The PDF file contains detailed information about the correlations and methods used to produce the data.
All the data is made available in OriginPro format in a file named RadPressure_PowTec_AllDataGraphs. All columns are labeled and after opening, it should be straightforward to identify the data for each curve.
Haeri, S. (Creator) (27 Apr 2020). Supplementary Material for: “Analysis of Radiation Pressure and Aerodynamic Forces Acting on Powder Grains in PBAM.”. University of Strathclyde. SupMaterial(.pdf), RadPressure_PowTec_AllDataGraphs(.opju). 10.15129/f76ef4e9-8272-42d7-bf0f-4e3a4402abb5