An improved <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si58.svg"><mml:mrow><mml:mi>k</mml:mi><mml:mo linebreak="badbreak">-</mml:mo><mml:mi>ω</mml:mi></mml:mrow></mml:math> turbulence model for FENE-P fluids without friction velocity dependence

An improved k-ω turbulence model for viscoelastic fluids is developed to predict turbulent flows, with polymeric solutions described by the finitely extensible nonlinear elastic-Peterlin constitutive model. The tested against a wide range of direct numerical simulation data in fully-developed channel flow, different rheological parameter combinations, and can all regimes drag reduction (low, intermediate high) good performance. Closures are NLTij term, which captures polymer extension due fluctuations; modified damping function, fμ, accounts kinetic energy redistribution process; destruction Eτp. main advantage current its ability flow features simplicity without need friction velocity dependence, important flows reattachment their singularity caused stagnation points.