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 behaviour. 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 drops might contain several species. Relevant technical applications are the injection of water spray into the compressor inlet of industrial gas turbines for rapid power augmentation or the injection of fuel into combustors. The impact of multi-component droplets on structured surfaces is also an issue in engineered geosystems, which is one visionary example (Vision 1) of EXC 2075. Multi-component droplet interactions, also with walls, its 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 will be done by using the incompressible DNS program FS3D. PN1-2B hereby interacts strongly with PN1-2A where compressible methods are used. Especially, the comparisons between the different approaches will be very fruitful. In addition to the above-mentioned tasks, this project will also support the experiments in PN1-3 with numerical calculations of the single-phase, turbulent flow interaction with a porous medium. For this support function, the open source program OpenFOAM will be used.
|Project Number||PN 1-2B|
|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||October 2019 - March 2023|
|Project Leader||Kathrin Schulte
|Project Members||Matthias Ibach, PhD Researcher|