During the brewing process of an espresso, hot water flows through a cylindrical filter that is densely packed with coffee grounds. Along the way, chemicals are extracted such that the liquid leaving the filter is not pure water anymore, but espresso. The concentration of dissolved chemicals in the liquid that comes out of the machine is the quantity of interest in a wide range of mathematical models for espresso brewing.
Daniel Chung – University of Melbourne has recently been appointed as an editorial board member of the Journal of Fluid Mechanics. To celebrate, they participated in a Q&A with the Journal.
Members of the Flow Editorial Board have each selected one recent article to highlight as an example of the best and brightest being published in the journal.
Magnetic fields are at the core of many imaging technologies. A widely known modality is MRI, a standard procedure in medical imaging, which is however limited by a long scanning time and the ability to only image anatomical regions containing sufficient amounts of water. The more recent magnetic particle imaging (MPI) instead promises functional images of the dynamics of nanoparticle tracers with high temporal resolution.
Prof.-Dr. Shijun Liao – Shanghai Jiao Tong University has recently been appointed as an editorial board member of the Journal of Fluid Mechanics. To celebrate, Shijun Liao participated in a Q&A with the Journal.
JFM Rapids is a well-established section in JFM that continues to provide a highly visible venue for short, high-quality, articles addressing timely research challenges of broad interest. The Rapids editors have selected the most interesting recent articles to inspire and motivate your submission.
Business Analytics, a new textbook from author and professor Richard Huntsinger is uniquely designed for both the business-oriented and data science-oriented student.…
2024 JFM-Flow China Symposium: from fundamentals to applied mechanics, was an a landmark event co-hosted by the School of Aeronautic Science and Engineering at Beihang University, Beijing and arttended by 160 local experts and 3000 online viewers in China.
JFM Rapids is a well-established section in the JFM that continues to provide a highly visible venue for short, high-quality, articles addressing timely research challenges of broad interest. The Rapids editors have selected the most interesting recent articles to inspire and motivate your submission.
Understanding the evolution of nature through a model describing collaborative population dynamics of plants and insects.
Lian-Ping Wang, Southern University of Science and Technology in China has recently joined the Journal of Fluid Mechanics Editorial Board for JFM Rapids. To celebrate, Lian-Ping Wang participated in a Q&A with the Journal.
"Swarm intelligence," a term that abstractly captures the collective tendency to facilitate consensus formation by exchanging information within groups of individuals, whether they are animals, humans, or even artificial agents.
The first best paper prize will recognise an Emerging Scholar who published work in 2023 and the winner will be announced later this year.
Tamer Zaki (Johns Hopkins University) has recently joined the Journal of Fluid Mechanics Editorial Board for JFM Rapids. To celebrate, Tamer participated in a Q&A with the Journal.
Sergio Pirozzoli of Sapienza University of Rome has recently been appointed as an editorial board member of the Journal of Fluid Mechanics. To celebrate, Sergio participated in a Q&A with the Journal.
Professor Yongyun Hwang, Imperial College London has recently been appointed as an editorial board member of the Journal of Fluid Mechanics. To celebrate, Yongyun participated in a Q&A with the Journal.
Read the press release online: https://www.eurekalert.org/news-releases/1032091
How does mistletoe grow? How does mistletoe spread? And, curiously, how does this link to the latest mathematical research?
A spotlight on JFM Rapids, a well-established section in the Journal of Fluid Mechanics [JFM] that continues to provide a highly visible venue for short, high-quality, articles addressing timely research challenges of broad interest. In this collection, the Editors of JFM Rapids each explain why they selected one article that presents exciting results with exceptional impact on currently active fluid mechanics research.
The Covid-19 pandemic thrust mathematical modelling into the spotlight like never before. As governments around the world scrambled to respond to the crisis, infectious disease models became a crucial strand of evidence, allowing us to measure transmission and evaluate the likely outcome of alternative response options.…
In the following video, Professor Barton Smith of Utah State University explains his work on the fluid dynamics of a baseball pitch.…
Professor Colm-cille Caulfield, Editor-in-Chief of Journal of Fluid Mechanics (JFM) discusses his first published paper in JFM. Multiple linear instability of layered stratified shear flow Colm also give us insight into changes that have occurred in the publishing process, over the past 30 years.
Straws can make drinking easier, but modelling the flow in them can be hard; doing so successfully could help scientists across disciplines better understand a range of complicated systems.
Professor Colm-cille Caulfield, Editor-in-Chief of Journal of Fluid Mechanics (JFM) discusses his career. Colm discusses common themes in his research. As well as his favourite fluid type. Colm also give us insight into his favourite JFM paper, and advice for students and authors.
