Related Publication
Supplementary material to:
P. Molina Vogelsang, T. Fuchs, S. Schubert & G. Lamanna
“Defocused Shadowgraphy μPTV for Analyzing the Spreading Mechanism of an Impacting Droplet onto a Thin Liquid Film”
DOI: [DOI will be added after publication]
Dataset Description
The data were obtained using shadowgraphy-based Defocusing Micro Particle Tracking Velocimetry (SDµPTV) and provide time- and height-resolved measurements of the flow within a radially spreading lamella generated by droplet impact onto a thin liquid film.
Contents of the Dataset
- Lamella height evolution data
- Radial slope (ar = ur/r)
- Radial velocity data (ur(r,t,z))
- Radial velocity and slope profiles at selected positions
- Scatter data for velocity visualization
- Experimental boundary conditions and metadata (
.README.txt & .README4BoundaryConditions.txt)
A detailed description of the dataset structure, file contents, and instructions for reproducing the figures is provided in the accompanying README files.
Experiments
Two fluid systems (B20 and B50) are investigated at a nominal dimensionless film thickness of h/d0 ≈ 0.18, each consisting of three repeated experiments.
In addition, raw experimental shadowgraphy images (.tif) are provided for representative cases (ID 1405 and 1420), including micro-scale bottom-view perspectives.
Data Format and Reproducibility
The dataset contains MATLAB (.mat) files and corresponding CSV exports to ensure accessibility without proprietary software dependencies. The provided scripts were developed and tested using MATLAB R2024a or later.
All processed data enable the reproduction of the key figures of the associated publication.
Figure-to-Data Mapping
Fig. 5
Data: scatterData_ID_*.csv
Script: scatterData2CSV_ur_scatter_over_time.m
Fig. 6
Data: extractedData_SlopeDecline_ID*.csv
Script: Scatter_global.m
Fig. 7
Data: extractedData_SlopeDecline_ID*.csv
Script:
Plot_global_MinMax.m
plotMinMaxWithStd_V6_DaRUS.m
Fig. 8
Data: extractedData_R1_Tau*.csv
Script: scatterData2CSV_radialVelocityProfiles_tau.m
Fig. 9
Data: extractedData_R2_Tau*.csv
Script: scatterData2CSV_radialVelocityProfiles_tau.m
Fig. 10
Data: extractedData_SlopeDecline_tau*.csv
Script: scatterData2CSV_SlopeDecline_tau.m
Fig. 11
Data: extractedData_HeightEvolution_ID*.csv
Script:
Plot_global_MinMax.m
plotMinMaxWithStd_V6_DaRUS.m
Funding
This work was carried out within the project:
GRK 2160/2 – Droplet Interaction Technologies (DROPIT)
Project number: 270852890
Funded by the Deutsche Forschungsgemeinschaft (DFG).
(2026-03-18)
