Ion drag force in dusty plasmas

A short review of different approaches to calculating the ion drag force is presented. First, a concise summary of the previously published results of the pair collision approach is given. Then, the recently proposed linear kinetic approach is discussed and generalized. The results of the two approaches are compared, and the importance of the self-consistent kinetic consideration is highlighted. In conclusion, the applicability of the approaches is analysed and unresolved issues are briefly discussed.