Articles tagged with Hydrodynamics
Engineers have discovered how zinc oxide surfaces and natural hydrodynamic churning can kill pathogens, with applications in water disinfection and airborne virus control. The technique uses reactive oxygen species to damage bacterial cell walls, making it effective against both surface and waterborne pathogens.
A team of researchers from The University of Tokyo Institute of Industrial Science has expanded our understanding of liquid behavior by describing the role of hydrodynamics in these transitions. They found that changes in density lead to hydrodynamic fluctuations, affecting domain growth and long-range interactions.
Researchers at MARVEL have generalized Fourier's heat equation, explaining hydrodynamic heat propagation in materials. The new formulation yields results that agree with experimental results on graphite and predicts the possibility of observing hydrodynamic heat transfer in diamond at room temperature.
Researchers found that hydrodynamic interactions do not explain the large discrepancy between experimental and simulated nucleation rates in hard-sphere colloids. Their simulations using a reliable model showed that neglecting these interactions led to similar nucleation rates as with hydrodynamic interactions.
Researchers at Weizmann Institute of Science have visualized electrons flowing through graphene, mimicking the flow of liquid through a pipe. This behavior has important implications for creating new electronic devices with reduced resistance.
Researchers used a novel super-resolution microscopy technique to directly observe depletion layers in polymer solutions flowing through microchannels. The study found that changes to the depletion layer dimension occurred at unexpectedly low flow rates, and hydrodynamic lift forces played a key role in this phenomenon.
A team of ecologists and aerospace engineers collaborated using Computational Fluid Dynamics (CFD) to minimize the impact of biologging devices on animals. They discovered that improving tag shape can reduce drag, allowing tags to be made slightly larger while maintaining performance.
Researchers have developed a new method to demonstrate liquid-like electron behavior in graphene, allowing for more accurate observation of hydrodynamic flow. This could lead to conduction with reduced energy loss and faster low-power devices.
Researchers model the hagfish's unique slime production, discovering it relies on hydrodynamic forces to unspool microscopic threads. This finding has implications for understanding biological gels and their applications in industries and medicine.
Large human crowds behave like fluid-like systems, where movement can be mathematically predicted using hydrodynamic theory. The study's findings suggest this approach could provide quantitative guidance in crowd management and lay the foundation for an empirically grounded theory of group behavior.
Researchers developed a physical model describing crowd movement and behavior, predicting speed information spreads through the group like waves. The generic description can accurately predict crowd flows in various settings, with little variation between groups.
Researchers analyzed particle flow from tiny projectiles colliding with gold nuclei at nearly the speed of light. The data show strong correlations between initial geometry and final flow patterns, supporting the quark-gluon plasma hypothesis.
A team of scientists has found evidence of hydrodynamic electron flow in semimetal tungsten diphosphide, a high-purity quantum material. The discovery reveals the strongly interacting nature of electrons in these materials and suggests that the conversion of energy into thermal energy is limited by quantum mechanics.
A team of scientists presents a new model explaining the effects of quantum spin on relativistic flows of quark-gluon plasma, which can flow at speeds close to light. The model considers the conservation of momentum and takes into account the spin polarization of particles.
Researchers from Poland and USA develop new model of quark-gluon plasma, finding it to be much less viscous than expected. The anisotropic hydrodynamics model shows promising results, with improved accuracy in describing the phenomenon.
Scientists investigate how water flows near superhydrophobic surfaces, finding that liquids can exhibit unusual properties like hydrodynamic slip. The research uses an atomic-force microscope to measure the slip length and develop new theories for these systems.
Researchers from NIST and Georgetown University have deciphered the mechanisms behind 'oobleck''s switch between liquid and solid states. They found that shear-thickening fluids are driven primarily by frictional contacts, with hydrodynamic forces playing a supporting role at lower concentrations.
The researchers developed a new method to increase the aggressive intensity of cavitation without increasing power. By controlling pressure at the bubble collapse region, they were able to enhance cavitation efficiency by a factor of about 100.
Researchers found that sharkskin's small, tooth-like denticles can increase hydrodynamic drag, unlike riblets which reduce drag. This discovery contradicts long-held assumptions about shark skin's functionality.
Researchers found that carbohydrate polymers control the physical behavior of vaccines and provide a protective cloud against protein denaturation. The conjugates were over 50 times larger than the protein, with flexible properties that retained the highly flexible nature of the carbohydrates.
