Vortex Stability
Vortex Stability - Related Videos
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.
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).
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...
03:18
Nuclear Stability
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2020
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters. To hold positively charged protons together in the...
01:53
RNA Stability
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2019
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
FAQs
These quantities establish the organized motion and internal force balance within a rotating fluid structure. Circulation characterizes the strength of rotation, while pressure gradients and centrifugal forces act together to shape the flow. If their balance resists a disturbance, the vortex can remain organized; if the balance is disrupted, perturbations may persist or develop into larger instabilities.
Viscosity and shear affect how disturbances evolve within and around a vortex. Viscosity contributes to the flow conditions that determine whether perturbations decay or remain significant, while shear can alter the response of neighboring fluid regions. Examining both helps engineers distinguish conditions associated with stable motion from those that may produce unsteady behavior.
Engineers assess the vortex response by examining how small perturbations interact with circulation, pressure gradients, centrifugal forces, viscosity, and shear. The resulting behavior indicates whether the disturbance weakens, remains present, or develops into an instability. Theoretical models, computational fluid dynamics, and experimental flow measurements provide complementary ways to evaluate these responses.
A typical analysis begins by identifying the relevant rotating flow and its governing balance of forces and fluid effects. Engineers then apply a theoretical model, simulate the flow with computational fluid dynamics, or measure it experimentally. Comparing the predicted and observed disturbance responses helps characterize stability and identify conditions linked to unsteady loading, vibration, or energy loss.
The analysis supports several systems in which rotating or vortical flow affects performance. Applications include turbomachinery, propellers, combustors, aircraft flow controls, and mixing systems. In these settings, identifying unstable or poorly controlled vortex behavior can guide designs intended to reduce unwanted vibration, energy loss, noise, and unsteady loading.
The analysis can reveal whether flow disturbances are likely to decay, persist, or grow, giving engineers information about the steadiness of a system's fluid motion. Those findings help connect flow behavior with practical performance concerns, including vibration, noise, energy loss, and unsteady loading. Designers can then use theoretical, computational, or measured results to evaluate alternative system configurations.