Experimental test of the crossover between the inertial and the dissipative range in a turbulent swirling flow

Abstract : The kinetic energy spectrum of high-Reynolds turbulent swirling flows is experimentally studied. This spectrum, obtained from direct measurements in space, exhibits nearly two decades of Kol-mogorov k −5/3 decay in the inertial range of scales. Beyond this regime, in the dissipative range of scales, a crossover to a stretched exponential decay on scale k 2/3 is observed, in full agreement with a recent theoretical prediction based on Non-Perturbative Renormalization Group theory.
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Submitted on : Monday, February 26, 2018 - 10:08:49 AM
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Paul Debue, Denis Kuzzay, Ewe-Wei Saw, François Daviaud, Bérengère Dubrulle, et al.. Experimental test of the crossover between the inertial and the dissipative range in a turbulent swirling flow. Physical Review Fluids, American Physical Society, 2018, 3 (2), pp.024602. ⟨10.1103/PhysRevFluids.3.024602⟩. ⟨hal-01531233⟩

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