EVOLUTION OF HEAVY PARTICLE TRIANGULAR CLUSTERS IN 3-D TURBULENT FLOW

ELMaihy, A.; Aly, A. Abou EL-Azm; Nicolleau, F.

doi:10.21608/asat.2019.23885

EVOLUTION OF HEAVY PARTICLE TRIANGULAR CLUSTERS IN 3-D TURBULENT FLOW

Document Type : Original Article

Authors

¹ Egyptian Armed Forces.

² PhD Student. Department of Mechanical Engineering, University of Sheffield, Sheffield, UK.

³ Senior Lecturer.

10.21608/asat.2019.23885

Abstract

The dispersion of heavy particle triangular clusters in a homogenous, isotropic and incompressible 3-D turbulent flow have been studied using the Kinematic Simulation techniques. In this study, the evolution of the size and the shape factors of the cluster are presented at different initial separations between particles, different inertia effect (different Stokes numbers), and different values of drift velocities. For dispersion of heavy particles in turbulent flows It can be concluded that the inertia and gravity affect the size and shape of the three-particles cluster. For the effect of Reynolds number on the dispersion of heavy particle clusters, Nicolleau and ElMaihy (2006) found that all the curves for constant values of initial separations of Δ0/L1 = 0.032 and Δ0/L1 = 0.5 are approximately collapsed for factors 1/2, and <χ>]. These results can be extended to the heavy particle dispersion for Stokes numbers in the range 0.2 < St However, in the present work a limitation has been introduced for the above conclusion to initial separations above the Kolmogorov length-scale.

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