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Journals / Turkish Journal of Engineering / 2026 / Volume: 2 Issue: 2

EXPERIMENTAL INVESTIGATION OF FLOW STRUCTURE DOWNSTREAM OF PERMEABLE CYLINDERS

Bengi Şanlı0000-0001-6805-2454
Hüseyin Akıllı0000-0002-5342-7046
Pages
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Publication Date
2018-05-15
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

For the permeable cylinders having the porosity higher than 0.6, the flow behaves as there is no object in flow.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Flow structure downstream of permeable cylinders was investigated using high-image density Particle Image Velocimetry technique in deep water.
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Key Findings & Data:The free stream velocity is U ∞ = 156 mm/s, which corresponds to the Reynolds number of Re=6250 based on the cylinder diameter D=37.5 mm.
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Conclusion & Impact:For the permeable cylinders having the porosity higher than 0.6, the flow behaves as there is no object in flow.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:PIV · vortex shedding · permeable cylinder

Abstract

Flow structure downstream of permeable cylinders was investigated using high-image density Particle Image Velocimetry technique in deep water. The free stream velocity is U ∞ = 156 mm/s, which corresponds to the Reynolds number of Re=6250 based on the cylinder diameter D=37.5 mm. To reveal the effect of the porosity, four different porosities (β= 0.4, 0.5, 0.6 and 0.7) were used. This study showed that the usage of permeable cylinder decreases the occurrence of large-scale vortical structures downstream of the bluff body. As the porosity increases, turbulent kinetic energy, Reynolds shear stress and intensity of turbulences decrease as a sign of attenuated fluctuations in the wake region. For the permeable cylinders having the porosity higher than 0.6, the flow behaves as there is no object in flow.

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Cite This Article

Şanlı, B., Akıllı, H. (2018). EXPERIMENTAL INVESTIGATION OF FLOW STRUCTURE DOWNSTREAM OF PERMEABLE CYLINDERS. Turkish Journal of Engineering, Volume: 2 Issue: 2. https://doi.org/10.31127/tuje.349532

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