Reynolds-Averaged Simulation of Drag Reduction in Viscoelastic Pipe Flow with a Fixed Mass Flow Rate

A high molecular polymer solution with viscoelasticity has the effect of reducing frictional drag, which is quite practical for energy saving. Effective simulations viscoelastic flows in a pipeline Reynolds number realized by incorporating constitutive equation into k−ε−v′2¯−f turbulence model. The Finitely Extensive Nonlinear Elastic Peterlin (FENE-P) model employed characterizing viscoelasticity. drag reduction fully developed pipe flow fixed mass rate studied. Different from increasing center velocity and without changing near wall at pressure drop rate, addition reduces increases makes tend to be laminar flow. Decreasing solvent viscosity ratio or maximum extensibility Weissenberg can effectively reduce intensity friction. Under premise ensuring calculation accuracy, this Reynolds-averaged simulation method significant advantages both computational cost promising engineering applications.