Abstract
This study focuses on the dynamics of two equal-sized droplets of non-Newtonian liquids with simulations using the volume of fluid method and the local front reconstruction method. The non-Newtonian behavior is implement via a power-law model. The droplet interactions are performed for Weber numbers ranging from 20 to 300 and impact parameters from 0 to 0.6. Both methods produce similar results at low Weber numbers, while the disintegration of the droplets at high Weber numbers occurs via different mechanisms. Our results demonstrate that the boundaries of the collision maps are highly dependent on the power-law index. Additionally, the diameter of the ring for head-on collisions is increased with increasing Weber number and decreasing power-law index, while the critical ligament length in off-center collisions increases with Weber number and power-law index.
| Original language | English |
|---|---|
| Article number | e18667 |
| Number of pages | 14 |
| Journal | AIChE Journal |
| Volume | 71 |
| Issue number | 3 |
| Early online date | 6 Dec 2024 |
| DOIs | |
| Publication status | Published - Mar 2025 |
Funding
This work is part of the \u201CEEMS\u2014Energy Efficient Milky Sprays\u201D project which took place within the framework of the Institute of Sustainable Process Technology (ISPT) and was co\u2010financed by the TKI\u2010Energy & Industry, Danone, DSM and FrieslandCampina. More information can be found on the EEMS website. In addition, this work is supported by the Netherlands Center for Multiscale Catalytic Energy Conversion (MCEC), an NWO Gravitation program funded by the Ministry of Education, Culture, and Science of the government of the Netherlands. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sk\u0142odowska\u2010Curie grant agreement No. 801359.
Keywords
- direct numerical simulations
- droplet collisions
- local front reconstruction method
- power-law fluids
- volume of fluid