University of Twente Student Theses
Flow Separation in Small, Meandering Streams
Mulder, I. (2024) Flow Separation in Small, Meandering Streams.
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| Abstract: | Flow separation near the banks of meandering rivers results in recirculating or stagnant zones, affecting river hydraulics, ecology, and morphodynamics. This research, investigates the geometric and flow characteristics controlling the onset and size of flow separation in the Glanerbeek using using Large Scale Particle Image Velocimetry (LSPIV) to visualize surface flow patterns and Real-Time Kinematic positioning (RTK) to measure cross-sectional profiles throughout the river. The study focusses on the following, potential, controlling factors: • Flow depth • Radius of the bend • Radius/width (R/B) ratio • Impingement angle • Increase in cross-sectional area. The field study was executed on a day with higher water level and a day with lower water level. Results show that the total inner bend separation areas were larger during low water levels. The strongest correlation was the increase in cross-sectional area with the outer bend separation zones, which showed that an increase in cross-sectional area leads to a decrease of the area of outer bend separation zones. The impingement angle showed a negative correlation with the size of the outer bend separation zones, as did the radius of the river bend. The R/B ratio showed correlation with the inner bend separation zones, which was stronger during the first measurement day. |
| Item Type: | Essay (Master) |
| Faculty: | ET: Engineering Technology |
| Subject: | 33 physics, 56 civil engineering |
| Programme: | Civil Engineering and Management MSc (60026) |
| Link to this item: | https://purl.utwente.nl/essays/101858 |
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