Analyzing Electrical and Thermal Conductance in a Contact Switch

Alexandra Foley | July 29, 2013

A contact switch is used to regulate whether or not an electrical current is passing from a power source and into an electrical device. These switches are found in many types of equipment and they are used to control, for example, the power output from a wall socket into a device when it is plugged in; the currents passing across the circuit board of a computer; or the electricity powering a light bulb when the switch is flipped on. Because of their […]

Bernt Nilsson | July 26, 2013

Julie Slaughter and her team at ETREMA Products are in the enviable position as the sole U.S. provider of the smart material Terfenol-D, and developer of products based on this material. Terfenol-D is said to produce giant magnetostriction that boasts strains 100 times higher than traditional magnetostrictive materials, such as iron. Just imagine the possibilities of applications harnessing this amazing material property. If you’re attending the COMSOL Conference in Boston this October, you will hear ETREMA talk about transducer design […]


Kristen O'Connor | July 24, 2013

The COMSOL Conference makes three major stops across the globe annually in the United States, Europe, and India. The exact locations within these geographical areas are not chosen at random; they are top-traveled cities with lots to see and do while you’re there. While the main focus of the event is (of course) to bring together multiphysics enthusiasts, we want to help make the most out of your visit as a whole. Here is your guide to the three major […]


Mateusz Stec | July 22, 2013

Research on fatigue started in the 19th century, initiated following failing railroad axles that caused train accidents. In a rotating axle, stress varies from tension to compression and back to tension in one revolution. The load history is simple because it is uniaxial and proportional. Fatigue can then be evaluated with the S-N curve, also known as the Wöhler curve, which relates stress amplitude to a component’s life. In many applications we deal with multiaxiality and non-proportional loading. In this […]

Alexandra Foley | July 18, 2013

Underground medium voltage cables are often used to deliver electrical power from a transmission system and into the home of consumers. In the United Kingdom, these cables carry hundreds of amps at voltages between 11 and 33 kV, a typical voltage of electrical transmission cables around the world. Analyzing the stresses that these cables are exposed to over their lifetime is important for ensuring both consumer safety and energy efficiency. Researchers from the Glasgow Caledonian University in Scotland used COMSOL […]


Fanny Littmarck | July 16, 2013

Our day-to-day lives are dependent on the safety of technical systems and processes. We blindly trust that reactor vessels withstand the test of time, that the train or ship we’re on does not break down. These metal structures, in turn, rely on accurate welding processes. Here’s where BAM Federal Institute for Materials Research and Testing comes into the picture. BAM researchers have been working on improving upon the high-power laser beam welding process in order to promote safer and more […]

Fanny Littmarck | July 25, 2013

From supporting research to creating custom prosthesis, what doesn’t 3D printing seem to promise these days? We all know 3D printing has arrived, and the technology is already being put into practice by companies and tech-savvy consumers everywhere. It seems there’s a new 3D printing success story published every day, and no matter how fascinating, it makes you wonder about the wider repercussions and limitations of 3D printing.


Alexandra Foley | July 23, 2013

There are many different forces that can induce flow in fluids, such as kinetic energy, pressure gradients, concentration gradients, and many more. In natural systems, one effect that can initiate fluid flow in a still fluid is a change in density. This density change will result in a change in the fluid’s buoyancy, thus inciting flow as the denser fluid sinks and the less dense, buoyant, fluid rises. You’re probably most familiar with these changes in density occurring due to […]


Laura Bowen | July 19, 2013

The way the sound is shaped as it passes through the pipe of an organ is the result of a carefully calculated and intricate pipe design. Browsing through the Model Gallery, I came across a model of an organ pipe, and it happens to be a great acoustics tutorial for using the Pipe Acoustics, Frequency Domain interface in COMSOL Multiphysics. Let’s talk organ pipe design, and walk through how we can model it with multiphysics software.


Lauren Sansone | July 17, 2013

If you want to get a sense of what the COMSOL Conference is all about before the event takes place this year, you can. We’ve gathered highlights from the COMSOL Conference 2012 so you can hear what last year’s attendees said about the event, what the keynote speakers talked about, who won Best Paper and Best Poster, and more.


Alexandra Foley | July 15, 2013

The Doppler effect, or Doppler shift, is the change in wavelength and frequency caused by the movement of an observer relative to the source. One of the most common ways we can experience the Doppler effect in action is in the change of pitch that occurs due to a moving sound source. You’ve probably experienced the Doppler effect when a fire truck or ambulance passes by with its sirens blaring. As the siren passes, the pitch suddenly drops as the […]


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