Abstract
More than two decades ago it was discovered that very viscous fluids can become turbulent even when the flow speed is vanishingly small. We perform challenging three-dimensional direct numerical simulation of this purely elastic turbulence in the prototypical Taylor-Couette flow with the aim to unravel the underlying mechanism. We demonstrate that in this unique inertialess turbulent state, large-scale solitary vortices and anisotropic elastic traveling waves as well as random velocity perturbations delicately sustain the turbulent dynamic cycle.
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