opcsim.utils.k_kohler¶

opcsim.utils.k_kohler(diam_dry, kappa=0.0, rh=0.0)¶

Calculate the wet diameter of a particle based on the hygroscopic growth parameter, kappa (k-Kohler theory).

\[D_w=D_d*\sqrt[3]{1 + \frac{a_w}{1-a_w}\kappa_{eff}}\]

Parameters

diameter_dry: float: The dry diameter in any units (nm or um most likely)
kappa: float, optional: The effective kappa value
rh: float: optional: The relative humidity as a percentage (0.0-100.0)

Returns

diameter_wet: The wet diameter in the same units supplied for the dry diameter