Fluid detachment and slip in extensional flows

T. Sridhar, R. K. Gupta

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)

Abstract

It is shown that under certain conditions it is possible to pull a fluid, flowing in a tube, away from the wall. The breakdown of adhesion as a result of the application of extensional deformation is demonstrated and the critical stress is measured. The experiments show that detachment takes place when the apparent extensional viscosity of the liquid near the solid surface reaches a critical value. The critical extensional viscosity depends only on the solution rheology and the material the tube is contructed of. This work shows the necessity of considering both shearing and extensional deformation when analysing slip in polymer processing operations.

Original languageEnglish
Pages (from-to)285-302
Number of pages18
JournalJournal of Non-Newtonian Fluid Mechanics
Volume30
Issue number2-3
DOIs
Publication statusPublished - 1 Jan 1988

Cite this