LDA measurements of steady streaming flows of Newtonian and viscoelastic fluids

✍ Scribed by D. Vlassopoulos; W. R. Schowalter

• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 691 KB
• Volume: 20
• Category: Article
• ISSN: 0723-4864
• DOI: 10.1007/bf00190594

✦ Synopsis

LDA experiments have been conducted in a twodimensional steady streaming flow field in order to determine the secondary velocity profiles. We describe here an LDA system developed to resolve small secondary-flow velocities and to detect flow reversals due to viscoelasticity. Results compare well with theoretical predictions. A detailed analysis of the errors and uncertainties involved in the measurements confirms the reliability and reproducibility of the measurements. Although the method has been applied here to a specific flow field, the technique should be applicable to a number of secondary flows, such as those which can occur in curved pipes and in oscillating pipe flows.