{
    "grids": {
        "default": {
            "operators": {
                "xi": "upwind9",
                "eta": "upwind9"
            }
        },
        "grid0": {
            "x": "linspace:-5:0:50",
            "y": "linspace:0:5:50",
            "boundary_conditions": {
                "south": "grid1",
                "north": "grid1",
                "east": "grid3",
                "west": "grid3"
            }
        },
        "grid1": {
            "x": "linspace:-5:0:50",
            "y": "linspace:-5:0:50",
            "boundary_conditions": {
                "south": "grid0",
                "north": "grid0",
                "east": "grid2",
                "west": "grid2"
            }
        },
        "grid2": {
            "x": "linspace:0:5:50",
            "y": "linspace:-5:0:50",
            "boundary_conditions": {
                "south": "grid3",
                "north": "grid3",
                "east": "grid1",
                "west": "grid1"
            }
        },
        "grid3": {
            "x": "linspace:0:5:50",
            "y": "linspace:0:5:50",
            "boundary_conditions": {
                "south": "grid2",
                "north": "grid2",
                "east": "grid0",
                "west": "grid0"
            }
        }
    },
    "integration_time": 2.0,
    "vortex": {
        "x0": -1.0,
        "y0": 0.0,
        "mach": 0.5,
        "rstar": 0.5,
        "eps": 1.0
    }
}