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Visualization Techniques for Droplet Interfaces and Multiphase Flow

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Droplet Interactions and Spray Processes

Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 121))

Abstract

The analysis of large multiphase flow simulation data poses an interesting and complex research question, which can be addressed with interactive visualization techniques, as well as semi-automated analysis processes. In this project, the focus lies on the investigation of forces governing droplet evolution. Therefore, our proposed methods visualize and allow the analysis of droplet deformation and breakup, droplet behavior and evolution, and droplet-internal flow. By deriving quantities for interface stretching and bending, we visualize and analyze the influence of surface tension force on breakup dynamics, and forces induced by Marangoni convection. Using machine learning to train a simple model for the prediction of physical droplet properties, we provide a visual analysis framework that can be used to analyze large simulation data. Computing droplet-local velocity fields where every droplet is observed separately in its own frame of reference, we create local, interpretable visualizations of flow within droplets, allowing for the investigation of the influence of flow dynamics on droplet evolution.

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Acknowledgements

This chapter was written by Alexander Straub and Thomas Ertl, but many more took part in the research for the herein presented projects (in alphabetical order): Sebastian Boblest, Steffen Frey, Moritz Heinemann, Grzegorz K. Karch, Filip Sadlo, Jonas Steigerwald, Gleb Tkachev, and Bernhard Weigand. This work was partially funded by Deutsche Forschungsgemeinschaft (DFG) as part of the Cluster of Excellence EXC 2075 “SimTech” (390740016), Transregional Collaborative Research Center SFB/Transregio 75 (84292822), and the International Research Training Group GRK 2160 “DROPIT” (270852890).

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Authors and Affiliations

  1. Institute for Visualization and Interactive Systems, Universitätsstr. 38, 70569, Stuttgart, Germany

    Alexander Straub & Thomas Ertl

Authors
  1. Alexander Straub
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  2. Thomas Ertl
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Correspondence to Alexander Straub .

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Editors and Affiliations

  1. Institute of Aerospace Thermodynamics, University of Stuttgart, Stuttgart, Baden-Württemberg, Germany

    Grazia Lamanna

  2. Dipartimento di Ingegneria e Scienze Applicate, Università degli Studi di Bergamo, Dalmine, Bergamo, Italy

    Simona Tonini

  3. Dipartimento di Ingegneria e Scienze Applicate, Università degli Studi di Bergamo, Dalmine, Bergamo, Italy

    Gianpietro Elvio Cossali

  4. Institute of Aerospace Thermodynamics, University of Stuttgart, Stuttgart, Baden-Württemberg, Germany

    Bernhard Weigand

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Straub, A., Ertl, T. (2020). Visualization Techniques for Droplet Interfaces and Multiphase Flow. In: Lamanna, G., Tonini, S., Cossali, G., Weigand, B. (eds) Droplet Interactions and Spray Processes. Fluid Mechanics and Its Applications, vol 121. Springer, Cham. https://doi.org/10.1007/978-3-030-33338-6_16

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  • DOI: https://doi.org/10.1007/978-3-030-33338-6_16

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-33337-9

  • Online ISBN: 978-3-030-33338-6

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