Articles tagged with Heat Transport
Thermal phonons can interfere with their own reflections, suggesting that heat transport occurs through wave-like phenomena. This interference could be used to modify the velocity of phonons and create energy bandgaps, leading to new materials with low thermal conductivity.
A team of researchers solved the long-standing issue of how grain boundaries affect heat conductivity in graphene thin films. They devised a technique to measure heat transfer across single grain boundaries, finding it was 10 times lower than theoretically predicted values.
Researchers at MIT developed a graphene coating that improves condenser heat transfer, potentially leading to a 2-3% overall improvement in power plant efficiency and significant reductions in carbon emissions. The coating has been shown to last for two weeks without degrading under typical power plant conditions.
Researchers have created a safer and more environmentally friendly antifreeze by combining propylene glycol with an additive that improves heat transfer. The new product is 60% more efficient than conventional formulations, making it suitable for smaller markets like the food industry.
Researchers at Ohio State University have discovered a way to control heat with magnetic fields, using acoustic phonons to steer heat magnetically. This breakthrough opens up new possibilities for energy manipulation, potentially allowing for the control of sound waves as well.
A new study has found early warning signals of a reorganisation of the Atlantic Ocean's circulation, which could impact the global climate system. The researchers used a complex model to analyze the Atlantic Meridional Overturning Circulation (AMOC), finding that these signs are present up to 250 years before it collapses.
Researchers propose a new theoretical framework to explain the transition of colloidal glasses from liquids to solids, highlighting the role of crowding effects and weak spots in the material. This work has significant implications for our understanding of glass behavior and its applications in consumer products and medical research.
A team of engineers and scientists has identified a source of electronic noise that could impact the functioning of instruments operating at very low temperatures. At around 20 kelvins, phonon modes become deactivated, allowing high-energy phonons to carry away heat and causing devices to heat up.
Ankylosaurs had a unique nasal structure that allowed them to regulate their body temperature. The long, winding passageways would have warmed the inhaled air and cooled the blood before it reached the brain. This adaptation likely helped maintain the dinosaur's stable brain temperature.
A new study by Peter M.A. Toivonen reveals that cherry producers need to understand the intricacies of production-harvest-marketing continuum to successfully move sweet cherries from growers to end consumers. The study shows that temperature management is crucial for retaining fruit quality during long-term containerized shipment, and ...
Researchers from the University of Illinois found that standard thermal models fail for nanoscale heat-transfer problems when dimensions are on the order of one micron or smaller. Heat is transported ballistically, not diffusively, and interfaces add significant thermal resistance.
The researchers created a series of 3D prototypes with boron nitride, predicting enhanced strength, toughness, and heat transfer. The 3D nanostructure offers customized applications and potential for efficient gas storage and separation.
Researchers have developed innovative sorbents using metal organic frameworks (MOFs) that can store large amounts of water vapor, offering an energy-efficient cooling method. MOFs are also being used in thermally driven heat pumps and zeolite thermal storage systems to capture waste heat and store it for later use.
The CU-Boulder toilet uses concentrated sunlight to heat human waste, disinfect pathogens, and produce biochar, which can increase crop yields and sequester carbon dioxide. The project aims to improve sanitation in developing countries, reducing deaths from food and water tainted with fecal matter.
Handling receipts without gloves for 2 hours increases urine bisphenol A concentrations, a less-studied exposure source. Gloves offer no protection against thermal paper's heat-sensitive coating.
Researchers at MIT have discovered a way to boost heat transfer using magnetic nanoparticles, which could lead to more efficient cooling systems. The system relies on a slurry of tiny magnetite particles that are attracted to the heated surface by magnets, resulting in significantly improved heat transfer.
A team of MIT researchers investigated the factors controlling boiling heat transfer from a surface to a liquid, finding that surface porosity is the most important factor. They developed methodologies for systematically depositing nanoparticles onto surfaces with controlled wettability and porosity, leading to improvements in heat-tra...
The DLMX enables educators to use modern pedagogical approaches, including cooperative and problem-based learning. It facilitates students' understanding of complex concepts like heat transfer and equation application through interactive experiments.
University of Toronto researchers have developed a new tool to measure the thermal and vibrational properties of solids, which could lead to more efficient electronic devices. The tool allows for a clearer picture of how an electronic device's ability to dissipate heat shrinks with its size.
