Happy Birthday, Jean-Charles de Borda

Caty Fairclough May 4, 2018

Born to a family with a longstanding military lineage, it’s no surprise that Jean-Charles de Borda joined the French army and navy. He was a man of many trades and is also seen as a surveyor, mathematician, political scientist, and physicist. Due to his wide interests, Borda contributed to the advancement of fluid mechanics, geodesy, navigation, and more during his lifetime.

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Thomas Forrister May 3, 2018

Many antennas deployed in basic communications systems are linearly polarized, meaning that for the orientation of the electric field, polarization is confined to a single plane. Antennas that present the option of circular polarization give you more to work with, because the polarization of the wave varies while it propagates. Helical antennas, for instance, are able to generate circularly polarized waves in the axial operating mode. RF simulation can be used to optimize helical antenna designs.

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Thomas Forrister April 30, 2018

Known as the “father of information theory”, Claude Shannon shaped the way we think about computer operations and communications between devices as a single framework. His groundbreaking ideas about testing digital circuits, coding messages in binary, and programming artificial intelligence ushered us into the digital age. The internet was made possible by Shannon’s classical foundations in information science, and thanks to his equations, the amount of data we’re able to store and share consistently increases.

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Caty Fairclough April 27, 2018

Picture a classroom filled with students. At the front, a teacher discusses room acoustics, including the underlying theories and acoustics phenomena involved. To help students visualize these concepts, the teacher has created a simulation app. This app, which is accessible through a web browser, enables students to dynamically alter parameters and see the results, creating a vivid learning experience. At the Technical University of Munich (TUM), several such apps are already being used, providing benefits to teachers and students alike…

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Caty Fairclough April 25, 2018

The average human heart beats around 100,000 times in a single day. With each beat, the four valves within the heart open and close, transporting blood unidirectionally through its chambers. By simulating heart valves, medical researchers can study their behavior to address various cardiac health issues. As an example, a team from Veryst Engineering modeled a heart valve opening and closing with the COMSOL Multiphysics® software.

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Thomas Forrister April 24, 2018

Wastewater often contains organic and inorganic materials, which can be nonbiodegradable and even toxic. To reuse wastewater, these contaminants are removed via physical, chemical, and biological processes. Clarifiers treat wastewater by separating the particles via sedimentation, but their performance is affected by factors such as settling, turbulence, the ratio of the particles’ outer surfaces to mass, sudden direction changes in the flow, and the velocity profile. To design clarifiers for effective wastewater treatment, engineers can turn to fluid flow simulation.

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Christopher Boucher April 20, 2018

Attitude detection, the measurement of an object’s orientation and rotation in three-dimensional space, is a crucial element in aircraft and spacecraft navigation. Recently, ring laser gyroscopes and fiber ring gyroscopes have proven to be viable alternatives to traditional mechanical gyros for accurately measuring rotations. The fundamental operating principle of such devices is an optical phenomenon called the Sagnac effect. In this blog post, we’ll employ ray optics simulation to observe this effect in a basic Sagnac interferometer.

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Brianne Costa April 19, 2018

When it comes to advancements in healthcare, we have a lot to be thankful for. Because of anesthesia, patients no longer need to “bite the bullet” during surgery. Thanks to antibiotics, doctors don’t use bloodletting to cure an infection. Moving into more modern times, radio-frequency identification (RFID) systems offer a wide variety of innovative healthcare applications. However, like any new medical technology, biomedical RFID devices must be rigorously evaluated for performance and compatibility with other medical systems.

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Ravi Ranjan April 18, 2018

When working with multibody systems, you may need to model a mechanism that transfers motion from one component to another. The mechanism used to implement this behavior, known as a cam-follower mechanism, plays an important role in many applications, including internal combustion engines, printing control mechanisms, textile weaving machines, and valves. You can easily model this type of mechanism with the Cam-Follower feature in the COMSOL® software. Let’s take a look at this feature in detail.

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Walter Frei April 17, 2018

In applications such as power transfer and consumer electronics, it may be critical to model electromagnetic heating of materials that are nonlinear in temperature; that is, the material’s electrical conductivity and thermal conductivity vary with temperature. When modeling these nonlinearities, even an experienced analyst can sometimes get quite unexpected results due to the combination of the nonlinear material properties, boundary conditions, and geometry. Let’s find out why this is in terms of a very simple example.

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Caty Fairclough April 16, 2018

Ejectors have many applications, such as removing debris in outer space and providing refrigeration at your local supermarket. To improve ejectors for these and other uses, engineers aim to find optimal designs and operating conditions as well as accurately describe the flow within these devices. Simulation can help achieve these goals.

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