X-ray- and micro-focus X-ray-computed tomography
X-ray tomography enables non-invasive and superposition-free measurement of the internal structure of objects. Beside slice-wise two-dimensional measurement and reconstruction it is also possible to reveal the three-dimensional morphology of an object within a single measurement cycle by employing cone-beam tomography utilizing a two-dimensional X-ray image detector. In the framework of research on fluid dynamics X-ray radioscopic and tomographic techniques are used for measurement of local gas and liquid hold-up in flow channels and of species distribution in chemical reaction devices.
The Institute of Fluid Dynamics qualifies and utilizes different X-ray devices for various experimental application areas. These comprise a conventional X-ray system, a micro-focus X-ray assembly and ultrafast X-ray CT setups. These systems are being used for radiography, radioscopy and cone-beam tomography of small and medium sized flow devices, thereby achieving a spatial resolution of 1.0 mm down to 5 µm.
Highest spatial resolution is achievable by employing a micro-focus X-ray system. Such a system is used for measurement in small geometries and in micro-fluidic applications (crystallization processes; two-phase flows in capillaries, small channels and structured packings; micro-structure tomography).
For two-dimensional and three-dimensional reconstruction of the extensive measurement data a set of in-house implementations of GPU-accelerated fast software algorithms is available.
ANKA Synchrotron Light Source – KIT Karlsruhe
- S. Boden, M. Haghnegahdar, U. Hampel (2017)
Measurement of Taylor bubble shape in square channel by microfocus X-ray computed tomography for investigation of mass transfer.
Flow Measurement and Instrumentation 53, 49-55
- R. Hoffmann, S. Boden, M. Schubert, U. Hampel (2016)
Measuring liquid flow in structured packings using gamma and x-ray tomography.
9th International Conference on Multiphase Flow (ICMF 2016), May 22nd-27th 2016, Firenze, Italy
- S. Boden, T. dos Santos Rolo, T. Baumbach, U. Hampel (2014)
Synchrotron radiation microtomography of Taylor bubbles in capillary two-phase flow.
Experiments in Fluids 55, 1768
- M. Schubert, A. Bieberle, F. Barthel, S. Boden, U. Hampel (2011)
Advanced Tomographic Techniques for Flow Imaging in Columns with Flow Distribution Packings.
Chemie Ingenieur Technik 83, 979-911
- S. Boden, M. Bieberle, G. Weickert, U. Hampel (2008)
Three-dimensional analysis of macroporosity distributions in polyolefin particles using X-ray microtomography.
Powder Technology 188, 81-88
- S. Boden, M. Bieberle, U. Hampel (2008)
Quantitative measurement of gas hold-up distribution in a stirred chemical reactor using X-ray cone-beam computed tomography.
Chemical Engineering Journal 139, 351-362