New research published in Nature Geoscience reveals how Saturn keeps itself looking young and hot due to gas layers preventing heat from escaping. This unique layering effectively insulates the planet, preventing heat radiating out efficiently.
Researchers found that condensation on canned beverages can increase the drink's temperature by six degrees Fahrenheit in just five minutes. This is more than twice as much as it would warm in dry heat conditions, highlighting the importance of keeping condensation from forming on the outside of cans.
Researchers from the University of New Hampshire have detailed how thermoelectric power plants interact with climate, hydrology, and aquatic ecosystems. Rivers serve as
MIT researchers have developed a coated surface with nanostructured patterns that increase the heat-transfer coefficient, allowing for more efficient condensation and reducing the need for expensive manufacturing processes. The technology has been shown to improve heat transfer in industrial plants by up to 30%.
Researchers at UIUC create novel system to examine and measure nanoscale thermal conductance at material interfaces. They use molecular chains with different chemical groups to observe heat flow at the atomic scale.
Professor Artur Jaworski receives Royal Society Industry Fellowship to apply thermoacoustic technology to improve efficiency of energy sources. He aims to integrate devices into European Thermodynamics Ltd products to widen range and enhance performance.
Researchers have created an 'MRI' of the Sun's interior plasma motions, revealing that convective motions are approximately 100 times slower than previously projected. This challenges existing theories on heat transport and magnetic field generation, requiring a re-evaluation of sunspot formation and solar dynamics.
A new collaborative study between the University of Miami and Navy Postgraduate School will investigate critical oceanic processes involved in Large-Scale Eddy-Driven Patterns (LEDPs). The project aims to improve understanding of LEDPs, which can impact climate projections and transport heat, salinity, momentum, and carbon.
A new analysis of surface textures reveals that microscale roughening can improve heat transfer by more than doubling the maximum dissipation. The research found that a simple roughening of the surface improved heat transfer as much as previous techniques used to produce nanoscale patterns, and provides a theoretical framework for anal...
Researchers used sediment cores to study climate conditions during the Eemian period, which may not be a suitable analogue for current climate change. The Atlantic Ocean showed higher-than-Holocene temperature signals, while the Nordic Seas indicated cold conditions, suggesting a significant difference in oceanic circulation.
Researchers developed a new model of fluid dynamics and heat flow in human tears, revealing the cooling effect on tear film after each blink. The model accurately predicts the rate of cooling for both healthy individuals and those with dry eye conditions.
Scientists at Georgia Institute of Technology used acoustic fields to enhance heat transfer, removing vapor bubbles and suppressing insulating film formation. This led to improved boiling efficiency.
The researchers demonstrated that a single layer of atoms can disrupt or enhance heat flow across an interface between two materials. By adjusting the composition of molecules in contact with the gold layer, they observed a change in heat transfer depending on how strongly the molecule bonded to the gold.
Researchers at MIT have discovered new ways to pattern collecting surfaces to encourage droplets to form more rapidly, leading to improved efficiency in power plants and desalination systems. The findings also have potential applications in improving the performance of solar-power systems and computer chips.
A new nano-coating developed by Georgia Tech researchers doubles the rate of heat transfer in pool boiling, increasing efficiency and potential applications for electronics and energy systems. The coating enhances rewetting of the solid surface, allowing bubbles to carry away more heat.
Georgios Vatistas's Swirl Flow-Type Heat Exchanger reduces energy demands and environmental resource usage by 40 times, offering broad industrial applications.
Duke University engineers developed a way to produce thermal diodes that can transfer heat in both directions, overcoming existing limitations. The method uses self-propelled water droplets to transport heat, enabling applications in energy-efficient solar panels and compact electronics.
Researchers have developed a cloaking device that utilizes the 'mirage effect' to make objects invisible. The device uses sheets of carbon nanotubes, which can be heated to create a temperature gradient that bends light rays away from the object, making it appear invisible.
Researchers found a material that conducts heat 100,000 times better than expected, violating the Wiedemann-Franz law. This unusual separation of electron spin and charge has potential technological implications.
Research by Uppsala University has found that nerve cells responsible for transmitting heat pain are also linked to itching sensations. This discovery could lead to the development of new treatments for conditions like eczema and burns.
A new analysis suggests that a prolonged phase of low activity in solar cycle 23 could be caused by changes in the sun's conveyor belt. The study's findings provide insight into factors controlling solar cycles and may lead to improved predictions.
