Happy Birthday, Wilhelm Röntgen

Bridget Cunningham March 27, 2017

Wilhelm Röntgen was a German physicist who is best known for his discovery of X-rays — a finding that earned him the first Nobel Prize in Physics. Recognized as the father of diagnostic radiology, Röntgen’s contributions marked a revolutionary breakthrough within the medical community. On this day, the anniversary of his birthday, we celebrate the life and legacy of this influential figure.

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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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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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Bridget Cunningham March 1, 2017

To provide sufficient support for a rotating shaft or journal, it is important to choose a hydrodynamic bearing design with the right load capacity. If the applied loads are greater than a bearing design can handle, it can cause excessive wear and instability. With the Rotordynamics Module, an add-on product to the COMSOL Multiphysics® software, you can compare the load capacities for different types of hydrodynamic bearings and determine which one is best suited for your particular application.

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Bridget Cunningham February 8, 2017

Electrical installations must often adhere to requirements for the maximum electric field levels in their surrounding area. Electric fields that are too high can be harmful to both operators and the general public. Simulation is typically used to verify that these levels meet the requirements, otherwise significant redesigns may be needed much later on. The Application Builder enables design engineers to perform verification studies earlier in the process.

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Bridget Cunningham January 13, 2017

For automotive designers, developing effective evaporative emission control systems in vehicles is an important task. Without these systems, volatile hydrocarbons can escape from a vehicle’s fuel tank, producing air pollution and smog. The COMSOL Multiphysics® software provides the features and functionality needed to model these systems in order to understand their operations and improve their performance. Here’s a look at one research team’s analysis of an evaporative emission control system for bioethanol-blend fuels.

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Bridget Cunningham January 2, 2017

When a reciprocating engine’s crankshaft is under rotation, self-excited vibrations occur. These vibrations result from the eccentricity of the crank pin and balance masses on the mechanical part. Here, we’ll accurately study the response of the rotors and the orbits of the mass balances on the shaft with the Rotordynamics Module, a new add-on product to the COMSOL Multiphysics® software and Structural Mechanics Module. From these results, you can improve a crankshaft’s design to reduce vibrations, while optimizing engine performance.

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Bridget Cunningham December 26, 2016

Designing MEMS devices, such as piezoresistive pressure sensors, comes with challenges. For instance, accurately describing the operation of these devices requires the integration of various physics. With the COMSOL Multiphysics® software, you can easily couple multiphysics simulations in order to test a device’s performance and generate reliable results. Today, we’ll look at one example that showcases such capabilities.

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