February 26, 2025 Dataset Open Access

Data publication: Generating structured foam via flowing through a wire array

Skrypnik, Artem; Knüpfer, Leon; Trtik, Pavel; Lappan, Tobias; Ziauddin, Muhammad; Heitkam, Sascha

The structure of liquid foam is generally considered random and isotropic. However, when foam flows past a set of wires, an inhomogeneous liquid fraction distribution, or layering, can be observed within the bulk. This dataset presents neutron radiography data of foam flowing past a set of thin metal wires. During the experiments, the gas flow rate and bubble size were varied. Additionally, a dataset for foam flow past a single wire is included for reference.

The folder includes initial data for the manuscript "Generating structured foam via flowing through a wire array".

Folder includes:

01_scripts scripts used for the data processing
02_rawdata Initial neutron imaging data (.tif images)
03_evaluation folder with MATLAB scripts used for data analysis

LABBOOK Experimental labbook explaining the experimental sequence.
Protocol The Neutron imaging protocol with the data of neutron source and image resolution

The data processing is shown for the O1 bubble generator. It includes:
1. MASK_... script used to define the cell walls and determine the mask, used further for the liquid fraction calculation.
2. N13_INIT... scritps to define normalised image, which further used to determine liquid fraction distribution
3. POST_BOT... scripts used to postprocess the data: define Liquid fraction distribution and DFT of those distributions.

Note: 

1. The data were analysed at two positions: bottom (0) and top (100), meaining at the wire grid and 100 mm downstream the grid. To this end, mask should be calculated also for the top part of the nozzle, if needed, as shown in the presented examples.

2. The data for the empty cell were calculated for the foam flow through the cell with a single thin wire. Teh data were extracted
in the ROI before the wire (run 553-557).

3. Data processing was performed as suggested in https://doi.org/10.1371/journal.pone.0210300