Scientists studied the impact of a prolonged Sun cycle on Earth's conveyor belt and found that it may have led to a longer cycle. Additionally, researchers examined how global water supply sharing affects drought vulnerability, finding that sharing water globally during times of drought can increase societal resilience.
A new approach to applying nanostructure coatings has been discovered, achieving heat transfer four times faster than uncoated surfaces. The technology has potential applications in high-tech devices and conventional heating and cooling industries.
Alan McGaughey, an assistant professor of mechanical engineering at Carnegie Mellon University, has received a three-year grant to develop theoretical and computational tools for monitoring heat generation in devices. His work aims to help the Air Force reduce heat generation in operating electronics and control mechanical system tempe...
The Constrained Vapor Bubble (CVB) experiment aims to understand heat and mass transfer operations in microgravity. It will provide valuable data for developing new cooling systems for spacecraft and electronics devices, as well as improving terrestrial heat transfer devices.
MIT researchers have confirmed a long-predicted breakdown in Planck's blackbody radiation law, allowing for increased heat transfer between objects. The discovery has significant implications for applications such as hard disk storage and energy harvesting from wasted heat.
To combat increasing cooling demands, researchers are exploring advanced cooling strategies and developing new heat transfer models. By optimizing airflow patterns and using liquid cooling, they aim to improve energy efficiency and reduce waste heat conversion into other forms of energy.
Researchers at Rensselaer Polytechnic Institute discovered that heat transfer between materials is directly proportional to their bonding strength. By simulating various surface chemistries, they created a new thermometer to measure interfacial bonding properties.
Researchers developed a new method to measure heat transport in rocks, revealing that rock conductivity varies strongly with temperature. The technique, laser-flash analysis, provides more accurate data on heat transport than conventional methods.
Researchers are developing smart nanostructures that can regulate reactions, momentum, and heat transfer in chemical reactors. These responsive systems could make measurement systems redundant and eliminate the risk of runaway reactions.
Scientists recreated materials at extreme pressures and temperatures, revealing rare atomic properties that may affect heat transfer, superplume formation, and seismic wave speed. This discovery requires reinterpreting seismic images of the lowermost mantle.
Researchers at Rensselaer Polytechnic Institute have developed a new nano technique that significantly enhances boiling efficiency by up to 30 times. This breakthrough has the potential to revolutionize cooling methods for computer chips, improve heat transfer systems, and reduce energy costs in industrial applications.
A team led by Kevin Pipe will use ultrafast lasers and nanotechnology to regulate the flow of heat between materials, benefiting applications such as high-power electronics and thermoelectric energy conversion. The research aims to improve efficiency and reliability in devices.
A team of researchers from the University of Illinois has developed an ultrafast thermal measurement technique capable of exploring heat transport in extended molecules. The study found that heating a molecule can cause its atoms to shake and twist, and that heat moves ballistically through the molecule at a constant velocity.
Researchers have developed a tiny, cold, and efficient cryogenic refrigerator operating at 120 cycles per second that achieves rapid cooling and low temperatures without moving parts. The device uses oscillating helium gas to transport heat, enabling faster cool-down and smaller size.
A recent NASA study found that clearing for mechanized cropland has become a significant force in Brazilian Amazon deforestation. The study suggests that the conversion of forests to croplands can have a more pronounced ecological and climate impact than other land conversions.
Researchers at Ohio State University found that a vapor layer forms between hot particles and cold droplets, allowing them to bounce off each other without touching. This discovery can lead to more efficient heat transfer in industries such as oil refining, boosting efficiency and reducing costs.
The project seeks to develop nanostructured composite materials with controlled thermal conductivity, impacting technologies like thermoelectric coolers and power electronics. Huxtable plans to educate underprivileged students through a summer research program.
Researchers at NIST have developed a method to improve the efficiency of water chillers in large commercial buildings. By adding small amounts of oil additives to refrigerants, they claim to increase cooling capacity similar to a heat pump.
Researchers estimate that excess fresh water entered the North Atlantic Ocean, causing salinity changes and potentially slowing the ocean conveyor. The study suggests that a freshening threshold could be reached in a century, affecting heat transport and climate.
Scientists have found evidence of rapid climate change in the North Atlantic, but contradicting measurements exist for the Southern Hemisphere. The new study provides detailed information on ocean surface temperature off Chile, consistent with Antarctic ice core data.