Suspended particles make fluid flows complicated. If particles are attractive, aggregates can grow and shrink dynamically adding another level of complexity. A recent Tutorial Review in FLOW breaks down the way researchers try to understand these systems.
Introducing a mathematical model for pedestrian dynamics that is based on social forces between pedestrians in exemplary hallway or crossing situations.
We were excited to hold the JFM/FLOW 2023 China Symposium in Hefei in July 2023
Professor Colm-cille Caulfield discusses his first year as Editor-in-Chief of the Journal of Fluid Mechanics (JFM). Colm discusses his expectations of being Editor of the journal, what helped him prepare to take on the role and what policies he is personally proud to be a part of steering.
Blues fans out there may be familiar with the Led Zeppelin classic ‘When the Levee Breaks’, but what about when the levee forms? In particular, how do natural levees form in such an organised and well-engineered process?
Moduli Managing Editors introduce the new open access mathematics journal owned by the Foundation Compositio Mathematica, published in collaboration with the LMS and Cambridge University Press.
Machine learning models, particularly those based on deep neural networks, have revolutionized the fields of data analysis, image recognition, and natural language processing. A key factor in the training of these models is the use of variants of gradient descent algorithms, which optimize model parameters by minimizing a loss function. However, the training optimization problem for neural networks is highly non-convex, presenting unique challenges.
Q&A with Luciano Rezzolla about his upcoming Cambridge Festival event
Pi Day is celebrated around the world on the fourteenth day of the third month (3/14). The date representation of 3.14 is the most basic ratio of the circumference of a circle to its diameter. We've collated the top 10 most read papers from 2022 in Forum of Mathematics, Pi for all mathematicians, from researchers to students.
Eugenia Cheng, Author of The Joy of Abstraction, answers 3 questions for International day of Women and Girls in Science
The PageRank algorithm was developed by Google co-founder Larry Page, and first introduced in 1998. It is based on the idea that a website’s importance can be measured by the number of other websites that link to it. Here, EJAM researchers study the PageRank algorithm.
The John Ockendon Prize launched in 2016 and is named after the founding editor of the European Journal of Applied Mathematics. This award recognises researchers for their contribution to applied mathematical research. In this article, Journal Editor Martin Burger discusses the 2022 winning paper.
Rahil Valani (Monash University) explains how superwalking droplets form when a bath of oil is vibrated at two different frequencies, and how this phenomena is related to quantum theory and wave-particle duality. Research by Rahil Valani at Monash University
The Lutetium Project film a water droplet impacting on a superhydrophobic cone-shaped surface and the results are breathtaking. Research by Pierre Chantelot at the University of Twente.
A study on duck swimming behaviour published in JFM secures the 2022 Ig Nobel prize in physics for Zhi-Ming Yuan, Minglu Chen, Laibing Jia, Chunyan Ji and Atilla Incecik
September 16th 2021 marked the 34th anniversary of the Montreal Protocol, one of the most successful climate initiatives in United Nations history.…
When a hydrogel bead is dropped onto a water droplet the fluid is lifted up from the surface creating some incredible structures such as the ‘reverse crown’ and the ‘dancing ballerina’.…
Why does cotton candy disintegrate in air? What happens when you add droplets to candy floss? And how is it made in the first place?…
When a drop of salty water is evaporated on a hydrophobic surface, “salt globes” that mirror the shape of the drop grow.…
Tom Mullin at the University of Oxford introduces some of his favourite fluid dynamics experiments… covering a wide range of fluid mechanics phenomena including turbulence, wave formation, Rayleigh-Taylor instability, viscous effects, magnetism, electricity, segregation, disorder and chaos.…
Our bodies are complicated networks. Our vasculature – the veins, arteries, and capillaries that shuttle blood, oxygen, and nutrients to every part of us – is itself a complex series of interconnected tubes that span a wide range of length scales.…
We were excited to hold the JFM/FLOW 2022 China Symposium in Xi’an in June 2022. This is the second time Journal of Fluid Mechanics (JFM) has held a symposium in China but the first which included our new journal Flow. …
In power networks with increasing shares of sustainable energy resources such as wind and solar radiation, the supply of energy is subject to natural fluctuations.…
About the Mahony Neumann Room Prize This prize, for outstanding contributions to the Australian Mathematical Society’s research publications, is fittingly named after the founding editors of these journals.…
Cytotoxic T lymphocytes (CTLs) belong to our bodies’ most effective weapons in the fight against distorted cells, such as cells infected by viruses or cancer cells.…
The phenomenon of spontaneous isothermal phase separation in a binary alloy is described mathematically by the Cahn-Hilliard equation. It is named after John W.…
On July 25th, 2021, a wall of sand engulfed the Chinese city of Dunhuang. As the dust rolled in, the air in the city took on a nearly opaque burnt orange hue that made travel practically impossible.…
The following was written by Gerard van der Geer, President of the Foundation Compositio Mathematica. Additional history of the Prize as well as a list of past winners can be found here.…
Figure 1. A late-18th century lens grinding lathe made by Andrea Frati. This device currently resides at the Museo Galileo – Institute and Museum of the History of Science The device above might not look familiar, but the object it produces (or used to produce) probably would.…
When Alban Sauret and his colleagues at FAST laboratory tried to create a tsunami in a lab setting, it would be fair to say they had their work cut out.
