coagulation_parameters

dustpy.std.dust.coagulation_parameters(sim)

Function calculates the coagulation parameters needed for a simple sticking-erosion-fragmentation collision model. The sticking matrix is calculated with the method described in appendices A.1. and A.2. of Brauer et al. (2008).

Parameters:

sim (Frame) – Parent simulation frame

Returns:

(cstick, cstick_ind, A, eps, klf, krm, phi) – Coagulation parameters

Return type:

Tuple

Notes

The sticking matrix has technically a shape of (Nm, Nm, Nm). For example: cstick(k, j, i) describes the change of mass bin k resulting from a sticking collision between particles j and k. Since this matrix has at maximum four entries per particle collision, only the non-zero elemts are stored in cstick of shape (4, Nm, Nm). The positions of the non-zero elements along the first axis are stored in cstick_ind. For details see Brauer et al. (2008).