Articles tagged with Fluid Mechanics
A research group at Tohoku University has overturned the long-standing assumption that smoother surfaces produce less aerodynamic drag. By applying Distributed Micro-Roughness, they achieved a world-first experimental demonstration of up to 43.6% drag reduction.
A new study finds that a slowing Atlantic Ocean current will strengthen powerful storms in California while reducing snowfall over Greenland. The Atlantic Meridional Overturning Circulation's weakening is projected to increase atmospheric moisture and high-altitude winds, creating more destructive atmospheric rivers.
Researchers developed a unified theoretical framework for ultrasound wave propagation and energy dissipation in porous rock formations. The study identifies three distinct longitudinal-wave types with different physical origins, providing a basis for understanding and predicting ultrasonic wave behavior in multiphase porous media.
Researchers at RCSI University of Medicine and Health Sciences have developed an artificial model of the mitral heart valve that faithfully mimics its complex mechanical behavior. The study could help researchers better understand valve disease and develop new treatment approaches.
A recent study using motion-capture and particle image velocimetry reveals that the flutter kick generates three-dimensional vortex structures contributing to forward propulsion. The alternating leg movements also produce asymmetric vortices, generating rolling and yaw moments that stabilize body posture during swimming.
Researchers discovered that ultrasoft elastic materials generate a V-shaped wake similar to boat wakes, blurring the distinction between wave behavior on solids and fluids. This finding could lead to new approaches for soft-tissue diagnostics and understanding the properties of natural and engineered soft materials.
Researchers at OIST and University of Turin developed a general formulation for mixing heavy particles with fluid, enabling study of fundamental physics phenomena and applied research in fluid engineering. Simulations reveal the formation of sediment plumes and the role of friction in particle interactions.
Researchers from The University of Osaka developed a novel device to harness wave power, achieving high energy absorption efficiency across broadband frequencies. By tuning gyroscopic parameters, the device can maximize performance, providing a roadmap for developing adaptable and efficient wave energy converters.
Direct-ink writing (DIW) technology faces unique physics puzzles, requiring a balance between liquid-like and solid-like behavior. The review aims to stimulate fundamental work on the central challenges of DIW, enabling more reliable and precise processes.
The study reveals that torque maximization arises from both direct collisions and pressure imbalances in gas-liquid interface waves. This phenomenon is significant for energy savings and optimal design in complex industrial equipment, such as power transmission devices, cooling systems, and chemical agitators.
Scientists from Tokyo Metropolitan University have re-engineered the Lattice-Boltzmann Method to store certain data, reducing memory usage and overcoming a key bottleneck. The new algorithm achieves significant accuracy and stability in simulations of fluids and heat.
Brazilian researchers have developed a technique that estimates the force exerted on each grain of sand in a dune from images, enabling the study of previously unmeasurable physical processes. The method uses numerical simulations and artificial intelligence to transform the study of granular system dynamics.
Researchers from Poland, USA, and Slovenia found a mathematical description of stalagmite shapes, revealing that shape matters for climate science. The study provides an analytical solution for the growth of ideal stalagmites in constant cave conditions.
Dr. Bueno, a lead engineer at SwRI's Computational Mechanics Section, has been recognized for his work on supersonic and hypersonic aerodynamics, turbulence, and renewable energy. He developed patented heat storage systems and advanced optical diagnostic imaging tools to study high-speed flows.
Researchers have discovered that soft gels and lotions retain residual stress from the mixing process, affecting their behavior over time. The study reveals that common products like hair gel and shaving cream hold onto these stresses for longer periods than previously assumed.
Researchers develop a novel analytical method to capture localized structures and reveal the intertwined behavior of multiple fluctuating fields. They introduce two new measures based on information entropy, which quantify structural complexity and degree of coupling between turbulent structures.
A team of scientists from the University of Warsaw discovered that karstic solution pipes preserve a record of Earth's climatic history. The pipes evolve into an invariant shape as they deepen, encoding ancient rainfall patterns.
The team developed a demonstrator to optimize water treatment plant operation through full-scale tests at CIRTESU. The system simulates processes, measures water velocity and turbulence, and analyzes mixing effects.
Researchers developed a new equation to predict seismic wave propagation in magma containing crystals and bubbles, revealing how crystal content influences wave velocity and waveform properties. The analysis also showed that bubble content affects attenuation effects, with discernible differences emerging between models.
