Hydrodynamics and bed morphology in a double-layered partially vegetated mobile bed channel DOI
Pritam Kumar,

Abhishek Kumar,

Anurag Sharma

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

This study investigates the hydrodynamics and sediment transport in a double-layered partially vegetated mobile bed channel, focusing on impact of submerged vegetation with submergence ratio 61.53% 30.77% flow dynamics morphology. Experiments were conducted straight, tilting rectangular flume staggered double layered covering half channel width. The three dimensional time-averaged velocity components, turbulent intensities, secondary current, kinetic energy, Reynolds shear stress are measured analyzed using contour plots along outcomes reveal that induces significant momentum exchange between non-vegetated sections. In section, dampens streamwise intensity near bed, promoting deposition enhancing stability. Momentum transfer at interface strengthens shear, increasing turbulence leading to greater erosion. Negative streamwise-vertical indicates helical flow, while transverse-vertical peaks bed. Flow diversion intensifies erosion high-energy vegetation-induced drag decelerates causing transition deeper section. Double-layered rivers or canals is more effective stabilizing materials. These findings provide critical insight for river restoration management, emphasizing necessity integrated management strategies balance across heterogeneous environments.

Язык: Английский

Turbulent flow characteristics over gravel bed channel with submerged vegetation patches DOI

Saundarya Narayan Kashyap,

Bandita Barman

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

This experimental research investigates the turbulent flow dynamics in a narrow open channel with submerged finite uniform patches of flexible and rigid vegetation placed along sides at equal intervals. A Sontek FlowTracker 2.0 Acoustic Doppler Velocimeter was used to collect instantaneous velocity data evaluate essential attributes, including profiles, Reynolds shear stress, higher-order moments, bursting events. The findings indicate that maximum intensity turbulence occurs inflection point immediately above plant's canopy. Vegetation greatly affects structure, reducing zone increasing Compared upstream non-vegetation zone, depth-averaged increased by 24% canopy, diminished 19% below 12% downstream non-vegetated vegetation. For patches, 23% 25% 5% as compared zone. Quadrant analysis revealed occurrence sweeps ejections more nearer vegetated bed. Furthermore, arrangement placement were pivotal diminishing affecting momentum transfers between zones. These significantly modifies patterns, dispersing loads. enhances comprehension flow-vegetation natural channels, impacting riverbank stability ecological habitat management.

Язык: Английский

Процитировано

0
Hydrodynamics and bed morphology in a double-layered partially vegetated mobile bed channel DOI
Pritam Kumar,

Abhishek Kumar,

Anurag Sharma

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

This study investigates the hydrodynamics and sediment transport in a double-layered partially vegetated mobile bed channel, focusing on impact of submerged vegetation with submergence ratio 61.53% 30.77% flow dynamics morphology. Experiments were conducted straight, tilting rectangular flume staggered double layered covering half channel width. The three dimensional time-averaged velocity components, turbulent intensities, secondary current, kinetic energy, Reynolds shear stress are measured analyzed using contour plots along outcomes reveal that induces significant momentum exchange between non-vegetated sections. In section, dampens streamwise intensity near bed, promoting deposition enhancing stability. Momentum transfer at interface strengthens shear, increasing turbulence leading to greater erosion. Negative streamwise-vertical indicates helical flow, while transverse-vertical peaks bed. Flow diversion intensifies erosion high-energy vegetation-induced drag decelerates causing transition deeper section. Double-layered rivers or canals is more effective stabilizing materials. These findings provide critical insight for river restoration management, emphasizing necessity integrated management strategies balance across heterogeneous environments.

Язык: Английский

Процитировано

0