Electrical

Fanny Littmarck | November 6, 2012

Permanent magnet generators, or PM generators as they are also called, generate power without batteries. PM generators consist of a magnetic stator coiled with wire and a wheel with permanent magnets rotating inside the stator. From motorcycles to wind farms, PM generators can be used in many electrical machinery applications. Let’s take a look at how these types of generators work and how they can be simulated.

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Fanny Littmarck | October 31, 2012

When you need to mix something at a very small scale you don’t reach for a teeny-tiny whisk. If you’re working with microscale biochemical applications you’d be more likely to rely on diffusion to mix fluids. With highly ordered laminar flow there is no turbulence involved, thus making diffusion a prime candidate for “getting the job done”. But what if you need to mix larger molecules? Larger molecules mean higher molecular weight, which in turn leads to very long equilibration […]

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Fanny Littmarck | October 30, 2012

What if this Halloween you could take your costume to the next level and turn yourself invisible? There are bounds of references to invisibility throughout fairy tales, folk lore, and pop culture. From capes and hats to cloaking devices, many fictional characters have been provided with a means for rendering themselves invisible. In the spirit of Halloween, let’s have a closer look at cloaking from a fictional and scientific stand-point.

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Fanny Littmarck | October 24, 2012

It’s no secret that there’s a lot of guesswork involved in oil production. Oil companies make “Big Money” decisions based on estimates – estimates with huge margins of error. What’s more, there is an incredible amount of risk involved, but with the potential for a large pay-off if all goes according to plan. The plan is based on “best guesses” and less than perfect data. Still, there are many big players in the oil industry that are doing very well […]

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Phil Kinnane | October 18, 2012

As much as we would like to think that finite element analysis (FEA) is the be-all and end-all of simulations, it’s not true. There is also a camp of engineers out there that model integrated circuits and similar systems. These are based on different physics and equations than what FEA typically solves for. Yet, as is happening more and more in the world of virtual prototyping, the two types of simulations are converging. Now they need to integrate with each […]

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Fanny Littmarck | October 16, 2012

These days, RFID tags are used in many applications. Ranging from packing slips to ID badges, RFID tags are embedded into many different objects by businesses everywhere. Once tagged, these can be tracked to improve functions such as inventory management, security, manufacturing processes, and more. You can also implant an RFID tag into animals, such as cattle or pets, so that they can be found in case of theft or loss, for instance. Wild animals that are found far from […]

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Phil Kinnane | October 15, 2012

The “Gonzaga Room” at the COMSOL Conference in Milan was a pleasant setting for an interesting presentation. There, I saw Dejan Grabovickic present his paper titled: “Analysis of Super Imaging Properties of Spherical Geodesic Waveguide Using COMSOL Multiphysics”. His waveguide consisted of two copper spheres about the size of a soccer ball, one inside the other and separated by a very thin gap. I’m happy I attended this particular presentation, as it would later receive one of the Milan Conference […]

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Phil Kinnane | September 18, 2012

In short, electronic computer-aided design (ECAD) is typically used to design and develop electronic systems. Although it’s a mere letter away from spelling out “CAD”, there’s actually more to the story than appending the word “electronic” to “CAD”. So what is ECAD and why is it used in Finite Element Analysis (FEA)?

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Valerio Marra | July 30, 2012

All this talk about piezoelectricity got me thinking about how surrounded we are by everyday items whose performances rely on this physical process. Examples include inkjet printers, speakers, electric guitars, and ultrasound imaging systems. With so many different common objects utilizing this phenomenon, it may lead you to wonder: what is piezoelectricity?

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Phil Kinnane | July 24, 2012

Looking for a tutorial on how to model a MEMS problem? We have recently added a video tutorial using the example of how to simulate a capacitive pressure sensor to our video gallery. For a brief overview of what you can model in the MEMS Module watch the trailer below, or go straight to the bottom of this post for a link to download the model files, which show how to produce this type of electromechanics model.

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David Kan | May 29, 2012

On the 17th of May, 27 engineers and scientists related to the oil and gas industry gathered in Northwest Houston to learn more about COMSOL Multiphysics applications for well logging. This area of research and development is of particular interest to the oil services companies, who make tools that help maximize the output from wells. These tools are highly advanced technological devices. They work by being inserted into a wellbore and detecting how much hydrocarbon (e.g., oil) is in the […]

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