3.6. Syntax for ConfigJSON Files

Configuration JSON files are a CAPE-specific file using the JSON format to describe a surface mesh configuration. Its main goal is to define two things:

• Families of components, e.g. that "wings" includes "wing_left" and "wing_right"

• Component ID and other properties for each component.

There are two sections of the ConfigJSON file, which in CAPE is read and interfaced by the class cape.config.ConfigJSON. The first section is the "Tree" which defines families of components, and the second section is "Properties", which optionally can be used to define various properties for each component or family.

Here’s an example file:

{
    "Tree": {
        "entire": [
            "arrow_no_base",
            "base"
        ],
        "arrow_no_base": [
            "fuselage",
            "fins"
        ],
        "fuselage": [
            "cap",
            "body"
        ],
        "fins": [
            "fin1",
            "fin2",
            "fin3",
            "fin4"
        ]
    },
    "Properties": {
        "farfield": {
            "CompID": 1,
            "aflr3_bc": 1,
            "fun3d_bc": 5050
        },
        "entire": {
            "aflr3_bc": -1,
            "blds": 5.0e-4
        },
        "cap": {
            "CompID": 2
        },
        "body": {
            "CompID": 3
        },
        "fin1": {
            "CompID": 11
        },
        "fin2": {
            "CompID": 12
        },
        "fin3": {
            "CompID": 13
        },
        "fin4": {
            "CompID": 14
        },
        "base": {
            "CompID": 20
        }
    }
}