Uncertainty analysis of the parameters influencing the liquid crystal measurement technique


According to the current state of research, it is not yet possible to quantitatively determine wall shear stress distributions (magnitude and direction) with low measurement uncertainty. For this reason, the liquid crystal technique is being further developed at the Institute of Thermal Turbomachinery (ITS).

Thesis Focus: The liquid crystal measurement technique for determining the wall shear stress has not been sufficiently researched with regard to quantifying the influencing parameters. Only the obvious parameters are taken into account when quantifying the uncertainty. As part of your thesis, you will be involved in all steps of the data acquisition using a commercial camera, all the way through to the processing and post-processing of the data. The scientific focus of your work is the analysis of further influencing parameters and their consideration in the quantitative determination of the wall shear stresses. Furthermore, the existing evaluation routine is to be improved, e.g. using data filters. You will familiarize yourself with the liquid crystal measurement technique using the liquid crystal test rig, as well as currently available uncertainty quantification methods from literature.

Curious? Skills in Python language and sound basics in image processing are very welcome but not required. The thesis can be completed in German or English starting any time from now.