Many processes in nature and engineering are determined by a strong coupling of multiphase flow dynamics with interfacial transport processes on small scales, which have a huge impact on large-scale system behavior. Here, an important aspect of this is the interaction of droplets with each other and with surfaces as well as phase change phenomena during droplet interaction. Often the droplets might contain several species. Relevant technical applications are the injection of water into the compressor and/or the combustor of gas turbines for power augmentation and emission reduction or the injection of fuel sprays into combustors. In addition, the impact of droplets onto structured surfaces and films is important in engineered geosystems. Single- and multi-component droplet interactions including phase change and the corresponding interfacial phenomena can be described in detail by means of Direct Numerical Simulation (DNS). Sub-scale models deduced from the DNS can be used later in more complex large-scale simulations and for interface modelling. We thus create the basis for the development of data-integrated simulations for multiphase flow applications in this project. The above-described work is performed using the incompressible DNS program Free Surface 3D (FS3D). PN1-2 (II) hereby interacts strongly with PN1-9 where compressible methods are used. Comparisons between both methods are important in order to explore the validity ranges of incompressible calculations. In addition to the above-mentioned tasks, this project supports the experiments in PN1-3 (II) with numerical calculations of turbulent flow interaction with a porous medium. For this support function, also other codes are used (e.g. the open source program Open-FOAM).
Publications of PN 1-2 (II)
- J. Potyka and K. Schulte, “A volume of fluid method for three dimensional direct numerical simulations of immiscible droplet collisions,” International Journal of Multiphase Flow, vol. 170, p. 104654, Jan. 2024, doi: 10.1016/j.ijmultiphaseflow.2023.104654.
- A. Straub, G. K. Karch, J. Steigerwald, F. Sadlo, B. Weigand, and T. Ertl, “Visual Analysis of Interface Deformation in Multiphase Flow,” Journal of Visualization, 2023, doi: https://doi.org/10.1007/s12650-023-00939-x.
- J. L. Stober, J. Potyka, M. Ibach, B. Weigand, and K. Schulte, “DNS of the Early Phase of Oblique Droplet Impact on Thin Films with FS3D,” High Performance Computing in Science and Engineering ’23, Springer International Publishing, 2023. [Online]. Available: /brokenurl# https://doi.org/10.48550/arXiv.2311.17690
- J. Potyka, K. Schulte, and C. Planchette, “Simulation and Experimental data on liquid distribution after the head-on separation of immiscible liquid droplet collisions.” 2023. doi: 10.18419/darus-3594.
- J. Potyka, K. Schulte, and C. Planchette, “Liquid distribution after head-on separation of two colliding immiscible liquid droplets,” Physics of Fluids, vol. 35, no. 10, Art. no. 10, Oct. 2023, doi: 10.1063/5.0168080.
- J. Potyka and K. Schulte, “Setups for and Outcomes of Immiscible Liquid Droplet Collision Simulations.” 2023. doi: 10.18419/darus-3557.
- H. Mandler and B. Weigand, “Feature importance in neural networks as a means of interpretation for data-driven turbulence models,” Computers & Fluids, p. 105993, Jul. 2023, doi: 10.1016/j.compfluid.2023.105993.
- J. Kromer, J. Potyka, K. Schulte, and D. Bothe, “Efficient sequential PLIC interface positioning for enhanced performance of the three-phase VoF method,” Computers & Fluids, vol. 266, p. 106051, Nov. 2023, doi: 10.1016/j.compfluid.2023.106051.
- M. Ibach, V. Vaikuntanathan, Al. Arad, D. Katoshevski, B. Greenberg, and B. Weigand, “Numerical Study of Oscillating Droplets and their Relevance to Grouping in Streams,” presented at the ILASS-Europe 2023, 32nd Conference on Liquid Atomization and Spray Systems, 4-7 September 2023, 2023.
- J. Potyka et al., “Towards DNS of Droplet-Jet Collisions of Immiscible Liquids with FS3D,” High Performance Computing in Science and Engineering ’22, Springer International Publishing, 2022. [Online]. Available: https://arxiv.org/abs/2212.09727
- H. Mandler and B. Weigand, “A realizable and scale-consistent data-driven non-linear eddy viscosity modeling framework for arbitrary regression algorithms,” International Journal of Heat and Fluid Flow, vol. 97, p. 109018, 2022, doi: https://doi.org/10.1016/j.ijheatfluidflow.2022.109018.
- H. Mandler and B. Weigand, “On frozen-RANS approaches in data-driven turbulence modeling: Practical relevance of turbulent scale consistency during closure inference and application,” International Journal of Heat and Fluid Flow, vol. 97, p. 109017, 2022, doi: https://doi.org/10.1016/j.ijheatfluidflow.2022.109017.
|Project Number||PN 1-2 (II)|
|Project Name||3D Direct Numerical Simulation of Multi-Component Droplet Interaction including Phase Change as a Basis for Sub-Scale Models for Data-Integrated Multiphase Simulations|
|Project Duration||April 2023 - December 2025|
|Project Members||Johanna Potyka, doctoral researcher|