Large-scale structures of scalar and velocity in a turbulent jet flow
2021
In a turbulent jet flow, finite-time Lyapunov exponents gauge the exponentially fast spreading of fluid parcels. To observe their fine structure, we moved our Particle Image Velocimetry and Laser-Induced Fluorescence cameras with the mean flow. The resulting remarkable shapes in the figure are linked to the organization of a dispersed fluorescent tracer.
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