The folders contain simulation output data. 
The developed solver used for the simulations in Ansys Fluent with the user-defined functions will be published soon through the library of RWTH Aachen University.
The solver will be accessible under: https://doi.org/10.18154/RWTH-2024-05749 

A dataset belongs to the following article: 
Radiation modelling considering burnout-dependent properties and cellwise non-uniform particle distributions in the numerical simulation of pulverised solid fuel combustion

Hossein Askarizadeh*, Stefan Pielsticker, Hendrik Nicolai, Matthias Koch, Reinhold Kneer, Christian Hasse and Anna Maßmeyer

Fuel Volume 381, Part B, 1 February 2025, 133338   
DOI: https://doi.org/10.1016/j.fuel.2024.133338

Please cite both the dataset (https://doi.org/10.18154/RWTH-2024-07124) and the paper (https://doi.org/10.1016/j.fuel.2024.133338) if you use the dataset for your research.
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Folder "01_Absorption and scattering efficiencies of char and ash" includes the tabulated data used as the absorption and scattering efficiencies via user-defined functions in the simulations. 
Please note that, as an example, the following code has been used in Matlab to plot Figure 2 for char absorption efficiency:

figure
Char_Abs = fit([X, Y], Char_abs, 'linearinterp') ;
plot(Char_Abs, [X,Y], Char_abs) ;

X, Y, and Char_abs together with the particle diameter and temperature range used for the determination of the efficiencies are available in the folder.
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Folder "02_Validation" contains two subfolders: "01_Velocity (Figure 4)", and "02_Temperature (Figure 5)" with numerical simulation results.
Subfolder "01_Velocity (Figure 5)" includes RANS particle axial and tangential velocity components at 8 different distances from the dump plane below the diffuser defined in Figure 2 in the paper. 
However, the comparison in Figure 4 in the paper were done only for selected levels in the chamber, for which LES data are also available.

Subfolder "02_Temperature (Figure 4)" includes RANS particle temperatures at 3 different distances from the dump plane below the diffuser defined in Figure 2 in the paper. 

For all the XY-plots data:
First column: radial distance from the chamber axis on each level [m]
Second column in each corresponding file: the variable of interest
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Folder "03_Contour" includes simulation data used to produce figures 6 and 7 in the paper.
The first subfolder "01_Reference case" contains the simulation results for the reference case and the second subfolder "02_Only gas radiation" provides the simulation results for the case where 
only gas radiation was considered.

Note that the name of the corresponding variable of each data column in the Contour files is to be taken from the first row in these files.
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Folder "04_XY_Plots" contains all the necessary data for Figures 8-12 in the paper. The corresponding data for each figure/subfigure can be found refferring to the name of each subfolder available 
in "04_XY_Plots". Note that, for plotting some of the variables, a bit of calculations might be needed. These calculations are based on physical laws, e.g., Stefan-Boltzmann's law for gas radiation.