September 2, 2025 Dataset Restricted Access

Flow field tomography of reactive transport: comparison of β⁺ tracers ¹⁸F, ⁷⁶Br & ¹²⁴I - data publication

Schöngart, Jann; Kulenkampff, Johannes; Fischer, Cornelius

Data on two tomographic studies on Berea sandstone as supplemental information of the publication "Flow field tomography of reactive transport: comparison of β⁺ tracers ¹⁸F, ⁷⁶Br & ¹²⁴I" by Jann Schöngart, Johannes Kulenkampff, and Cornelius Fischer.

Part of the data published here was used for prior works by Schabernack et al. (2025). Therefore, the the presented dataset has overlap withthe dataset published in Kulenkampff et al. (2024). This overlap is limited to the µCT data, and the PET data for analysis D_B and D_C.

The data in this publication consists of:

µCT data

Core_D_after_dissolution_2496x2496x1615.raw:  µCT of the inlet section of berea sandstone core D before dissolution as normalized graylevel data, voxel size = 10.032 µm. Format: 3D-array of uInt16, x=1:2496, y=1:2496, z=1:1615.

Core_D_before_dissolution_2307x2329x1452_uint16.raw: µCT of the inlet section of berea sandstone core D after dissolution as normalized graylevel data, voxel size = 10.032 µm. Format: 3D-array of uInt16, x=1:2307, y=1:2329, z=1:1452.

Positron emission tomography data
All PET data is stored as three-dimensional binary arrays of floats, with a voxel size of 1.15 mm.

Stored in [subset]_PET_raw.zip: 

Uncalibrated positron emission tomography time series (decay corrected). Each image consists of two files - a header file (.hv) and the binary image file (.v). The header file contains information on how to read the binary file, as well as additional information. 
Please note that not all of the metadata given in the header file (like timestamps, etc.) are generated automatically and not neccessarily accurate.

Stored in [subset]_PET_err.zip: 

Relative errors of the PET_raw data, calculated from count rates using poisson statistics. A value of 1 equals 100% error. The volumes are cut to the ROI. The data structure is identical to [samplename]_PET_raw.zip.

Stored in [subset]_PET_corrected.zip: 

Positron emission tomography time series, corrected for tracer activity and detector sensitivity fluctuations. Values are in in Bq/voxel. Voxels with relative errors above 100% are discarded. The volumes are cut to the ROI. The data structure is identical to [samplename]_PET_raw.zip.

Flow field data
stored in [subset]_flowfield.zip: 
Flow Direction_[X]x[Y]x[Z]x1_vec3_double.raw: Flow direction vectors as binary data of the shape [x,y,z,[3]], a three dimensional array of vectors which are stored as double (float64),  voxel size = 1.15 mm.

Flow Rate_[X]x[Y]x[Z]x1_double.raw: Flow rates (uncalibrated) as binary data of the shape [x,y,z], a three dimensional array of doubles (float64),  voxel size = 1.15 mm.

Porosity_[X]x[Y]x[Z]x1_double.raw: Porosities (uncalibrated) as binary data of the shape [x,y,z], a three dimensional array of doubles (float64),  voxel size = 1.15 mm.

Transport Error_[X]x[Y]x[Z]x1_double.raw: A measure of error quantifying the ratio of computed in- and outflow to each voxel. Values close to 0 are better. Stored as binary data of the shape [x,y,z], a three dimensional array of doubles (float64),  voxel size = 1.15 mm.

Velocity_[X]x[Y]x[Z]x1_double.raw: Velocities (uncalibrated) as binary data of the shape [x,y,z], a three dimensional array of doubles (float64),  voxel size = 1.15 mm.