Researchers at Harvard have advanced graphene's understanding by observing electrons behaving like a fluid, defying classical physics expectations. The findings pave the way for novel thermoelectric devices and provide a model system to explore exotic phenomena.
A new hydrodynamical simulation of the universe's visible structure, Magneticum Pathfinder, provides unparalleled insights into the cosmic landscape. The simulation covers a vast area of 12.5 billion light years, featuring unprecedented resolution and detail.
International researchers found protein machines collectively induce fluctuating hydrodynamic flows, enhancing particle diffusive motions. The proteins supply power to the system by extracting energy from nonequilibrium effects.
Researchers applied GSH to various experiments, demonstrating its suitability for describing complex granular media behavior regardless of flow speed. This approach resolves previous limitations in explaining granular material flows at low and high speeds.
Researchers at Lomonosov Moscow State University have developed a new theory that sheds light on electroosmotic flow in hydrophobic surfaces. The theory resolves long-standing paradoxes and provides explanations for phenomena like zeta potential measurements of bubbles and drops.
Researchers at Brandeis University have discovered that friction forces are nearly 1,000 times greater than previously thought at the microscopic level. This breakthrough understanding of friction is an important step toward designing next-generation microscopic and nanotechnologies.
Researchers reveal that archerfish actively control the dynamics of their water jets to hit targets at varying distances, employing a unique tool-using behavior. This adaptability has potential applications in human-built nozzles and industries.
Researchers attach DNA-coated building blocks to form structures, but simulations predicted defects. They found hydrodynamic effects play a critical role in the structures' formation, making some patterns more likely than others. This discovery improves our understanding of particle assemblies and has implications for various systems.
Researchers develop penguin-inspired propulsion system using a novel spherical joint mechanism, enabling three degrees of freedom and unlimited rotational range. The system aims to shed light on the swimming mysteries of penguins, which can accelerate from 0 to 7 m/s in under a second.
Researchers have developed a new coupled numerical hydrodynamic water quality model to simulate dynamic changes in river water quantity and quality. The model was validated in the Luan River Basin, showing accuracy requirements were met for both water level and flow data, as well as water quality characteristics.
Researchers Aparna Baskaran and Cristina Marchetti found that a uniform nematic state can be disturbed by density fluctuations associated with an upward current of active particles. This phenomenon is self-regulating and universal.
A team of scientists has imaged and explained the formation of string structures in microscopic spheres suspended in a viscous fluid under shear forces. The study revealed that these strings were perpendicular to the shear force, contrary to expectations, and were influenced by lubrication forces.
Researchers found harbor seals can track fish fins up to 35 seconds after passing, using the structure of vortices and jets in the wake. Guided by their whiskers, seals accurately detected fin direction with over 90% accuracy.
Researchers from the University of Minnesota have found that fish bodies and swimming styles evolve to optimize efficiency in their respective aquatic environments. Computational simulations revealed that fish adapt their forms and techniques to match their speeds, demonstrating the influence of water movements on fish evolution.
Researchers have discovered that dolphins' flippers exhibit aerodynamic properties similar to modern delta wing aircraft. The study found that swept-back flippers are the most efficient at generating lift, with the bottle nose dolphin's triangular flippers being the most efficient overall.
Researchers have discovered a new type of atmospheric aerosol particle called iberulite, which forms in the troposphere from mineral small grains emitted from desert soils. The iberulites can provide valuable information on environmental and paleoclimatic markers, as well as change models of radioactive transference in the atmosphere.
Researchers at Washington University in St. Louis have determined the importance of mixing in anaerobic digesters, which can produce biogas with manure waste, reducing greenhouse gas emissions and groundwater contamination. The study suggests that increasing mixing intensity is crucial for successful operations.
Researchers developed an unmanned seaplane, dubbed 'Flying Fish,' that can initiate and perform its own takeoffs and landings on water. The autonomous craft features a 7-foot wingspan and is designed for the Department of Defense's persistent ocean surveillance program.
Researchers from Universität Bonn discovered that seals can navigate through dark water by detecting the hydrodynamic trail of a fish using their whiskers. In experiments with two seals, Henry and Nick, they found that the whiskers played a crucial role in finding prey over long distances.