How to Implement a Delay in Your Thermostat Simulation

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.

Read More

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.

Read More

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.

Read More

Abbie Weingaertner | June 9, 2016

Ever been in a tall building on a windy day or had an aircraft pass over your house? Along with the noise that you hear, which can be disruptive and unpleasant in its own right, you’ll also notice some low-frequency vibrations that can ultimately affect the structure’s stability. One solution to this problem is to incorporate dampers, particularly viscoelastic structural dampers, into the structure’s design. With simulation apps, the path to optimizing these devices is more efficient than ever before.

Read More

Caty Fairclough | June 2, 2016

When designing motorcycles, noise reduction is a primary area of concern. Loud, poorly designed motorcycles may not meet noise regulations or satisfy customers. As such, there is a need to reduce motorcycle noise by identifying and eliminating its sources. To do so, researchers at Mahindra Two Wheelers, Ltd. turned to acoustics simulation.

Read More

Categories

Caty Fairclough | May 24, 2016

The magnetostrictive effect causes magnetic materials to change their shape when a magnetic field is applied. Materials that exhibit such behavior are used in a range of devices, from loudspeakers to actuators. In order to analyze one type of device, a magnetostrictive transducer, researchers from ETREMA Products, Inc. performed single-physics and multiphysics simulation studies in COMSOL Multiphysics. See how the flexible nature of the software enabled the team to study various aspects of the device and optimize its overall design.

Read More

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.

Read More

Caty Fairclough | June 15, 2016

Bolometers have the ability to detect and measure the power of incident electromagnetic radiation. This allows them to be used in a range of technologies, from night vision cameras to far-reaching astronomy projects. Designing bolometers often requires devoting a lot of time and energy to the development phase, as these devices must be optimized for sensitivity and customized for their specific applications. To efficiently design bolometers with increased sensitivity, AltaSim Technologies utilized the simulation capabilities of COMSOL Multiphysics.

Read More

Bridget Cunningham | June 6, 2016

When designing a device or process, it is important to not only study the system itself, but to also account for the effects of the environment around it. Historical weather data can help to address such effects by offering deeper insight into the weather patterns across different locations and time frames. Take a closer look at how such data can foster better design decisions, with a particular emphasis on its benefits within heat transfer modeling.

Read More

Brianne Costa | May 31, 2016

Reservoirs, dams, and other outdoor structures need to be strong, reliable, and sound. The porous materials found within these structures can be easily damaged by pressure changes that cause fluid flow and gradual caving and sinking. Using the multiphysics simulation capabilities of COMSOL Multiphysics and the Poroelasticity interface, we can accurately analyze porous materials to evaluate and avoid deformation in such structures.

Read More

Bridget Cunningham | May 23, 2016

In various engineering fields, studying acoustic reflection and absorption is an important point of consideration. Simulation is a valuable tool for performing such analyses, helping to better explain how sound waves interact with their surrounding surfaces. Today, we’ll look at how the Application Builder is extending the reach of such simulation capabilities by using the example of acoustic reflections off a water-sediment interface.

Read More

1 2 3 25