Title: A novel application of barycentric coordinates to Lagrange two-way coupled spray calculations

Authors: A. Sinigersky; R. Koch; H-J. Bauer

Addresses: FE-DESIGN, ul. Prof. G. Bradistilov 6, 1700 Sofia, Bulgaria ' Institut für Thermische Strömungsmaschinen, KIT – Campus Süd, Kaiserstrasse 12, 76131 Karlsruhe, Germany ' Institut für Thermische Strömungsmaschinen, KIT – Campus Süd, Kaiserstrasse 12, 76131 Karlsruhe, Germany

Abstract: Modern CFD codes make possible the application of two-way coupled Lagrange particle tracking to complex unstructured meshes. State of the art tracking algorithms require the handling of arbitrary-shaped finite volume cells. By developing a new universal module for particle tracking, a novel technique has been introduced: association of the instantaneous particle location to the nearest vertex within a cell. The nearest-node method is then used to store the source terms arising from the spray calculation into vertex-based fields. In this novel method, barycentric coordinates are used for defining the vicinity of a vertex within a cell. The major benefits of this approach are its high computational efficiency and its ability to suppress the influence of mesh skewness on the quality of the results.

Keywords: two-phase flow; particle tracking; two-way coupling; unstructured meshes; barycentric coordinates; computational fluid dynamics; CFD; spray calculations; finite volume cells; vertex; mesh skewness.

DOI: 10.1504/PCFD.2013.057100

Progress in Computational Fluid Dynamics, An International Journal, 2013 Vol.13 No.6, pp.337 - 345

Available online: 08 Oct 2013 *

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