This paper presents the results of experimental studies of the flow of a dilute polymer solution in a converging pipe. Three geometries with restriction rates are considered: 2.41, 3.92, and 5.65. A water–glycerin solution of 0.1% polyacrylamide was used as a working fluid. Point velocity measurements are made by using the smoke image velocimetry technique, which previously was proved by the construction of velocity profiles corresponding to the laminar viscoelastic flow in a straight pipe. The influence of the Weissenberg number and the restriction rate of the channel on the velocity profiles are established for both transverse and longitudinal directions. For small Weissenberg numbers, the experimental results are compared with the numerical results obtained using the Giesekus and exponential form of Phan-Thien–Tanner rheological models. Three flow regimes are identified: flow without vortex, vortex enhancement, and divergent flow, which is consistent with published results on the abrupt contraction and converging flows. Vortex length for a wide range of Weissenberg numbers is well predicted by a logarithm function. Modified expression of stretch rate with location of detachment plane can predict the flow regimes and the onset of unsteady flow in converging channels.
Skip Nav Destination
Article navigation
March 2024
Research Article|
March 07 2024
Some experimental results for converging flow of dilute polymer solution
Special Collection:
Tanner: 90 Years of Rheology
Aidar Kadyirov (Айдар Кадыйров)
;
Aidar Kadyirov (Айдар Кадыйров)
a)
(Conceptualization, Investigation, Methodology, Writing – original draft, Writing – review & editing)
Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences
, POB 261, Kazan 420111, Russia
a)Author to whom correspondence should be addressed: aidarik@rambler.ru
Search for other works by this author on:
Rinat Zaripov (Ринат Зарипов)
;
Rinat Zaripov (Ринат Зарипов)
(Investigation, Visualization)
Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences
, POB 261, Kazan 420111, Russia
Search for other works by this author on:
Danila Makarushkin (Данила Макарушкин)
Danila Makarushkin (Данила Макарушкин)
(Data curation, Validation, Visualization)
Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences
, POB 261, Kazan 420111, Russia
Search for other works by this author on:
a)Author to whom correspondence should be addressed: aidarik@rambler.ru
Physics of Fluids 36, 033110 (2024)
Article history
Received:
November 24 2023
Accepted:
February 17 2024
Citation
Aidar Kadyirov, Rinat Zaripov, Danila Makarushkin; Some experimental results for converging flow of dilute polymer solution. Physics of Fluids 1 March 2024; 36 (3): 033110. https://doi.org/10.1063/5.0188856
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
On Oreology, the fracture and flow of “milk's favorite cookie®”
Crystal E. Owens, Max R. Fan (范瑞), et al.
Fluid–structure interaction on vibrating square prisms considering interference effects
Zengshun Chen (陈增顺), 陈增顺, et al.
A unified theory for bubble dynamics
A-Man Zhang (张阿漫), 张阿漫, et al.
Related Content
Predicting the pumping capability of single-screw extruders: A comparison of two- and three-dimensional modeling approaches
AIP Conf. Proc. (May 2023)
Behavior of a stationary jet of concentrated polyacrylonitrile solution
Physics of Fluids (August 2024)
Two-relaxation-time lattice Boltzmann model of the velocity profiles and volumetric flow rate of generalized Newtonian fluids in a single-screw extruder
AIP Advances (January 2024)
Tanner: 90 years of Rheology
Physics of Fluids (November 2024)
Simulation of fluid flow in the pore space of the core obtained by x-ray microtomography
AIP Conf. Proc. (November 2019)