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Author: John, Volker × Author: Schmeyer, Ellen × End date: 2019 × Start date: 2010 × Type: Text × Subject: direct discretizations × WGL Institute: WIAS ×

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    Numerical simulations and measurements of a droplet size distribution in a turbulent vortex street
    (Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik, 2014) Schmeyer, Ellen; Bordás, Róbert; Thévenin, Dominique; John, Volker
    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 NavierStokes 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.