TY  - JOUR
A1  - Blau, Benjamin
A1  - Krzeczek, Oscar
A1  - Heinrich, Christoph
A1  - Klein, Markus
T1  - Analysis of water-in-gasoline emulsions via experiments and direct numerical simulations
T2  - Experimental and Computational Multiphase Flow
N2  - This work explores the combination of direct numerical simulations (DNSs) and experimental approaches for studying technical emulsification processes. Although emulsions have long been used in a variety of industries and many important research papers have been published over the years, quantifying and predicting the dispersion of droplets in another liquid remains challenging because of the complex multiphase nature and microscopic droplet scales. This study focuses on water-in-gasoline emulsions, which have the potential to improve efficiency and reduce emissions in combustion-based power generation. Experimental data from two different emulsion injection systems are complemented with DNS to gain insight into emulsification and the resulting droplet size distribution. In situ shadow imaging is used to acquire the experimental droplet size distributions, whereas DNS is performed via the geometric volume of fluid (VoF) method with the open-source code PARIS. The results indicate consistent agreement between the experimental and simulation results. Additionally, a corresponding trend of increasing droplet size is observed as the volume fraction of the dispersed phase increases. Furthermore, a detailed analysis of various probability density functions for modeling droplet size distributions (DSDs) reveals that the gamma distribution is the most appropriate. Overall, this work demonstrates that DNS can be successfully combined with experiments to increase the understanding of emulsification processes.
KW  - emulsion
KW  - direct numerical simulation (DNS)
KW  - multiphase flow
KW  - water injection
KW  - droplet size distribution (DSD)
KW  - Emulsion
KW  - Wasser
KW  - Benzin
KW  - Direkte numerische Simulation
KW  - Mehrphasenströmung
KW  - Wassereinspritzung
Y1  - 2026
UR  - https://hst.opus.hbz-nrw.de/frontdoor/index/index/docId/1087
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:tr5-10877
VL  - 7
IS  - 2
SP  - 178
EP  - 196
PB  - Springer
ER  -