In the Lagrangian description, i.e., following individual fluid particles, the complexity of turbulence manifests itself in the curvature and tortuosity of the fluid particle trajectories. We recently characterized this complexity by measuring the directional change of the particles. We linked the statistics to Kolmogorov’s description of the Eulerian energy spectrum.
Staff : Wouter Bos, Benjamin Kadoch (IUSTI Marseille), Kai Schneider (I2M Marseille)
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2011
Kadoch B, Bos WJT, Schneider K. The influence of walls on lagrangian statistics in two-dimensional turbulence. Phys. Fluids. 2011;23:085111.
Kadoch B, del Castillo Negrete D, Bos WJT, Schneider K. Lagrangian statistics and flow topology in forced two-dimensional turbulence. Phys. Rev. E. 2011;83:036314.
2010
Bos WJT, Kadoch B, Neffaa S, Schneider K. Lagrangian dynamics of drift-wave turbulence. Physica D. 2010;239:1269–1277.
Kadoch B, Bos WJT, Schneider K. Origin of lagrangian intermittency in drift-wave turbulence. Phys. Rev. Lett.. 2010;105:145001.
2008
Kadoch B, Bos WJT, Schneider K. Extreme lagrangian acceleration in confined turbulent flow. Phys. Rev. Lett.. 2008;100:184503.