Abstract
Micro-electrodes made of platinum have been used to measure the local shear rate on the surface of a cylinder (length-to-diameter ratio of 11–12) exposed to the fully developed laminar flow of power-law fluids in a vertical pipe. Two Newtonian and two shear-thinning solutions are used as model test fluids to ascertain the influence of shear-thinning viscosity on the distribution of shear rate on the surface of the cylinder. The results reported herein encompass a wide range of Reynolds numbers 0.16⩽Re⩽75 based on the cylinder diameter and centreline velocity. Over the range of conditions, it is observed that the shear rate is a maximum at about θ=130° and it tends to be higher in shear-thinning fluids than that in Newtonian fluids otherwise under identical conditions.
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.
