Original paper

Numerical simulations and measurements of a droplet size distribution in a turbulent vortex street

Schmeyer, Ellen; Bordás, Róbert; Thévenin, Dominique; John, Volker

Meteorologische Zeitschrift Vol. 23 No. 4 (2014), p. 387 - 396

23 references

published: Sep 26, 2014
published online: Aug 27, 2014
manuscript accepted: May 28, 2014
manuscript revision received: Apr 10, 2014
manuscript revision requested: Mar 2, 2014
manuscript received: Dec 18, 2013

DOI: 10.1127/0941-2948/2014/0570

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A turbulent vortex street in an air flow interacting with a disperse droplet population is investigated in a wind tunnel. Non-intrusive measurement techniques are used to obtain data for the air velocity and the droplet velocity. The process is modeled with a population balance system consisting of the incompressible Navier-Stokes equations and a population balance equation for the droplet size distribution. Numerical simulations are performed that rely on a variational multiscale method for turbulent flows, a direct discretization of the differential operator of the population balance equation, and a modern technique for the evaluation of the coalescence integrals. After having calibrated two unknown model parameters, a very good agreement of the experimental and numerical results can be observed.


two-phase turbulent vortex streetdisperse droplet populationnon-intrusive measurementspopulation balance systemdirect discretization