Contribution
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 références bibliographiques
publié: Sep 26, 2014
publication en ligne: Aug 27, 2014
manuscrit accepté: May 28, 2014
révision final du manuscrit reçu: Apr 10, 2014
révision du manuscrit demandée: Mar 2, 2014
manuscrit reçu: Dec 18, 2013
DOI: 10.1127/0941-2948/2014/0570
Open Access (article peut être télechargé gratuitement)
Abstract
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.
Mots-clefs
two-phase turbulent vortex street • disperse droplet population • non-intrusive measurements • population balance system • direct discretization