Abstract
A semi-empirical method is presented which permits the prediction of the entrance length and entrance pressure drop of laminar flow of non-Newtonian viscoelastic fluid into the entrance of a circular tube. The only information required for this calculation is the knowledge of pipe diameter, mean velocity, and rheological parameters of the fluid. In addition, data are presented concerning the laminar flow of aqueous solutions of ET-597, a Dow Chemical long-chain polymer, both in the entrance region and in the established zone. Data for laminar flow in the established zone indicate that the Fanning friction factor, f , and the generalized non-Newtonian Reynolds number, R', have the relationship f = 16/R'. Also, it is found that above a certain mean velocity, which is a function of polymer concentration and pipe diameter, the pressure losses become less for polymeric solutions than for water.
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.
