Fanny Littmarck | February 15, 2013

If you’re in the business of designing transducers, resonators, actuators, or sensors, odds are you deal with piezoelectric materials — a key component in these devices. As we’ve said before, multiphysics simulation should play a central role in the product design-stages to ensure top quality without wasting time or money. For those of you who design piezoelectric devices, we have an upcoming piezoelectric simulations webinar on February 28th.

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David Kan | February 14, 2013

In a popular post from last year, I discussed accessing and manipulating the underlying equations in COMSOL. This blog post instigated reader comments, and most of the respondents appreciated, or even required, the ability to look at the mathematical model (i.e., equations) behind the physics. While considering this, I realized that there is more to the story, and with a little perspective, the community could benefit from further discussion.

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Valerio Marra | February 13, 2013

As discussed in On Solvers: Multigrid Methods (referred to as “Part 1″), iterative methods eliminate oscillatory error components efficiently while leaving the smooth ones almost untouched (smoothing property). The main idea behind multigrid methods is to use the smoothing property, spatial aliasing, and the residual correction to the advantage of convergence. Before putting all the pieces of this proverbial puzzle together, we need to introduce residual correction and, even though we talked about it in the previous blog post, dig […]

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Lauren Sansone | February 12, 2013

Decisions have been made, locations have been selected, and the dates have been confirmed. The COMSOL Conference 2013 has been finalized and you are all invited! While October may seem a ways off for many of you, I know there must be some “planners” out there, like me. If you too like marking your calendar, here are this year’s conference dates: Boston, MA: October 9-11 Bangalore, India: October 17-18 Rotterdam, Netherlands: October 23-25 Singapore, Singapore: October 24-25 Taipei, Taiwan: October […]

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Andrew Griesmer | February 11, 2013

Ultra-precise optical components require blemish-free surfaces that often cannot be achieved by the machining processes that grind these components. Fluid jet polishing (FJP) is a new technology being developed by Zeeko Ltd to replace the hand polishing that was often required. With the help of COMSOL, Zeeko was able to create a product that polishes the optical components in only ten minutes instead of an entire day, and without waveforms.

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Valerio Marra | February 8, 2013

The differential equations that describe a real application admit an analytical solution only when several simplifying assumptions are made. The insights we gain from this approach are still valuable, but are not enough to confirm that our design is efficient or reduce the number of prototypes needed to reach a complete understanding of our application. This is why numerical solution methods are so important to us. They have been developed to overcome such limitations and allow us to represent our […]

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Fanny Littmarck | February 7, 2013

If you’ve studied structural mechanics you’re probably familiar with stories of planes falling out of the sky due to fatigue (no one wants to be the engineer who designed an airplane that crashed…). Jimmy Stewart made a famous movie about that, but different from the usual horror stories of fatigue is the accident in 1919 of a storage tank that burst in Boston, spilling molasses onto the streets at 35 mph (56 km/h). The Boston Molasses Disaster, as it’s referred […]

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Phil Kinnane | February 6, 2013

In its natural state, air is a good insulator. However, if it’s adequately ionized, it can ultimately lead to “corona discharge”. What does that mean and why is it important? Let’s find out.

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Fanny Littmarck | February 4, 2013

Electrodeposition is the process of making a substance adhere to an object through electrochemical reactions. Sometimes the substance is available in the solution form and other times it is a solid object too, and needs to undergo electrochemical reactions in order to dissolve into solution; often as part of the electrodeposition process. Electrodeposition can be an important part of the refining process of certain metals, such as copper, silver, and gold and is often referred to as electrorefining or electrowinning. […]

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Fanny Littmarck | February 1, 2013

Microbubbles filled with oxygen can be injected into contaminated lakes to restore the water quality. Typically, water is purified via water-treatment plants, but this microbubble technique is both inexpensive and more environmentally-friendly in comparison. As seen in a COMSOL News 2011 article, oxygen microbubbles are a researcher’s way of copying nature’s own self-restoration mechanism for cleaning contaminated lakes.

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Fanny Littmarck | January 31, 2013

Transformers are used to increase the voltage of an alternating current (AC) before moving it along the power grid via power lines. Since power lines lose energy through heating cased by electric currents, you can achieve more economical power transmission by transforming to a high voltage and low current. As a matter of fact, high voltage (HV) power transmission lines transmit portions of its power in the air surrounding it. Furthermore, as the current travels long distances through many transformer […]

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