y": { "linspace": { "start": 0, "end": 2, "steps": 50, "h2": true } },
            "boundary_conditions": {
                "east": "this",
                "west": "this",
                "north": "this",
                "south": "this"
            }
        }
    },
    "integration_time": 4.0,
    "initial_conditions": {
        "expressions": {
            "globals": "u0=1; v0=-0.5; p0=1.0;",
            "rho": "1 + 0.2*math::sin(PI*((x+t*u0) + (y + t*v0))) ",
            "u": "u0",
            "v": "v0",
            "p": "p0"
        }
    },
    "gamma": 1.4
}