Title: A VOF-based 3D numerical investigation of evaporating, deformed droplets

Authors: J. Schlottke, E. Dulger, B. Weigand

Addresses: Institut fur Thermodynamik der Luft- und Raumfahrt (ITLR), Universitat Stuttgart, 70569 Stuttgart, Germany. ' Institut fur Thermodynamik der Luft- und Raumfahrt (ITLR), Universitat Stuttgart, 70569 Stuttgart, Germany. ' Institut fur Thermodynamik der Luft- und Raumfahrt (ITLR), Universitat Stuttgart, 70569 Stuttgart, Germany

Abstract: We present 3D numerical simulations of evaporating, deformed droplets using an in-house DNS Code which solves the incompressible Navier Stokes equations and employs the Volume of Fluid (VOF) method in order to account for multiple phases. The vapour phase is represented by an additional VOF variable and the evaporation rate is computed based on the mass fraction gradient at the interface (Schlottke and Weigand, 2008). The potential of the method is demonstrated for different cases of evaporating droplets. A distinct relationship between the droplets| shape and the mass transfer intensity is found as part of the results.

Keywords: VOF; volume of fluid; droplets; evaporation; deformation; direct numerical simulation; DNS; incompressible Navier Stokes equations; mass transfer.

DOI: 10.1504/PCFD.2009.027374

Progress in Computational Fluid Dynamics, An International Journal, 2009 Vol.9 No.6/7, pp.426 - 435

Published online: 21 Jul 2009 *

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