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Modeling of the Deformation Dynamics of Single and Twin Fluid Droplets Exposed to Aerodynamic Loads

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High Performance Computing in Science and Engineering ´16

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Abstract

Droplet deformation and breakup plays a significant role in liquid fuel atomization processes. The droplet behavior needs to be understood in detail, in order to derive simplified models for predicting the different processes in combustion chambers. Therefore, the behavior of single droplets at low aerodynamic loads was investigated using the Lagrangian, mesh-free Smoothed Particle Hydrodynamics (SPH) method. The simulations to be presented in this paper are focused on the deformation dynamics of pure liquid droplets and fuel droplets with water added to the inside of the droplet. The simulations have been run at two different relative velocities. As SPH is relatively new to Computational Fluid Dynamics (CFD), the pure liquid droplet simulations are used to verify the SPH code by empirical correlations available in literature. Furthermore, an enhanced characteristic deformation time is proposed, leading to a good description of the temporal initial deformation behavior for all investigated test cases. In the further course, the deformation behavior of two fluid droplets are compared to the corresponding single fluid droplet simulations. The results show an influence of the added water on the deformation history. However, it is found that, the droplet behavior can be characterized by the pure fuel Weber number.

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Acknowledgements

The financial support of the German Federal Ministry of Economics and Technology and Siemens AG within the cooperative research project ‘Entwicklung von Verbrennungstechnologien im CEC für klimaschonende Energieerzeugung (03ET7011E)’ is gratefully acknowledged.

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”).

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Authors and Affiliations

  1. Institut für Thermische Strömungsmaschinen, Karlsruhe Institut für Technologie, Kaiserstrae 12, 76131, Karlsruhe, Germany

    Lars Wieth, Samuel Braun, Geoffroy Chaussonnet, Thilo F. Dauch, Marc Keller, Corina Höfler, Rainer Koch & Hans-Jörg Bauer

Authors
  1. Lars Wieth
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  2. Samuel Braun
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  3. Geoffroy Chaussonnet
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  4. Thilo F. Dauch
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  5. Marc Keller
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  6. Corina Höfler
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  7. Rainer Koch
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  8. Hans-Jörg Bauer
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Corresponding author

Correspondence to Lars Wieth .

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Editors and Affiliations

  1. Zentrum für Informationsdienste und Hochleistungsrechnen (ZIH), Technische Universität Dresden, Dresden, Germany

    Wolfgang E. Nagel

  2. Abteilung für Angewandte Mathematik, Universität Freiburg, Freiburg, Germany

    Dietmar H. Kröner

  3. Höchstleistungsrechenzentrum Stuttgart (HLRS), Universität Stuttgart, Stuttgart, Germany

    Michael M. Resch

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Wieth, L. et al. (2016). Modeling of the Deformation Dynamics of Single and Twin Fluid Droplets Exposed to Aerodynamic Loads. In: Nagel, W.E., Kröner, D.H., Resch, M.M. (eds) High Performance Computing in Science and Engineering ´16. Springer, Cham. https://doi.org/10.1007/978-3-319-47066-5_21

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