Abstract
Developing centerline velocity and reattachment lengths were measured for viscoelastic polymer solutions in an abrupt 2-to-1 expansion. Test fluids were characterized for shear stress and first normal stress difference using a Weissenberg Rheogoniometer. The deviation from inelastic behavior is examined for 0.31⩽n⩽0.58, 2.7⩽Re⩽116.0 and 0⩽We⩽0.195. No deviation from inelastic behavior was observed for We⩽0.047, while significant predevelopment of the flow field relative to inelastic behavior was observed for 0.047⩽We⩽0.114. A flow instability was observed for We⩾0.12. The conditions for unstable flow are compared to the reversed contraction flow and to criteria suggested in the literature.
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.