Researchers at Pohang University of Science & Technology and Jeonbuk National University successfully trapped mechanical waves within a single resonator, overcoming a century-old physics barrier. The discovery opens new possibilities for energy harvesting, ultra-sensitive sensors, and advanced communications.
Computer simulations show that captured CO2 can be permanently stored underground by mixing with groundwater, creating a denser liquid that sinks and remains there. Suitable geological conditions, such as impermeable rock layers and porous aquifers, are necessary for effective CO2 storage.
A new study from York University combines fluid mechanics and chemistry to understand the Earth's early evolution. Researchers found that the lower mantle's structure was established four billion years ago, with most crystals forming at low pressure, leading to a different chemical signature than previously thought.
Researchers from Uppsala University found that lymphatic endothelial cells have a lobate shape due to their capacity to change shape and increase overlap between cells. This shape supports resilience to changes in fluid volume and is also found in plant leaves.
Virginia Tech researchers Pamela VandeVord and Gunnar Brolinson received a $2.17 million grant to investigate cranial osteopathic manual manipulation as a potential treatment for traumatic brain injury symptoms, particularly headaches. The noninvasive technique aims to enhance brain fluid motion and balance the autonomic nervous system.
The UMass Amherst nurse-engineer team, led by Elaine Marieb Center for Nursing and Engineering Innovation, has developed an innovative IV pole designed to enhance patient safety and reduce errors. The award-winning design features a smart pump that can detect potential problems and alert medical staff, improving overall care.
Ebru Demir aims to study how groups of AI-driven microswimmers move in biological fluids for potential applications in drug delivery, fertility treatments, and other medical fields. Her research combines artificial microswimmers with machine learning to uncover the underlying physics governing their movement.
A new study by Rice University and Vanderbilt University researchers found that combining focused ultrasound with the existing protein therapy TRAIL can significantly reduce tumor size and burden in prostate cancer models. The therapy works by amplifying the anticancer effects of TRAIL via Piezo1 activation, which triggers cell death.
Researchers have developed an embedded 3D-printing technique that allows for the rapid production of fine, continuous, and soft fibers in gel. The method uses a solvent exchange approach to inhibit capillary breakup from surface tension, achieving resolutions as low as 1.5 microns.
A UVA professor has made new discoveries about electron kinetic behavior within plasma beams, potentially revealing the 'shape' of future space technology. The findings could lead to more efficient and reliable electric propulsion systems for long-duration space missions.
Researchers developed a soft robot with fins shaped like manta rays, capable of swimming up and down throughout the water column. The robot uses spontaneous snapping-induced jet flows to achieve high speeds and maneuverability.
A team of physicists studied the unique motion of Champati seeds rolling down slopes, revealing a spread-out, then collapse-like behavior akin to rock avalanches. The research may provide valuable insights into geological flows and contribute to resolving challenges in this area.
Scientists will present new research on bio-inspired floating offshore wind farms, harbor seals' whisker sensing abilities, and Manu jumping. The conference features over 300 sessions and nearly 2,800 presentations.
In transport networks, competing branches change dynamics drastically when reaching the system's boundary, forming loops. This process leads to increased stability and reduced damage susceptibility. Various systems exhibit similar dynamics, supporting a simple physical explanation for loop formation.
A team of researchers from the University of Washington has developed a flexible pipe with an interior helical structure inspired by shark intestines, which can keep fluid flowing in one direction without flaps. The design rivaled and exceeded Tesla valves, a one-way fluid flow device invented over a century ago.
A team of UBC Okanagan researchers has created a new mechanical heart valve that combines the strengths of both mechanical and tissue replacement technologies, offering improved performance and durability.
Researchers developed a novel approach using intestinal organoids to study gastrointestinal motility. They found EEC stiffness values ranging from 60 to 70 pN/μm and demonstrated changes in EEC stiffness upon TDO2 inhibition.
Elastic turbulence, a chaotic fluid motion in non-Newtonian fluids, exhibits universal power-law decay of energy and intermittent behavior. This study reveals its unexpected similarity to classical Newtonian turbulence, paving the way for developing a complete mathematical theory and predicting flow patterns.
A team from UPV has developed an AI technique to study turbulence, a key factor in energy dissipation and CO2 emissions. The method uses a neural network to predict turbulent flow movement and reproduce existing knowledge without prior physics knowledge.
Researchers developed a test to predict which heart attack patients are likely to experience dysfunction after receiving mechanical pumps. The test measures pulmonary vascular compliance and its adaptability, helping doctors prevent right ventricle failure.
