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Direct Numerical Simulation of the Viscoelastic Channel Flow Using Giesekus Model with Variable Parameters

  • Wei-guo Gu (顾卫国)
  • Yu Li (李钰)
  • De-zhong Wang (王德忠)
Article

Abstract

The paper performs a direct numerical simulation for the drag-reducing channel flow using Giesekus model with variable parameters. It is assumed that the relaxation time in the constitutive equation is varied depending on the local shear rate. The maximal drag reduction rate is obtained when variable parameters are applied in Giesekus model at high Weissenberg number. The Reynolds shear stress is reduced when Weissenberg number increases. In this case, the turbulence generation and transportation are further weakened and increasingly approaches to that in experiments.

Key words

Viscoelastic Fluid Giesekus Model DNS Variable Parameters 

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Supplementary material

42241_2018_144_MOESM1_ESM.docx (15 kb)
Direct Numerical Simulation of the Viscoelastic Channel Flow Using Giesekus Model with Variable Parameters

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Copyright information

© China Ship Scientific Research Center 2018

Authors and Affiliations

  • Wei-guo Gu (顾卫国)
    • 1
  • Yu Li (李钰)
    • 1
  • De-zhong Wang (王德忠)
    • 1
  1. 1.School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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