Abstract
When a sphere approaches a flat surface which is covered by a fluid film, under certain conditions, a pool of fluid becomes entrapped in the contact region. A study of this phenomena is described in which optical interference is used. High speed photography is employed at framing rates up to 5,000 per second, with a gas laser as the light source.
Notes
Paper presented at the Spring Meeting of the Association for High Speed Photo Photography on 31 March 1969 in London.