Hydrodynamic coupling between two fluid membranes
  The coupled in-plane diffusion dynamics between point-particles embedded in stacked fluid membranes are investigated. We calculate the contributions to the coupling longitudinal and transverse diffusion coefficients due to particle motion within the different as well as the same membranes. The stacked geometry leads to a hydrodynamic coupling between the two membranes. 
Sanoop Ramachandran and Shigeyuki Komura
cond-mat.soft