Vortex Shedding
Vortex Shedding - Related Videos
02:02
Quantifying Bacterial Shedding to Evaluate Infection Transmission Potential in Drosophila
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2026
Source: Siva-Jothy, J. A., et al., Oral Bacterial Infection and Shedding in Drosophila melanogaster. J. Vis. Exp. (2018)This video demonstrates the procedure for monitoring bacterial shedding in Drosophila by transferring an infected fly across multiple food-containing tubes, recovering shed bacteria, and quantifying viable colonies through serial dilution and plating.
06:35
Implementation of a Hyperbolic Vortex Plasma Reactor for the Removal of Micropollutants in Water
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2025
This study presents the methodology for the generation of six different types of plasma discharges within a Hyperbolic Vortex Plasma Reactor for the degradation of micropollutants in water, including pharmaceuticals and per- and polyfluoroalkyl substances (PFAS).
10:51
Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
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Cited by 2 •
2014
A microfluidic vortex assisted electroporation platform was developed for sequential delivery of multiple molecules into identical cell populations with precise and independent dosage control. The system’s size based target cell purification step preceding electroporation aided to enhance molecular delivery efficiency and processed cell viability.
09:32
Oral Bacterial Infection and Shedding in Drosophila melanogaster
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Cited by 40 •
2018
This protocol describes methods to orally expose and infect the fruit fly Drosophila melanogaster with bacterial pathogens, and to measure the number of infectious bacteria shed following gut infection. We further describe the effect of immune mutants on fly survival following oral bacterial infection.
07:01
Flow Visualization in a Water Tunnel: Observing the Leading-edge Vortex Over a Delta Wing
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2023
Source: Jose Roberto Moreto, Gustaaf Jacobs and Xiaofeng Liu, Department of Aerospace Engineering, San Diego State University, San Diego, California The delta wing, shown in Figure 1D, is a popular design in high-speed airplanes due to its superb performance in transonic and supersonic flight regimes. This type of wing has a small aspect ratio and high sweep angle, which reduces drag at high subsonic, transonic and supersonic flight regimes. The aspect ratio is defined as the wing span divided...
FAQs
The Strouhal number provides a way to relate shedding frequency to flow speed and the body size. Using that relationship, engineers can anticipate how changes in operating speed or obstacle dimensions may shift the alternating vortex pattern. This estimate helps identify conditions where oscillating forces could become important in design.
Boundary-layer separation initiates the alternating wake pattern by allowing swirling flow to detach from opposite sides of the immersed body in sequence. Because the release is not steady or symmetric, it produces oscillating lift rather than a constant side force. Engineers therefore examine separation when assessing vibration, fluctuating loads, and potential noise.
When the shedding frequency aligns with a structure’s response, the resulting oscillating lift can promote resonance. Repeated vibration under those conditions may contribute to fatigue and, in severe cases, structural failure. This is why vortex shedding matters for exposed components such as bridge elements, chimneys, cables, and pipelines, not only for their surrounding flow.
Engineers relate the observed flow behavior to the body’s size and the moving fluid’s speed, then examine associated forces, vibrations, and noise. The same assessment can be applied to bridges, chimneys, cables, aircraft components, or pipelines. Comparing these effects across operating conditions helps reveal whether shedding could affect safety, durability, or aerodynamic and hydrodynamic performance.
Because shedding frequency is related to flow speed, body size, and the Strouhal number, a monitored shedding pattern can provide information about the moving fluid. In engineering applications, this relationship turns a wake phenomenon into a flow-measurement principle. Its usefulness depends on interpreting the frequency together with the relevant body dimensions and flow conditions.
Analysis can guide safer designs by identifying conditions associated with fatigue, resonance, or structural failure. It also informs vibration control and can help engineers improve aerodynamic or hydrodynamic performance. For aircraft components and other fluid-exposed systems, the study connects wake behavior with practical concerns involving forces, vibrations, and noise.