Researchers studied how epithelial cells sense small changes in their environment using ion channels. They found that even small movements can trigger rapid intracellular calcium changes via mechanosensitive cation channels, which play a key role in touch sensation and other physiological functions.
Researchers analyzed 17th and 18th century firefighting devices to uncover the physics behind their success. The study found that the Windkessel effect, a chamber in a wooden wagon, compressed air to pump water continuously through a hose.
The study found that pressure forces at the cork's base control its motion, with friction forces playing a decisive role. The researchers also discovered the formation of Mach discs, which can be used to determine gas pressure or temperature inside a champagne bottle.
A Brown University research team investigated belly flop mechanics, finding that flexible impactors can sometimes increase the maximum impact force on the body, contradicting conventional thinking. The study's findings have implications for naval and marine engineering applications.
Scientists at Lancaster University have discovered that superfluid helium-3 behaves like a two-dimensional system when probed with mechanical resonators. This finding has significant implications for our understanding of superfluidity and its potential applications in various fields.
Researchers at Queen Mary University of London developed a new organ-on-a-chip model of the human synovium to study arthritis mechanisms and develop new treatments. The three-dimensional microfluidic device successfully replicates key features of native synovium biology.
A new biomimetic chip has been developed to simulate the human gastric mucosa, combining organoid and organ-on-a-chip technologies. The biochip replicates mechanical stimulation and cell-to-cell interactions, mimicking key features of the human stomach's defense mechanisms.
Researchers at the University of Pittsburgh have developed a system that uses fluid mechanics and chemo-mechanical processes to autonomously assemble hierarchical 3D structures. The system utilizes sticky bonds to drive self-organization, allowing for the construction of complex devices with minimal external intervention.
A University of Central Florida engineer is leading a $3.3 million ARPA-E funded project to develop simulation software for floating offshore wind turbines. The goal is to improve turbine design and increase their use as a renewable energy source. The software will be licensed or commercialized and can be hosted on a university web page.
Rensselaer Polytechnic Institute researchers are using the ring-sheared drop module on the International Space Station to study protein solutions in microgravity. This research will aid in developing predictive models for both fundamental science and industry, including pharmaceutical development.
Researchers from the University of Warsaw explore how kitchen phenomena lead to breakthroughs in biomedicine and nanotechnology. They describe bubbles in champagne, Leidenfrost effect, and surface tension, revealing surprising connections between food science and scientific discoveries.
The new design improves detection sensitivity and reduces response time by controlling fluid flow, promoting uniform VOC concentration. The authors plan to further optimize the chamber structure for ultrasensitive volatile sensing.
Researchers used fluid dynamics models to study the mountain pine beetle's flight, finding that wing shape, age, and size impact thrust production. This knowledge can improve statistical confidence levels for insect dispersion studies and help preserve pine forests.
Researchers from Brown University and the University of Toulouse found that surfactants make Champagne bubble chains stable. The experiments showed that larger bubbles and surfactants help reduce tensions between liquid and gas, creating a smooth rise. This discovery has implications for understanding bubbly flows in fluid mechanics.
A new metric called a correlation ratio has been developed to correlate microscopic-level processes with macroscopic-level behavior in soft materials. This breakthrough allows for the design of new soft materials by tweaking microscale parameters to achieve desired macroscale properties.
Researchers used fluid dynamics to model blood drop behavior during secondary atomization, finding smaller droplets are easier to sweep up by firearm gases. This discovery could explain how short-range shooters remain clean from blood stains.
Researchers found that traditional handmade clay jars, called onggi, ferment kimchi faster and produce more beneficial bacteria due to their unique porous structure. The study highlights the connection between the earthenware's material properties and the fermentation process, providing new insights into ancient technology.
A WPI researcher is leading a three-year project to investigate the effects of stretching and blood flow on cardiovascular cells in tissue-engineered heart valves. The project aims to expand understanding of mechanical forces that propel cells in the body, with potential applications in other fields like cancer and wound healing.
Researchers study DNA minicircles using hydrodynamic measurements to understand their behavior under twisting, revealing unique shapes and compactness. The investigation combines theoretical approaches with experimental methods to elucidate dynamic hydroelastic effects in DNA.
A team of researchers has discovered new laws governing fluid flow through experiments on drinking straws, defying previously known resistance laws. The findings have promise for improving fluid handling in medical and engineering applications.