Influential themed journal issues across the physical mathematical and engineering sciences.
Category: engineering
Fluid simulation at unprecedented scale provides toolkit for fundamental physics and applied fluid engineering
What governs the speed at which raindrops fall, sediment settles in river estuaries, and matter is ejected during a supernova? These questions circle around one, deceitfully simple factor: the rate at which a fluid filled with particles mixes with a particle-free one. Raindrops travel from one layer of air to another; sediment falls from river to seawater, and ejecta travels from the exploding star through the surrounding dust cloud. The same principle dictates sediment mixing in rising smoke, dust storms, nuclear explosions, hydrocarbon refining, metal smelting, wastewater treatment, and more.
New simulations have now provided researchers and engineers with unprecedented access to these fundamental fluid mechanics. While plainly visible in everyday life, the phenomenon has eluded scientific scrutiny due to their complexity. For the first time, researchers have derived a general formulation of how layers of heavy particles mix and described the common characteristics of the phenomena.
Simone Tandurella, study first author and Ph.D. student in the Complex Fluids and Flows Unit at OIST, explains, “Both the simulations and the model we obtain enable exciting research into a wide range of fundamental physics phenomena, as well as applied research in fluid engineering. They provide the basic puzzle pieces that can help us understand fluid-particle instabilities at large scales.”
Low-cost, high-performance plastic heat exchanger rivals traditional metal systems
A recent study in Advanced Science reports an innovative, low-cost polymer heat exchanger that could transform how industries manage heat. The device was developed by a Rice University research team led by Daniel J. Preston, assistant professor of mechanical engineering.
Heat exchangers are essential to modern technology. They improve and reduce waste by transferring heat between fluids, enabling safe and effective operation of everyday appliances like computers, cars and refrigerators as well as large-scale systems such as industrial plants and rockets.
Made of metal, current heat exchangers are heavy and bulky, prone to rusting and clogging and costly to buy and maintain. As heat-generating infrastructure grows—from data centers and desalination plants to compact electronics and space technologies—engineers are seeking lighter, more compact and affordable alternatives.
Flash heating upcycles waste glass into SiC nanowires in seconds
Engineering silicon carbide (SiC) with tailored morphologies for electronics and structural reinforcement materials has always been a costly and time-consuming affair, but scientists can now do it in a flash. A new study shows how discarded glass and silicon-rich coal waste can be turned into valuable SiC nanowires in seconds using a process known as Fluorine-Assisted Flash (FAF) Joule heating, where a quick pulse of electricity instantly heats up the reaction mixture to extremely high temperatures.
In FAF, the fluorine additives trigger the catalytic materials, such as the iron oxides found naturally in waste glass, to act as seeds that drive selective growth of one-dimensional nanowires in under a minute and with an impressive yield of 96%. When used as a reinforcement material in composites, SiC nanowires emerged as clear winners over SiC powders in providing hardness and wear resistance. The findings are published in Matter.
Acoustic driving enables controlled condensation of light and matter on chip
An international research team led by Alexander Kuznetsov at the Paul Drude Institute for Solid State Electronics (PDI) in Berlin has demonstrated a fundamentally new way to control the condensation of hybrid light-matter particles. Using coherent acoustic driving to dynamically reshape the energy landscape of a semiconductor microcavity, the researchers achieved deterministic steering of a macroscopic quantum state into its lowest energy configuration.
The results, published in Nature Photonics, establish a strategy for engineering nonequilibrium quantum states and open prospects for ultrafast, tunable photonic technologies.
In collaboration with long-term partners from the National Scientific and Technical Research Council CONICET and the Bariloche Atomic Center and Balseiro Institute in Argentina, the team experimentally realized a universal scheme for selectively transferring populations within a multilevel quantum system using strong time periodic modulation.
Simulations suggest a breakthrough in understanding how turbulence develops
A new study revisits a century-old question about how turbulence starts. The findings could potentially influence not only aircraft engineering but even the design of mechanical heart valves, and treatment of heart disease. The study is published in Scientific Reports.
Computer simulations at Stockholm’s KTH Royal Institute of Technology indicate that very small vortices may create increasingly larger swirls of flow—the opposite of the traditional view of how energy is transferred in turbulence.
Often seen in nature, from whirlpools to the shape of galaxies, vortices are one of the main flow structures that drive turbulence. The dominant idea over the last 100 years is that large swirling motions in a fluid break apart into smaller and smaller swirls, passing energy down the chain until it finally disappears—a process known as the forward cascade.
Dutch govt warns of Signal, WhatsApp account hijacking attacks
Russian state-sponsored hackers have been linked to an ongoing Signal and WhatsApp phishing campaign targeting government officials, military personnel, and journalists to gain access to sensitive messages.
This report comes from the Netherlands Defence Intelligence and Security Service (MIVD) and the Netherlands General Intelligence and Security Service (AIVD), who confirmed that Dutch government employees have been targeted in the attacks.
The Dutch intelligence agencies say the operation relies on phishing and social-engineering techniques that abuse legitimate authentication features to take over accounts and covertly monitor new messages.
The 15 Most Powerful Space Gods in Fiction
In the vast scale of the cosmos, the word “God” takes on a terrifying new meaning. Today, our channel performs a deep dive into the 15 most powerful space gods in fiction, ranking them not just by their size, but by their ability to rewrite the source code of reality itself. From the machine “janitors” of Mass Effect to the narrative-bending power of The One Above All, we break down six tiers of cosmic authority. We explore the “Neural Physics” of the Precursors, the entropic hunger of Unicron, and the conceptual nightmare of the Chaos Gods. In this video, we cover:
Tier 1: The Material Masters (Reapers, C’tan, Precursors)
Tier 2: The Chaos Agents (The Outsider, Bill Cipher)
Tier 3: The Entropic Consumers (Unicron, The Witness)
Tier 4: The Multiversal Shapers (The Q, Zeno, Anti-Spiral)
Tier 5: The Conceptual Deities (Arceus, Chaos Gods, Azathoth)
Tier 6: The Ultimate Sources (The Presence, The One Above All)
Which of these cosmic entities has the best design? Let us know in the comments! Watch Next: [Link] Star Destroyer vs. Mass Effect Reaper: Technical Breakdown Subscribe to Our Channel for more engineering and lore comparisons!