European Turbulence Conference 14

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Identifying particle clusters in turbulent flow

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We present a new method of identifying particle clusters in turbulent particle-laden flow. While earlier particle cluster definitions are based on a global density threshold, our method is based on localising local particle density maxima in a plane. The particle clusters are defined as connected regions where at least two of the eigenvalues of the Hessian of the particle concentration are negative. We test the method on a simple vortex array, where we observe that the heavy particles cluster in the straining regions between the vortices.


Christopher Nilsen    
Norwegian University of Science and Technology

Helge Andersson    
Norwegian University of Science and Technology


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