Abstract
The steady tubeless-siphon (Fano) flow of 0.5% Dow Separan AP-30 in glycerine was experimentally studied. It was found that the inertial effects were generally not negligible, resulting in bulging and contraction of the column according to Coleman and Noll's predictions for the extension of a circular cylinder. In an attempt to develop a free-boundary isochoric simple extensional flow which does not have a surface geometry modification as a result of inertial effects, a general unsteady accelerating D'Almbert-type flow is investigated. It is shown that for the Coleman-and-Noll-type extension of a (perpetually) circular cylinder, a specific D'Almbert motion exists which does not have inertial induced surface-geometry changes. However, no D'Almbert-type Fano flow exists which meets this criterion. The interpretation of extensional viscosity is also discussed for these flows.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
