An Introduction to Gear Modeling in COMSOL Multiphysics

Pawan Soami | July 7, 2016

Gears are devices that are widely used for the transmission of rotary motion from one shaft to another. Automobiles, electric motors, wind turbines, and other machines all require a gearbox in order to change their speed or torque. With the latest version of COMSOL Multiphysics® — version 5.2a — we bring you new gear modeling features and functionality, from components in the Parts Library to an array of tutorial models that illustrate potential applications.

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Abbie Weingaertner | July 6, 2016

Consider a class of civil engineering structures like the Pratt truss bridge. While the concept behind each design is similar, the actual configuration of the bridge and the loads that are applied to it varies by each case. With the Application Builder, you can design a simulation tool that enables users to easily modify parameters to account for these differences in geometry and loads. Learn more with our Truss Bridge Designer computational app.

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Jessica Roy Mitchell | July 5, 2016

Requests from users like you fueled many of the available upgrades in the COMSOL Multiphysics® software and the COMSOL Server™ product version 5.2a. The ability to customize the appearance of the COMSOL Server web interface was just one of these requests. See how your feedback prompted the development of tools that allow you to easily change the look and feel of the interface to fit your organization’s branding.

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Jiyoun Munn | July 4, 2016

When designing bandpass-filter type high-Q devices with the finite element method in the frequency domain, you will likely come across a situation where you need to apply many frequency samples to more accurately describe the passband. Simulation time is directly proportional to the number of frequencies included in the simulation of a microwave device, with the time increasing as the frequency resolution used becomes finer. Two powerful simulation methods in the RF Module help accelerate the modeling of such devices.

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Walter Frei | June 30, 2016

Thermostats are used in most homes for controlling furnaces and air conditioners to maintain a comfortable interior temperature. A simple thermostat controlling a heater will have on and off setpoints. Such a control scheme is easy to implement within COMSOL Multiphysics using the Events interface, as presented in a previous blog post. Today, we will expand this technique to include a delay, a time lag between turning the heater on or off, in a thermostat simulation.

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Amlan Barua | June 29, 2016

Simulation apps, as we’ve highlighted on the blog, are a powerful tool for hiding complex physics behind an easy-to-use, intuitive interface. While the app can be used by those with little simulation expertise, understanding the layers beneath its interface — the embedded model and underlying theory — does require a good understanding of COMSOL Multiphysics and the physics at hand. Let’s explore the connection between theory, model, and app using the example of analyzing buckling in a truss tower design.

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Amelia Halliday | June 28, 2016

Simulation is a powerful tool that enables you to obtain a holistic view of your design’s performance. While the physics you are studying may be complex, the environment in which you run such studies doesn’t have to be. This rationale has served as the logic behind continuously optimizing the user interface (UI) in the COMSOL Multiphysics® software for ease-of-use. Several tutorial videos, three of which are highlighted here, guide you on how to navigate the environment and utilize its tools.

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Henrik Sönnerlind | June 27, 2016

Say you are working on a modeling case where loads are moving in such a way that they cross over different mesh elements and boundaries during the simulation. In these cases, among other instances, you may want to apply a boundary condition to only part of the geometrical boundary or only under certain conditions. In this blog post, we’ll discuss how you can utilize the flexibility of COMSOL Multiphysics to handle such situations.

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Christopher Boucher | June 23, 2016

A paraboloidal solar dish can focus solar radiation onto a small target or cavity receiver. Because solar energy is collected over a large area, the incident heat flux at the receiver is extremely high. This thermal energy can then be converted to electrical energy or used to produce a chemical energy source, such as hydrogen. Today, we discuss strategies for computing the distribution of heat flux in the focal plane of a typical solar dish concentrator/receiver system.

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Walter Frei | June 22, 2016

Have you ever wanted to quickly predict the temperature of an enclosed structure, such as your house, that is exposed to ambient environmental conditions? The temperature inside depends on the surrounding air temperature, wind speed, and solar loads, all of which have significant variability. For simplicity, we often also want to approximate the inside air as well-mixed. Today, we will discuss the tools in COMSOL Multiphysics that help you quickly build such thermal models.

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Caty Fairclough | June 21, 2016

Manned vessels traveling through space require highly efficient and reliable life support systems, such as carbon dioxide removal assemblies (CDRAs). Poorly designed systems can shorten missions and cause potential danger. Simulating CDRA systems, however, can be quite time-consuming and difficult due to their complex nature. To address such challenges, a team at NASA’s Marshall Space Flight Center developed a 1D model in the COMSOL Multiphysics® software to efficiently analyze the 4-bed molecular sieve (4BMS) of a CDRA system.

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