2023
DOI: 10.1017/jfm.2023.151
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Maximum drag reduction state of viscoelastic turbulent channel flow: marginal inertial turbulence or elasto-inertial turbulence

Abstract: The essence of the maximum drag reduction (MDR) state of viscoelastic drag-reducing turbulence (DRT) is still under debate, which mainly holds two different types of views: the marginal state of inertial turbulence (IT) and elasto-inertial turbulence (EIT). To further promote its understanding, this paper conducts a large number of direct numerical simulations of DRT at a modest Reynolds number Re with $Re = 6000$ for the FENE-P model that covers a wide range of flow states and focu… Show more

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Cited by 6 publications
(4 citation statements)
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“…To further study the influence of the dispersed phase on the turbulence fluctuations, we show the Favre normal stresses (figure 3d-f ), which are generally investigated by the root mean square (r.m.s.) velocity fluctuations in the constant density flow system (Zhu et al 2016;Wang et al 2023b). For the two-phase flow with ξ ρ = 1 and ξ μ = 1, the normal stress modulation is not very significant and the profiles of the normal stresses almost coincide with those for the single-phase case.…”
Section: Resultsmentioning
confidence: 81%
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“…To further study the influence of the dispersed phase on the turbulence fluctuations, we show the Favre normal stresses (figure 3d-f ), which are generally investigated by the root mean square (r.m.s.) velocity fluctuations in the constant density flow system (Zhu et al 2016;Wang et al 2023b). For the two-phase flow with ξ ρ = 1 and ξ μ = 1, the normal stress modulation is not very significant and the profiles of the normal stresses almost coincide with those for the single-phase case.…”
Section: Resultsmentioning
confidence: 81%
“…the r.m.s. streamwise velocity fluctuations decrease near the wall but increase away from the wall (Min et al 2003;Wang et al 2023b). The normal stress ρu z u z A,t shows a stronger reduction, indicating that the Taylor vortex has been significantly weakened as indicated by the averaged radial-axial velocity vectors in figure 1.…”
Section: Resultsmentioning
confidence: 95%
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