Replication Data for: Defocused Shadowgraphy μPTV for Analyzing the Spreading Mechanism of an Impacting Droplet onto a Thin Liquid Film

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).