Plonk example: multi-species dust-gas protoplanetary disc using mixture method

Phantom snapshot of a dust and gas protoplanetary disc with multiple dust species using the mixture method and an embedded planet. From simulations run by Benedetta Veronesi. See Veronesi B., Ragusa E., Lodato G., Aly H., Pinte C., Price D. J., Long F., et al., 2020, MNRAS, 495, 1913.