A recent study in the Journal of Fluid Mechanics has tried to understand and model the role of porosity present in the birds' wing on the combined aerodynamic and acoustic performance.
A new study in the Journal of Fluid Mechanics by an international team of scientists is on the cutting edge of research.
Are you passionate about fluid mechanics and its applications? Are you looking to develop your writing skills and engage with an audience that's just as enthusiastic on the subject as you are? We have the competition for you.
About the Mahony Neumann Room Prize This prize, for outstanding contributions to the Australian Mathematical Society’s research publications, is fittingly named after the founding editors of those journals.…
Stefan problems are a special type of partial differential boundary value problems, introduced around 1890 by the Slovenian physicist Josef Stefan [1].…
Experiments visualising the airflow when breathing, speaking and laughing, show that wearing a mask indoors can drastically reduce the risk of transmission of airborne particles.…
The tail (flagellum) of the sperm does not simply push the body, but uses a rhythmical beating with pushing and fraying over a 4-beat pattern, as demonstrated in the video.…
When navigating strong crosswinds birds adjust the angle of their body into the wind, whilst keeping their head fixed on the target destination, in order to maintain forwards motion.…
Current underwater vehicles are either difficult to manoeuvre making them unsuitable for sensitive work, or are extremely expensive. Gabe Weymouth and his team at the University of Southampton are designing new underwater robots based on the Plesiosaur – the dinosaur behind the legend of the Loch Ness Monster – which are much smaller, cheaper and more energy efficient.…
From rotating impellers stirring air into a liquid, to a turbulent jet entering a moving flow, mixing processes are essential to almost every industrial application you can think of.…
When an object, such as an aircraft or submarine, moves through a fluid it generates a ‘wake’ behind it which can be used by monitoring tools to detect its size and position.…
When catching prey underwater snakes use two main techniques: the frontal strike and the lateral strike. By studying real snakes in the lab at ESPCI/MNHN, Marion Segall was able to recreate the setup using a 3D-printed snake head and laser visualisation techniques, which allowed for the forces involved in each strike to be measured.…
The European Journal of Applied Mathematics and Cambridge University Press are pleased to award the 2020 John Ockendon Prize to B.…
Higher Education from Cambridge University Press is our new online textbook website, launched in August 2020. In recent months Cambridge University Press has introduced a new set of strategies to support changing teaching and learning needs as higher education institutions prepare for a more digitally driven future in the wake of pandemic.…
The manufacturing process for toothpaste involves mixing together several fluid and solid components to create the non-Newtonian polymer used to clean your teeth.…
Termites live underground in termite mounds to protect themselves from the heat of the desert, but how do they keep their mounds cool?…
Before a tornado forms the pressure drop at the centre emits a dull tone at 5-10Hz which can be detected hours before it becomes dangerous.…
Let’s face it – stepping (sitting) in front of a camera has become a staple component of working from home during the global pandemic.…
Congratulations to Alexander J. Smits on being awarded the 2020 Batchelor Prize ‘for seminal contributions to our understanding of the structure of wall turbulence at very large Reynolds and Mach numbers, especially through the design of innovative experiments and measurement devices, and also for pioneering work on bio-inspired propulsion and on drag reduction using modified surfaces’.…
Many of us are discovering that working at home for a long stretch can be difficult. Staying productive and motivated is a challenge, and it is not always easy to find a routine to keep things running smoothly.…
Rogue Waves occur when a larger wave appears in a group of smaller waves. In some circumstances these can lead to an exaggerated ‘Spike Wave’, or a crashing wave resembling the Great Wave off Kanagawa by Hokusai.…
Alice of ‘wonderland’ and ‘looking glass’ fame is a creation of mathematician Charles Dodgson, better known by his pseudonym Lewis Carroll.…
Star-nosed moles are able to smell underwater by quickly exhaling and re-inhaling air bubbles as they search for prey. The bubbles are trapped close to the moles nostrils by a ring of tiny pink tentacles, which gives rise to the name ‘star-nosed’.…
International Women’s Day 2020 falls on Sunday, 8th March this year. In the run up to this date, each week day we’ll be highlighting one woman whose accomplishments in science, technology, engineering and/or mathematics not only elevated their fields but also took us one step closer to a gender-equal world.…
Jellyfish stingers reach an acceleration 50 times faster than that of a bullet as they are ejected from stinging capsules under high pressure.…
