Reynolds-Averaged Simulation of Drag Reduction in Viscoelastic Pipe Flow with a Fixed Mass Flow Rate
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Published:2023-03-23
Issue:4
Volume:11
Page:685
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ISSN:2077-1312
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Container-title:Journal of Marine Science and Engineering
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language:en
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Short-container-title:JMSE
Author:
Li Zhuoyue1,
Hu Haibao1,
Du Peng1ORCID,
Xie Luo1,
Wen Jun1,
Chen Xiaopeng1
Affiliation:
1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
Abstract
A high molecular polymer solution with viscoelasticity has the effect of reducing frictional drag, which is quite practical for energy saving. Effective simulations of viscoelastic flows in a pipeline with a high Reynolds number is realized by incorporating the constitutive equation of viscoelasticity into the k−ε−v′2¯−f turbulence model. The Finitely Extensive Nonlinear Elastic Peterlin (FENE-P) model is employed for characterizing the viscoelasticity. The drag reduction of fully developed viscoelastic pipe flow with a fixed mass flow rate is studied. Different from increasing the center velocity and without changing the velocity near the wall at a fixed pressure drop rate, the addition of a polymer reduces the velocity near the wall and increases the velocity at the center of the pipe and makes the flow tend to be a laminar flow. Decreasing the solvent viscosity ratio or increasing the maximum extensibility or the Weissenberg number can effectively reduce the turbulence intensity and the wall friction. Under the premise of ensuring calculation accuracy, this Reynolds-averaged simulation method for viscoelastic flow has significant advantages in both computational cost and accuracy, which is promising for drag reduction simulation and practical engineering applications.
Funder
National Natural Science Foundation of China
Natural Science Basic Research Program of Shaanxi
China Postdoctoral Science Foundation
Natural Science Foundation of Chongqing
Subject
Ocean Engineering,Water Science and Technology,Civil and Structural Engineering