Langmuir 2005, 21, 8243-8249 8243 The "Wimple": Rippled Deformation of a Fluid Drop Caused by Hydrodynamic and Surface Forces during Thin Film Drainage Lucy Y. Clasohm,, Jason N. Connor,,| ... In Final Form: June 16, 2005 It is well-known that hydrodynamic pressures in a thin draining liquid film can cause inversion of the curvature of a drop or bubble surface as it approaches another surface, creating a so-called "dimple". ... WimplesRippled Deformation of a Fluid Drop Langmuir, Vol. ...