Walter Frei | February 19, 2015

A thermostat is a device that senses the temperature of a system and uses this information to control the system’s heaters, or coolers, to keep the temperature close to a desired setpoint. While there are many different types of thermostats, we will focus today on one that turns a heater either on or off based upon two setpoints. This is known as an on-off or a bang-bang controller, and it can be implemented with the Events interface in COMSOL Multiphysics.

Read more ⇢
Bridget Cunningham | February 18, 2015

Space frames have been used as the foundation for the construction of many modern buildings, from the Louvre in France to Globen in Sweden. When designing space frames, we need to asses the risk of instability.

Read more ⇢

Article Categories

Walter Frei | February 16, 2015

One of the more common questions we are asked is about the modeling of periodic, or pulsed, heat loads. That is, a heat load that turns on and off repeatedly at known times. Modeling such a situation accurately and efficiently in COMSOL Multiphysics is quite easy to do with the Events interface. The techniques we will introduce are applicable to many classes of time-dependent simulations in which you have changes in loads that occur at known times.

Read more ⇢

Article Categories

Niklas Rom | February 13, 2015

Many exciting features for chemical engineering modeling were introduced in COMSOL Multiphysics version 5.0. In this blog post, I will discuss the most important updates. There are some new modeling interfaces, such as the Chemistry interface, and some that have been revamped and improved, like the Reaction Engineering interface. To begin with, I will recap the modeling interfaces for reaction engineering and mass transport.

Read more ⇢
Alexandra Foley | February 12, 2015

In the paper “Degeneracy Breaking, Modal Symmetry and MEMS Biosensors”, which was presented at the COMSOL Conference 2013 in Rotterdam, researchers experiment with using material and geometric symmetry breaking to design a MEMS biosensor.

Read more ⇢

Article Categories

Bridget Cunningham | February 11, 2015

The impact of light in various technologies has been evident in the past several years. Recognizing its significance in shaping the future, the UN General Assembly designated the year 2015 as the International Year of Light and Light-Based Technologies. We introduce you to a few interesting technologies in which light plays a crucial role.

Read more ⇢

Article Categories

Annette Meiners | February 10, 2015

Plasmas can exhibit a large variety of properties. There are plasmas with high and low ionization degrees, as well as those with high and low pressures and hot and cold temperatures. Different equations and modeling approaches are necessary for each kind of plasma. This blog post gives an overview of the different plasma types and shows when to use which of the interfaces available in the Plasma Module.

Read more ⇢

Article Categories

Chien Liu | February 9, 2015

This post continues our blog series on the weak formulation. In the previous post, we implemented and solved an exemplary weak form equation in the COMSOL Multiphysics software. The result was validated with simple physical arguments. Today, we will start to take a behind-the-scenes look at how the equations are discretized and solved numerically.

Read more ⇢

Article Categories

Bridget Cunningham | February 6, 2015

While the designs have become more elaborate, the manufacturing of stained glass windows has remained relatively the same throughout its history. We go beyond the beauty of the art form and dive into the science behind its production.

Read more ⇢

Article Categories

Ed Fontes | February 5, 2015

Starting the car on a cold winter morning can be unpleasant if you have not been proactive the night before. When you are unable to start an engine, it is often the battery’s fault. Why is a battery more sensitive than other processes in a car? The answer lies in the battery’s ability to convert chemical energy into electrical energy, with a minimum of heat generation, and the relatively small amounts of thermal energy available at low temperatures.

Read more ⇢

Article Categories

Bridget Cunningham | February 4, 2015

When undergoing testing for electromagnetic compatibility compliance, many products rely on biconical antennas. In order to help with this testing, it is important that these antennas possess broadband characteristics. We explore how simulation can help you ensure this.

Read more ⇢

Article Categories

1 3 4 5 6 7 81