Direct Numerical Simulation (DNS) on the Influence of Grid Refinement for the Process of Splashing

Hassan Gomaa (), Bernhard Weigand, Mark Haas and Claus Dieter Munz
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Hassan Gomaa: Universität Stuttgart, Institut für Thermodynamik der Luft- und Raumfahrt
Bernhard Weigand: Universität Stuttgart, Institut für Thermodynamik der Luft- und Raumfahrt
Mark Haas: Universität Stuttgart, Institut für Aerodynamik und Gasdynamik
Claus Dieter Munz: Universität Stuttgart, Institut für Aerodynamik und Gasdynamik

A chapter in High Performance Computing in Science and Engineering '08, 2009, pp 241-255 from Springer

Abstract: Summary The physical process of a drop impact on a thin liquid film is studied numerically with a VOF based code for a Weber number close to the critical Weber number. At this, the influence of the grid resolution is examined. Therefore, the process was simulated on four different three-dimensional grids with a refinement factor of two in each dimension. Maximum grid sizes of about 135 million cells were reached. The investigation covers comparisons of local interface topologies, integral energy balances and secondary droplet properties. Moreover, the numerical phenomenon of flotsam inherent to VOF is examined. Furthermore, the influence of surface tension is analyzed. The simulations were performed on the NEC SX-8 platform of the HLRS.

Date: 2009
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DOI: 10.1007/978-3-540-88303-6_18

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