Measuring techniques
Flow rates and turbulence intensities can be measured with spatial high resolution using a Laser-Doppler-Anemometer (LDA) . Moreover, it is possible to determine the size distribution of dispersed, sherical particles or drops online in the process using the Phasen-Doppler-Anemometry (PDA) .
The use and further development of imaging techniques (e.g. PIV) for experimental analysis of single and multi phase flows is another research point of the institute. Different measurement methods can be realised using continuous and pulsed lasers. High resolution CCD cameras in combination with different lenses make both the observation of macroscopic flow fields with particles and microscopic ranges for the analysis of the behaviour of single particles and/or particle swarms possible. Furthermore, the flow rate of the continuous phase as well as of the particles can be determined using double imaging cameras (particle image velocimetry, PIV). Recent developments even make an online determination of particle size and shape possible.
- Laser-Doppler-Anemometry
- Phase-Doppler-Anemometry
- imaging techniques (PIV, PTV)