X-ray tomography of foam
X-ray tomography of foam
Person in charge: Artem Skrypnik
Project leader: Sascha Heitkam
Duration: 05/2021 – 04/2023
Funding: DFG / Emmy-Noether
Project description
X-Ray tomography is a well-known method of non-intrusive technique that allows to look through opaque objects. Thanks to the different attenuation properties of various matter, the intensity of an X-Ray beam is decreased proportional to the integrated density along the beam direction.
This project aims to apply a high-speed X-Ray tomography approach to the flow of foam and froth in order to resolve its local velocity distribution. Such technique makes it possible to overcome the difficulties related to the opaqueness of the studied matter and susceptibility to stresses and disturbances.
A high speed ROssendorf Fast Electron beam X-ray tomograph, also known as ROFEX has been developed at the Institute of Fluid Dynamics of HZDR for such comprehensive problems. By the use of a computing tomography imaging technique, it records radiographic projections of a moving sample, or flow, from different angles at different attitude.
In our experiments, the planes perpendicular to the flow are reconstructed from the tomographic projections. Due to the high frame rate (8000 fps) and detector read-out frequency (1 MHz) a foam flow dynamics may be resolved. The cross correlation of the preceding planes along the flow allows determining a 2D1C vector field.