## 4 Conclusions  
Our primary objective was to measure the size distribution of droplets along a droplet absorber and validate CFD simulations based on their prediction capability. The obtained results indicate that the droplet size distribution was predicted through CFD simulations, with errors in the range of 11-27%. Our results show that at the nozzle inlet, a log-normal distribution of droplet sizes was well matched, as evidenced by an \(R^{2}\) value greater than 0.90. Furthermore, at distances of 200 mm and 400 mm from the nozzle inlet, a normal distribution of droplet sizes showed a reasonably good fit. The Lagrangian-Eulerian multiphase CFD simulations provided satisfactory approximations of both the arithmetic mean droplet diameter and its corresponding distributions for the investigated cases. The CFD model demonstrates significant potential for broader applications, offering the capability to predict droplet sizes and distributions across a variety of geometric setups and nozzle configurations, with a certain margin of error. Its adaptability is particularly noteworthy within the Rayleigh regime of flow rates, showcasing its versatility and practical utility.  
The following supporting information can be downloaded at: [[https://www.mdpi.com/article/10.3390/app14051824/s1](https://www.mdpi.com/article/10.3390/app14051824/s1)]([https://www.mdpi.com/article/10.3390/app14051824/s1](https://www.mdpi.com/article/10.3390/app14051824/s1)), Figure S1: (a) Camera calibration plate. (b) Front view and (c) Angled view of Calibration setup.; Figure S2: Measure the real distances between shapes; Figure S3: Nozzle diameter measurements.  
**Author Contributions:** Conceptualization, P.S. and K.V.; methodology, K.V., G.J. and P.S.; software, K.V. and G.J.; validation, K.V. and P.S.; investigation, K.V.; writing--original draft preparation, K.V.; writing--review and editing, K.V., G.J., H.L., A.S.-M., M.F.G. and P.S.; supervision, P.S. and G.J.; project administration, H.L. and P.S.; funding acquisition, A.S.-M. and P.S. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the BMBF (No. 011J2003B).  
Not applicable.  
**Data Availability Statement:** The data presented in this study are available in the OSF data repository, accessible via this link: [[https://doi.org/10.17605/OSF.IO/9](https://doi.org/10.17605/OSF.IO/9) RM2B]([https://doi.org/10.17605/OSF.IO/9](https://doi.org/10.17605/OSF.IO/9) RM2B).  
**Acknowledgments:** The authors extend sincere gratitude to the dedicated staff of the Max Planck Institute for Dynamics of Complex Technical Systems Magdeburg for their invaluable support throughout the project. Further, we thank our industrial partner, the CIECH group, for their cooperation and the company SChPrEngCo for initiating the CODA project.  
The authors declare no conflicts of interest.  
The following abbreviations are used in this manuscript:  
\begin{tabular}{l l} CFD & Computational Fluid Dynamics \\ VOF & Volume of Fluid \\ MEA & Monoethanolamine \\ USAXS & Ultra-Small-Angle X-ray Scattering \\ PMMA & Poly methyl methacrylate \\ RGB & Red, Green, and Blue \\ RANS & Reynolds-Averaged Navier-Stokes \\ SD & Standard Deviation \\ Q-Q & Quantile-Quantile \\ LE & Lagrangian-Eulerian \\ NTC & No Time Counter \\ \end{tabular}