Sets are ubiquitous and familiar: children get acquainted with sets of objects surrounding them very early on; secondary school students typically encounter sets of natural numbers and sets of real numbers in their maths curriculum. …
This is the latest of an ongoing series of interviews with people involved with our new Open Access journal, Experimental Results – a forum for short research papers from experimental disciplines across Science, Technology and Medicine, providing authors with an outlet for rapid publication of small chunks of research findings with maximum visibility.…
The Coconut Rhinoceros Beetle is an invasive species that if left alone would decimate citrus crops across California. To prevent this from happening, John Allen and his team at the University of Hawai’i have been working to hunt the insects down before they are able to reach the West Coast of the USA.…
The leaves of stinging nettles are covered in ‘pipette-like’ stingers which penetrate the skin on contact and deposit a small amount of poison.…
There is no doubt that sea ice in the polar regions is melting, but what is the exact role that this plays in the global climate system?…
One of the clean-up methods used following an oil spill is to burn the fuel on the surface of the ocean.…
The flow of air around a sail is very different to that of a wing, but both generate significant lift force.…
Cyclists can use up to 90% of their energy overcoming drag, which was the motivation behind the work of Ivaylo Nedyalkov at the University of New Hampshire, who was able to measure the force on each individual cyclist in a train formation to determine the best position to reduce your overall drag.…
Silicosis is lung disease caused by the inhalation of respirable dust that contains quartz or similar particles. These particles can embed themselves deeply in the lung and the reaction of the tissue is called silicosis.…
The Batchelor Prize for 2020 is awarded to Professor Alexander J Smits, Eugene Higgins Professor of Mechanical and Aerospace Engineering, Princeton University
By improving our understanding of turbulent flow over canopies we can design better cities to improve air quality. This is just one of the applications of the work of Alfredo Pinelli, a professor at City University of London working on Large Eddy Simulations (LES) of turbulence.…
Current underwater vehicles are rigid in structure which limits their suitability for many tasks required for ocean exploration. Francesco Giorgio-Serchi is working with a team at the University of Southampton to design new robots based on squids and octopuses that are made entirely from silicone.…
Removing water from your ear canal by shaking requires an acceleration 10 times that of gravity according to research from Sunny Jung at Virginia Tech (now Cornell).…
Following the Deepwater Horizon oil spill in 2010, scientists at the University of Cambridge have been studying underwater plumes to try to understand how the Earth’s rotation affects the spread of oil.…
Pollen is the main source of protein in a honey bees diet and so it’s essential that they are able to carry enough of it safely back to the hive.…
The air density on Mars is 1/100th of that on Earth which means that current airborne vehicles cannot be used to explore the planet.…
How are dandelion seeds able to travel distances of over 150km across oceans, with only small feathery bristles and the power of the wind?…
Citrus fruits contain small pockets of liquid which burst upon contact releasing a jet of strong smelling oil into the air.…
Beyond its theoretical contribution, this work also has signicant practical impact. It provides new and important insight into how to adapt and optimize the performance of compressed sensing in practical applications. It introduces a new generation of sampling strategies based on multilevel random sampling which are both theoretically optimal and outperform previous state-of-the-art approaches in practice. It has led to new approaches in MRI, NMR, uorescence microscopy and helium atom scattering which offer signicant performance gains.
In the year 1781 the problem of optimal transport was first formally discussed by the French mathematician Gaspard Monge. The major point in this field is the task of transforming a probability measure into another one in the way that consumes least energy.…
Air-tables create a thin film of air capable of supporting objects and causing them to levitate. By adding grooves to the table or the object, Professor John Hinch at the University of Cambridge was able to control the objects motion and describe the resultant acceleration in terms of a simple scaling relationship involving gravity and the aspect ratio.…
Listen to @BBCRadio4's Start the Week, featuring @NineDotsPrize winner @jkkusiak, talking about her book, 'Radically Legal'. Learn how a group of ordinary people inspired the book when they reclaimed over 240,000 apartments back from corporate landlords 🔗
Start the Week - ‘Left behind’, but not forgotten - BBC Sounds
Tom Sutcliffe with Paul Collier, Joanna Kusiak and Matthew Xia.
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