Evaluating Microphones and Transducers with Simulation

Aditi Karandikar | August 2, 2016

Acoustic measurements aren’t always accurate due to imperfections in the measurement tools. To limit incorrect results, devices, such as microphones and vibration transducers, have standards that define their allowable margin of error. Meeting these standards is required, but good measurement tools go a step further and keep their error range consistent over time. To create quality devices, research teams at Brüel & Kjær use multiphysics simulation to model their microphone and transducer designs.

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Abbie Weingaertner | August 1, 2016

Modern food processing techniques are constantly being analyzed and improved. To evaluate the efficiency of such techniques and the equipment that they utilize, researchers and engineers can turn to simulation tools like COMSOL Multiphysics. Numerical modeling apps are helping to bring this simulation power to a wider audience, accelerating the optimization of such processes along the way. Let’s see how this applies to the analysis of induction heating for food processing.

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Caty Fairclough | July 29, 2016

Around the world, millions of people lack access to improved sources of drinking water. Pesticides, bacteria, organic matter, and other pollutants can make accessible water unsafe for human consumption. Finding a cost-effective and easy method to purify water is therefore a major global initiative. One possible solution is a nanoparticle biofoam, which may provide an efficient method for generating safe drinking water.

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Henrik Sönnerlind | July 28, 2016

In the latest version of COMSOL Multiphysics® — version 5.2a — we bring you new features designed to enhance your structural mechanics contact modeling. You can, for instance, simulate objects that stick together once they come in contact (adhesion) as well as those that pull apart (decohesion), including full cohesive-zone modeling. Learn how to address each of these scenarios using the new functionality in COMSOL Multiphysics.

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Kateryna Vyshenska | July 27, 2016

Archimedean spirals are often used in the analysis of inductor coils, spiral heat exchangers, and microfluidic devices. Today, we will demonstrate how to build an Archimedean spiral using analytic equations and their derivatives to define a set of spiral curves. Based on these curves, we will then create a 2D geometry with specific thickness, extruding it to a full 3D geometry.

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Bridget Cunningham | July 26, 2016

As technology evolves, the demand for devices with greater features and functionality emerges. Of course, this means that the designs themselves become more intricate and complex. Simulation offers an efficient route to analyzing and optimizing such devices, prompting further industrial innovation along the way. Today, we’ll take a look at how a team from University of Buffalo designed multiphysics models and simulation apps to spread modeling expertise to a broader range of industries.

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Caty Fairclough | July 25, 2016

Quadrupole mass filters, the key component of quadrupole mass spectrometers, filter ions by their charge-to-mass ratio, only allowing ions with a certain ratio to pass through the device. As such, a high transmission probability for a specific ion through the filter is desirable. However, fringe fields in the mass filter can affect this probability. By using multiphysics simulation, we can take a closer look at quadrupole mass filters and investigate the effect of fringe fields on these devices.

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Bridget Cunningham | July 21, 2016

In any form of treatment, it is always desirable to minimize the level of discomfort that the treatment process causes patients, while ensuring overall safety and effectiveness. For diabetes patients, insulin injections remain an important form of treatment, but the process itself can be painful. With the help of multiphysics simulation, a team of researchers from the University of Ontario Institute of Technology sought to develop a MEMS-based micropump that could administer insulin injections in a safe and painless way.

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Bridget Cunningham | July 20, 2016

Cryogenic techniques are used to treat a wide range of cosmetic dermatological problems as well as remove internal tumors and other damaged tissue. Shifting from the typical nitrogen-based approach, researchers at the University of Birmingham in the U.K. sought to investigate the potential of using a thermoelectric cooler, or Peltier device, to cool a cryogenic probe. Here’s a look at how COMSOL Multiphysics provided them with the tools to do so.

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Caty Fairclough | July 19, 2016

While bumblebees are not a complete mystery, we still have a lot more to learn about these helpful insects. A topic with a lot of buzz surrounding it is how they find food. Using electroreception, an ability most often found in aquatic animals, is one possibility. But how do bumblebees use electroreception? To find answers, a research team at the University of Bristol combined the power of physical experiments and simulation.

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Nirmal Paudel | July 18, 2016

In this blog post, we work through the three-phase induction motor described in Testing Electromagnetic Analysis Methods (TEAM) workshop problem 30a. We analyze the induction motor in 2D using the transient solver in the Rotating Machinery, Magnetic interface. We investigate the motor’s start-up dynamics by coupling the electromagnetic analysis with the rotor dynamics, including the inertial effects. At the end, we compare the benchmark model’s results with those from the COMSOL Multiphysics simulation.

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