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Lagrangian and Vortex-Surface Fields in Turbulence

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Table 2.1: Summary of DNS parameters for isotropic turbulence
Figure 2.2: The xwith the initial conditionand zoomed parts of plane-cuts at a small region–y plane-cut at z = π from the three-dimensional Lagrangian field at t = 2.5Te φ0 = cos x in the forced stationary homogeneous and isotropic turbulence, 2.5 ≤ x ≤ 2.9 and 3.6 ≤ y ≤ 4 with increasingresolutions
Figure 2.3: The xwith the initial condition–y plane-cut at z = π from the three-dimensional Lagrangian field at t = 2.5Te φ0 = cos x and resolution 40962 in the frozen turbulent field
Figure 2.5: Iso-surfaces (φ = 0.3) of three-dimensional Lagrangian fields with the blob-like initialφ(1)0at different times
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Outline

Description of the methodology Results and discussion Geometry of Lagrangian structures on the x – z (streamwise and wall-normal) Comparisons of Lagrangian and Eulerian structures Evolution of Lagrangian and vortex-surface fields Relations between vortex-surface fields and vorticity fields

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