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Magnets Improve Quality of High-Power Laser Beam Welding

M. Bachmann, V. Avilov, A. Gumenyuk, and M. Rethmeier
BAM Federal Institute For Materials Research and Testing
Germany

High-power laser beam welding uses a localized heat source to achieve narrow deep welds and high welding rates. Engineers run into some difficulties because the use of a localized heat source often results in the distortion of metal components; spattering and the ejection of droplets from the weld pool results in underfills, undercuts, craters, blowholes, or blowouts. A stationary magnetic field ...

Optimized Induction Heating Techniques Improve Manufacturing Processes

I. Jain,
Tata Steel, India

Induction heating has become a valuable tool used by the steel industry for manufacturing various metal products. The process provides more precise heating control, uses less energy, and offers better quality assurance and reliability than traditional production processes. Tata Steel, one of the top ten steel companies worldwide, is using multiphysics simulation to analyze the electromagnetic, ...

Developing a New Microreactor for Organic Synthesis Using Microwave Heating

W. Lee, K. Jensen
MIT, MA, USA

The chemical reactions used to generate solvents and certain pharmaceuticals rely on organic synthesis, a process of combining individual chemicals that can be accelerated through microwave heating. A microreactor system facilitates the direct, localized, and efficient temperature change necessary for successful synthesis. However, a uniform temperature distribution is crucial to the chemical ...

Gaining Insight into Piezoelectric Materials for Acoustic Streaming

G. Potter
SUNY Albany, NY, USA

Many sensors, such as flow sensors and those used in medical diagnostics, rely on microfluidic devices. However, mixing and pumping fluids becomes challenging because of the small size of these devices. As an alternative to traditional actuation methods, surface acoustic waves (SAWs) can be used to create fluid streaming. Through a collaboration between SUNY Albany and SEMATECH, researchers have ...

Nanoresonators Get New Tools for Their Characterization

J. Yang, M. Perrin, P. Lalanne
CNRS, France

Nanoresonators, or optical nanoantennas, manage the concentration, radiation, and absorption of light at the nanometer scale and show stunning promise for future improvements to technology, such as sensors, computers, and other electronics. However, the ways that these devices scatter light and interact with their surrounding environment are not well understood, nor are the electromagnetic ...

Battling Corrosion in Nuclear Waste Storage Facilities

G. Barbella, P. Geraldini
Sogin, Italy

Nuclear sites in Italy are being decommissioned, leaving questions about how to safely manage and store radioactive waste. Nuclear waste can be stored temporarily in steel drums encased in concrete, but environmental factors must be carefully controlled to prevent corrosion of the steel. It is difficult to constantly monitor the corrosion process, and the relative humidity in the storage area ...

Keeping Cool: SRON Develops Thermal Calibration System for Deep-Space Telescope

C. de Jonge
SRON, Netherlands

Deep-space telescopes require ultrasensitive detectors and calibration to pick up weak far-infrared signals. The SpicA Far-InfraRed Instrument (SAFARI), an infrared camera that will fly aboard the Space Infrared Telescope for Cosmology and Astrophysics (SPICA), has sensors that measure the far-infrared spectrum. The SAFARI system includes a radiation source, needed for calibration, that is so ...

Using Multiphysics Simulation to Prevent Building Damage

P. Sekki
Vahanen Group, Finland

In addition to surviving normal winters, a strong building must be able to survive the worst winters expected in a 50-year period. When moisture and contaminants enter concrete foundations, they create the risk of cracking or other structural damage once the soil or foundation freezes. Vahanen Group specializes in building services and performs quality and risk assessments to make sure that ...

Simulation Enables the Next Generation of Power Transformers and Shunt Reactors

L. Jovelli
Siemens, Brazil

From power generation to its distribution to end users, power transformers and shunt reactors are used throughout the electrical grid for voltage conversion and to absorb reactive power. At Siemens Brazil in Jundiai, São Paulo, designers are using multiphysics simulation to verify that grid-integrated transformers and shunt reactors can handle increasing power demands without overheating in ...

Actuation Technique for Miniature Robots Developed using Multiphysics Simulation

P. Lazarou, C. Rotinat
CEA LIST, France

Robotic devices for minimally invasive surgery procedures require flexible tools and careful actuation. But most robotic surgery devices are bulky, expensive, and physically draining for surgeons to operate for long periods of time. At the French Atomic and Alternative Energies Commission (CEA LIST), researchers are investigating miniature phase-change actuators that will reduce the strain placed ...

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