Methods and apparatus for dilational interfacial rheology

Abstract

The invention provides an interfacial dilational strain apparatus. The interfacial dilational strain apparatus may comprise a body having a first surface facing in a first radial direction wherein the first surface defines a channel having an opening facing in the first radial direction. The interfacial dilational strain apparatus may comprise a deformable wall sealingly attached to the body to cover the opening of the channel wherein the deformable wall and the channel define a cavity. The interfacial dilational strain apparatus may comprise one or more ports fluidly connected to the cavity. The deformable wall may be deformable in the first radial direction by increasing a fluid pressure or volume within the cavity. The deformable wall may be deformable in a second radial direction opposite the first radial direction by decreasing the fluid pressure or volume within the cavity.

Dependencies are inferred from the claim text.