https://github.com/sedfoam/sedfoam/blob/master/solver/interfacialModels/dragModels/GidaspowSchillerNaumann/GidaspowSchillerNaumann.H file

Classes

class Foam::GidaspowSchillerNaumann

H, Enwald, E. Peirano, A-E Almstedt 'Eulerian Two-Phase Flow Theory Applied to Fluidization' Int. J. Multiphase Flow, Vol. 22, Suppl, pp. 21-66 (1996) Eq. 86-87, p. 40.