Performing a Multiphysics Analysis of a Thermal Microactuator

Bridget Paulus March 8, 2019

Small, powerful, and efficient, thermal actuators are a good choice for devices such as thermostats and MEMS. This type of actuator heats up via an applied voltage and deforms in such a way that it “actuates” another component. Thermal actuators involve tightly coupled electrical, thermal, and structural phenomena that affect device performance and must be accounted for. Using the COMSOL® software, you can gain insight into these multiphysics interactions and optimize thermal actuator designs.

Read More

Lipeng Liu March 7, 2019

Ships and submarines can be detected by enemy defense systems due to their magnetic signatures. Therefore, numerical analysis of the magnetic signature is of great importance in the design and operation of such vessels. However, the sheet metal used for construction is thin compared to the dimensions of the vessel, which makes the standard finite element approach with volume meshing inefficient. This blog post discusses a way to speed up the computation using a simple submarine example.

Read More

Thomas Forrister March 6, 2019

Nowadays, the need for travel is growing — and with it, transportation alternatives that are greener; less noisy; and, of course, faster. But what moves must eventually stop, and while most planes, trains, and automobiles use mechanical braking, this type of braking can cause damage and become unsafe at high speeds. Not so with eddy current braking. Here, we investigate the potential for this type of frictionless braking and the phenomenon behind this effect.

Read More

Bridget Paulus March 5, 2019

Charge exchange cells can alter the charge of an ion beam, making them useful in fusion reactors, particle accelerators, and semiconductor fabrication equipment. Improving the design of these devices, though, can be time consuming, as many factors (like the input beam’s energy, cell geometry, and neutral number density) affect their performance and must be tested. While these analyses are typically done by simulation experts, they can make the design of such devices accessible to others by building a simulation application…

Read More

Guest F. Xavier Alvarez February 28, 2019

Today, we invite guest blogger F. Xavier Alvarez of Universitat Autònoma de Barcelona (UAB) to discuss modeling heat transfer at the nanoscale using a novel theoretical framework and the COMSOL Multiphysics® software.

Read More

Christopher Boucher February 27, 2019

When analyzing optical designs, it is essential to consider not only light intensity but also polarization. Careful manipulation of light polarization can greatly improve image quality by filtering out light from unwanted sources — for example, to minimize glare. A useful way to learn about light polarization, and how to manipulate it, is through a Fresnel rhomb. With the COMSOL Multiphysics® software, engineers can model the effect of a Fresnel rhomb and similar elements on light polarization in optical systems.

Read More

Categories

Bridget Paulus February 12, 2019

Heating circuits can be found in airplanes, electronic message boards, medical storage devices, and much more. Like many other heating elements, these circuits work through resistive heating, a multiphysics process involving electric currents, heat transfer, and structural deformation. To account for these phenomena and other key design factors, engineers can create virtual prototypes of heating circuits using the COMSOL Multiphysics® software.

Read More

Bridget Paulus January 28, 2019

Cables provide power to sky-high airplanes, underground mines, and offshore wind farms. Depending on the use case, cables can have vastly different shapes, sizes, and environments — all of which affect their performance. In his keynote talk at the COMSOL Conference 2018 Lausanne, Adrien Charmetant of Nexans explained how multiphysics modeling is used to optimize cable designs. Below, you can find a summary and video of his presentation.

Read More

Bridget Paulus January 11, 2019

From blood pressure sensors to electronic money cards, planar coils are widely used. Found on circuit boards, these coils are a good choice for inductive coupling, especially when space is limited. When designing these coils, it’s important to calculate both their inductance and resistance, as these factors play a key role in the device’s performance. To do just that, engineers can use layered shell functionality in the COMSOL® software, which enables them to model all coils on one plane.

Read More

Chien Liu December 27, 2018

Carrier dynamics plays an important role in the transient behavior and frequency response of semiconductor devices. Here, we use two tutorial models of PIN rectifiers in the Semiconductor Module, an add-on to the COMSOL Multiphysics® software, to demonstrate the simulation of dynamical effects.

Read More

Emily Ediger December 25, 2018

Optimizing the food dehydration process can be tricky, but it is helpful and necessary for areas with food shortages. In his keynote presentation at the COMSOL Conference 2018 Lausanne, Thijs Defraeye of Empa discussed how his team uses multiscale modeling to understand the drying process for soft cellular foods. If you missed his talk, you can watch a video recording of the presentation and read a summary below.

Read More


Categories


Tags

1 2 3 34