Thomas Rockstroh
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View article: Deterministic periodic structures in a model of the human airways
Deterministic periodic structures in a model of the human airways Open
Normal breathing induces significant variations in Reynolds numbers throughout the human airways, resulting in distinct flow regimes. However, the onset of instabilities and the development of flow structures in this context are not yet fu…
View article: A multi-directional redundant 3D-LPT system for ship–flight–deck wind interactions
A multi-directional redundant 3D-LPT system for ship–flight–deck wind interactions Open
In the past years, volumetric velocimetry measurements with helium-filled soap bubbles as tracer particles have been introduced in wind tunnel experiments and performed at large-scale, enabling the study of complex body aerodynamics. A lim…
Turbulent Channel Flow Diagnostics By Means Of Shake-The-Box (STB): Flow Structures And Sublayer Profiles Open
Time-resolved Shake-the-Box (STB) experiments have been conducted in the channel-flow facility at the Institute of Fluid Mechanics (ISTM) at f = 30 kHz repetition rate to study the near-wall velocity field at a viscous Reynolds number of R…
Volumetric Flow Field Measurements Around A Stepped Cylinder With An Object-Aware Lagrangian Particle Tracking Approach Open
Instantaneous, three-dimensional flow field measurements around cylindrical objects can pose special problems for the experimental set-up due to the complex camera set-up required to image the complete measurement domain. Recently, a novel…
Lagrangian particle tracking in the presence of obstructing objects Open
Volumetric flow measurement techniques have become the state-of-the-art for characterizing a broad range of different flow fields. Still, certain major limitations are present, which hinders the application of these techniques for some of …
View article: Non-invasive calibration for volumetric flow measurements in confined spaces
Non-invasive calibration for volumetric flow measurements in confined spaces Open
The calibration of a multi-camera system is a crucial step of volumetric flow measurements with photogrammetric methods. Conventional calibration methods are based on recording hardware targets, which are placed in the cameras fields of vi…
Benchmarking of different Multi-pass Shake-the-Box strategies Open
Within this study several advanced Multi-pass Shake-the-Box processing strategies are compared to the standard single-pass approach and are evaluated based on their reconstruction quality of two time-resolved experimental flow cases. The c…
View article: Non-Invasive Laser-Cross Calibration For Volumetric Flow Measurements In Closed Channels
Non-Invasive Laser-Cross Calibration For Volumetric Flow Measurements In Closed Channels Open
The calibration of a multi-camera system is a crucial step of a 3D particle tracking velocimetry (3D-PTV) measurement and other optical velocimetry techniques, which are based on multi-camera setups. Conventional calibration methods for mu…