This data set contains the processed data of the wire-mesh sensor, obtained in a flow loop with inner diameter of 50 mm with a vertical section of 3 m length. The dimension of the sensor is 16x16 wires and a lateral wire distance of 3.125 mm. Each file contains data of 60 s measurement time with 10 kHz samling frequency.

The set up was operated with pressurized air and deionized water. The experimental matrix contains meausrements at different superficial velocities of the gas and the liquid. Thus different flow pattern are observed. For injection of the gas two different types have been used. In the first set of experiments (files 1- 61, injection1) the gas was injected with a small tube with inner diameter of 9 mm. In the second set of experiments (files 101 - 151, injection2) the gas was injected with a small pipe of 25 mm inner diameter.

An overview of the experimental conditions for the two sets of experiments are summarized in the excel file. The corresponding .zip files contain the processed data. These are void files, which contain the gas holdup in each crossing point and for all time steps of the measurement stack. Additionally the time averaged cross sectional gas holdup distribution (.epsxy), the time averaged radial gas holdup (.epsrad_20) and the cross sectional average gas holdup at each time step (.epst) is provided,