TY - GEN A1 - Hamede, Mohammed Hussein A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Experimental investigation of turbulent counter-rotating Taylor–Couette flows for radius ratio η = 0.1 T2 - Journal of Fluid Mechanics Y1 - 2023 U6 - https://doi.org/10.1017/jfm.2023.392 SN - 1469-7645 VL - 964 SP - A36-1 EP - A36-29 ER - TY - GEN A1 - Merbold, Sebastian A1 - Hamede, Mohammed Hussein A1 - Froitzheim, Andreas A1 - Egbers, Christoph T1 - Flow regimes in a very wide-gap Taylo-Couette flow with counter rotating cylinders T2 - Philosophical transactions of the Royal Society : Series A, Mathematical, physical and engineering sciences Y1 - 2023 U6 - https://doi.org/10.1098/rsta.2022.0113 SN - 1364-503X SN - 1471-2962 VL - 381 IS - 2246 ER - TY - GEN A1 - Hamede, Mohammed Hussein A1 - Merbold, Sebastian A1 - Egbers, Christoph T1 - Experimental methods for investigating the formation of flow patterns in a very wide gap Taylor-Couette flow ($\eta=0.1$) T2 - tm - Technisches Messen Y1 - 2023 U6 - https://doi.org/10.1515/teme-2022-0107 SN - 2196-7113 VL - 90 IS - 5 SP - 332 EP - 339 ER - TY - GEN A1 - Merbold, Sebastian A1 - Hasanuzzaman, Gazi A1 - Buchwald, Tom A1 - Schunk, Christoph A1 - Schmeling, Daniel A1 - Volkmann, André A1 - Brinkema, Robert A1 - Hampel, Uwe A1 - Schröder, Andreas A1 - Egbers, Christoph T1 - Reference experiment on aerosol particle transport for dynamic situations T2 - tm - Technisches Messen Y1 - 2023 U6 - https://doi.org/10.1515/teme-2022-0118 SN - 2196-7113 VL - 90 IS - 5 ER - TY - GEN A1 - Buchwald, Tom A1 - Hasanuzzaman, Gazi A1 - Merbold, Sebastian A1 - Schanz, Daniel A1 - Egbers, Christoph A1 - Schröder, Andreas T1 - Large-scale flow field and aerosol particle transport investigations in a classroom using 2D-Shake-The-Box Lagrangian Particle Tracking T2 - Heliyon Y1 - 2023 U6 - https://doi.org/10.1016/j.heliyon.2023.e22826 SN - 2405-8440 VL - 9 IS - 12 ER - TY - GEN A1 - Barzantny, Marcel A1 - Hamede, Mohammed Hussein A1 - Majchrzyk, Michał A1 - Merbold, Sebastian A1 - Egbers, Christoph A1 - Kostowski, Wojciech T1 - Experimental investigation of the flow characteristics driving the Ranque–Hilsch phenomenon T2 - International journal of heat and mass transfer N2 - The Ranque–Hilsch vortex tube (RHVT) is a device that separates a pressurized inlet stream into two decompressed streams of different temperature, flowing to the so-called hot and cold outlets. In this study, the flow structures within the vortex tube were examined qualitatively. The examination considered both compressible and incompressible fluids, using pressurized air and water as working fluids. A parametric study was conducted, in which the fluid inlet pressure and the vortex tube length were varied. Three tubes, with the same diameter but differing lengths (100, 180, and 240 mm) were utilized. The flow inside the tube was investigated using a flow visualization technique, which was employed in a variety of configurations and setups contingent on the specific fluid conditions under examination. The visualization process required the use of aerosol injection in the case of air, and kalliroscope particles in the case of water investigation. The research enabled the visualization of the flow structure within the vortex tube, thereby significantly advancing the comprehension of the underlying physical processes. The findings of the experimental research demonstrated the existence of phenomena of considerable scientific value. The internal vortex and its spatial and temporal structure observed in the RHVT were consistent with literature data. This was achieved despite the so-far established consensus that this type of research is challenging and not entirely reliable. In the course of water-based investigation, the cavitation phenomenon was observed in the vicinity of the internal vortex. This discovery is likely to be the first of its kind and may contribute significantly to the advancement of research on the Ranque–Hilsch phenomenon. KW - Ranque–Hilsch phenomenon KW - Vortex tube KW - Flow visualization KW - Cavitation Y1 - 2025 U6 - https://doi.org/10.1016/j.ijheatmasstransfer.2025.127543 SN - 0017-9310 VL - 253 SP - 1 EP - 14 PB - Elsevier BV CY - Amsterdam ER -