article published yes Yves Dubief author Vincent E. Terrapon author Björn Hof author 3A374330-F248-11E8-B48F-1D18A9856A870000-0003-2057-2754 BjHo department The dissolution of minute concentration of polymers in wall-bounded flows is well-known for its unparalleled ability to reduce turbulent friction drag. Another phenomenon, elasto-inertial turbulence (EIT), has been far less studied even though elastic instabilities have already been observed in dilute polymer solutions before the discovery of polymer drag reduction. EIT is a chaotic state driven by polymer dynamics that is observed across many orders of magnitude in Reynolds number. It involves energy transfer from small elastic scales to large flow scales. The investigation of the mechanisms of EIT offers the possibility to better understand other complex phenomena such as elastic turbulence and maximum drag reduction. In this review, we survey recent research efforts that are advancing the understanding of the dynamics of EIT. We highlight the fundamental differences between EIT and Newtonian/inertial turbulence from the perspective of experiments, numerical simulations, instabilities, and coherent structures. Finally, we discuss the possible links between EIT and elastic turbulence and polymer drag reduction, as well as the remaining challenges in unraveling the self-sustaining mechanism of EIT. https://research-explorer.ista.ac.at/download/12681/12690/2023_AnnReviewFluidMech_Dubief.pdf application/pdfno https://creativecommons.org/licenses/by/4.0/ Annual Reviews2023 eng 0066-4189 1545-4479 00091541810002610.1146/annurev-fluid-032822-025933 551675-705 Dubief, Y., Terrapon, V. E., &#38; Hof, B. (2023). Elasto-inertial turbulence. <i>Annual Review of Fluid Mechanics</i>. Annual Reviews. <a href="https://doi.org/10.1146/annurev-fluid-032822-025933">https://doi.org/10.1146/annurev-fluid-032822-025933</a> Dubief Y, Terrapon VE, Hof B. 2023. Elasto-inertial turbulence. Annual Review of Fluid Mechanics. 55(1), 675–705. Dubief, Yves, et al. “Elasto-Inertial Turbulence.” <i>Annual Review of Fluid Mechanics</i>, vol. 55, no. 1, Annual Reviews, 2023, pp. 675–705, doi:<a href="https://doi.org/10.1146/annurev-fluid-032822-025933">10.1146/annurev-fluid-032822-025933</a>. Dubief, Yves, Vincent E. Terrapon, and Björn Hof. “Elasto-Inertial Turbulence.” <i>Annual Review of Fluid Mechanics</i>. Annual Reviews, 2023. <a href="https://doi.org/10.1146/annurev-fluid-032822-025933">https://doi.org/10.1146/annurev-fluid-032822-025933</a>. Y. Dubief, V. E. Terrapon, and B. Hof, “Elasto-inertial turbulence,” <i>Annual Review of Fluid Mechanics</i>, vol. 55, no. 1. Annual Reviews, pp. 675–705, 2023. Y. Dubief, V.E. Terrapon, B. Hof, Annual Review of Fluid Mechanics 55 (2023) 675–705. Dubief Y, Terrapon VE, Hof B. Elasto-inertial turbulence. <i>Annual Review of Fluid Mechanics</i>. 2023;55(1):675-705. doi:<a href="https://doi.org/10.1146/annurev-fluid-032822-025933">10.1146/annurev-fluid-032822-025933</a> 126812023-02-26T23:01:01Z2023-08-01T13:19:47Z