Smoothed Particle Hydrodynamics for Numerical Predictions of Primary Atomization

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Abstract

A code framework based on the Smoothed Particle Hydrodynamics (SPH) method has been used to investigate the liquid disintegration processes of an air-assisted atomizer. As the flow physics includes spatial and temporal scales which cover at least 4 orders of magnitude, the use of HPC resources is indispensable. The application of the SPH method is rather new to computational fluid dynamics (CFD). We therefore compare our in-house code to established CFD tools in order to assess the computational performance as well as the quality the physical results. It can be shown, that SPH is able to outperform commonly used grid based methods concerning the scalability behavior as well as the absolute computing speed. The three dimensional test case to be presented consists of 1.2 billion particles. The simulation has been run on the ForHLR I cluster, where 2560 cores have been used for 60 days. The simulation is the most detailed numerical investigation of a prefilmer based atomizer and one of the largest SPH multi-phase flow simulations ever. It did capture the experimentally observed bag breakup regime with good agreement of the spatial liquid disintegration and the breakup time scales.

Keywords

Smooth Particle Hydrodynamic Smooth Particle Hydrodynamic Commercial Code Smooth Particle Hydrodynamic Method Wall Clock Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

This work was performed on the computational resource ForHLR Phase I funded by the Ministry of Science, Research and the Arts Baden-Württemberg and DFG (“Deutsche Forschungsgemeinschaft”). We greatly acknowledge the excellent technical support provided by the Steinbuch Centre for Computing (SCC) at the Karlsruhe Institute of Technology.

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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  1. 1.Institut für Thermische StrömungsmaschinenKarlsruher Institut für TechnologieKarlsruheGermany

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