Tensor-Geometry-Activated Spectral Energy Transfer at Reynolds Numbers of Order Unity in Two-Dimensional Flows
Turbulence-grade spectral energy transfer does not require inertia. By aligning the stress and strain-rate tensors with small directional perturbations in an electromagnetically driven thin-layer flow, the scale-to-scale energy flux is amplified up to ~300× at Re ~ O(1), crossing the weak-turbulence threshold in a nominally laminar flow.