Understand Phenomena in the Viscous Catenary Problem via Simulation

Bridget Cunningham March 22, 2017

The viscous catenary problem has generated a lot of theoretical and experimental interest in recent years. This is due to the industrial importance of the rich phenomena that occur within it. Using the flexibility of the COMSOL Multiphysics® software, we can gain fundamental insights into complex problems like the viscous catenary problem and determine the validity of the assumptions made in previous analyses.

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Bridget Cunningham March 21, 2017

Exposure to the environment can negatively impact an antenna’s radiation characteristics and lead to greater losses. One way to protect these devices is with radomes, which are enclosures that can shield antennas while improving their overall performance. When designing a radome, measuring its effectiveness is key, as designs without optimized configurations have less influence. With the example of a patch antenna, we discuss using simulation to gain insight into a radome’s ability to improve antenna directivity.

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Caty Fairclough March 17, 2017

When simulating hearing aids, it’s important to determine how transducers interact with the rest of the system. In some cases, these studies require fully detailed models, increasing their computational cost. One alternative is coupling a lumped parameter transducer model with a multiphysics model representing the whole system. In this blog post, we discuss the example of a Knowles ED-23146 receiver (or miniature loudspeaker) that is connected to a test setup and compare the results to measurement data.

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Kristoffer Raneflod March 15, 2017

Have you ever thought about customizing or building a model in the COMSOL Multiphysics® software that is based on data from Excel® spreadsheet software? Excel spreadsheets are used to present, collaborate, and store data within many science and engineering applications. Using Microsoft® Visual Basic® for Applications and LiveLink™ for Excel®, we can build and control model settings and parameters within the Excel® spreadsheet software. In this blog post, we illustrate this process and go over a few examples.

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Edmund Dickinson March 14, 2017

In corrosion analysis, we often want to study corroding surfaces whose electrical connectivity is not as simple as a controlled current or voltage. Instead, an electrode surface might be short circuited to another electrode through a direct connection, such as the electrical connection between a monopile and transition piece. Here, we look at how to describe these electrodes and external short circuits using the appropriate boundary conditions in the COMSOL Multiphysics® software.

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Bridget Cunningham March 13, 2017

Noncommunicable diseases place a socioeconomic strain on low- to middle-income countries. The advent of noninvasive technology offers a solution, effectively diagnosing, preventing, and treating these diseases at a lower cost. For chronic kidney disease, one type of noncommunicable disease, such advancements are important because current methods are expensive and prone to error. As simulation research shows, sensors based on complementary split ring resonators (CSRRs) provide an inexpensive way to accurately monitor chronic kidney disease.

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Bridget Cunningham March 10, 2017

While reverse electrodialysis (RED) is a promising source of renewable energy, it can be a challenging process to analyze. The performance of RED units is affected by the physical phenomena that occur when converting salinity gradient energy into electric current. To address this, one team of researchers used a novel approach to model such systems in the COMSOL Multiphysics® software. Their multiphysics model and subsequent simulation studies provide further insight into designing and optimizing RED units.

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Bridget Cunningham March 9, 2017

When a superconducting magnet suddenly transitions to a normal state — known as a quench — its coils may overheat. Quench detection and protection systems are often included in the magnets to enable safer operation. For these systems to be effective, it’s important to understand the resulting electrothermal transient phenomena that take place within the magnet. Using numerical simulation, we can develop sophisticated systems that prevent possible disruption effects.

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Nancy Bannach March 8, 2017

Thermoelectric coolers come in various types and sizes, including single-stage and multistage devices. Their application area is large, as they are used in both consumer products like cooling boxes and as temperature controllers in satellites. If you are looking to analyze the design of a thermoelectric cooler and optimize it for a specific application area, a simulation app is an efficient way to accomplish your goals. We discuss how to use the Thermoelectric Cooler demo app in this blog post.

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Caty Fairclough March 6, 2017

One way to design utility boilers with high thermal efficiency is to improve their furnaces — the most important part in their energy conversion process. Studying furnaces in utility boilers requires engineers to account for radiation, which can be difficult to solve for analytically and expensive to study experimentally. As an alternative, we can use the COMSOL Multiphysics® software to analyze radiative heat transfer in utility boiler furnaces and improve their designs.

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Walter Frei March 2, 2017

Have you ever modeled deforming objects in the COMSOL Multiphysics® software and wanted to know the distance between them? In today’s blog post, we will look at how to compute distances between objects using methods for determining the closest distance field. We’ll also find out how to use the distance field as a part of a multiphysics model.

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