Bridget Cunningham | December 4, 2014
Attendees at the COMSOL Conference 2014 Boston had the opportunity to hear keynote speeches from COMSOL Multiphysics® simulation software users Oak Ridge National Laboratory and WiTricity. Both engaging and highly informative, these presentations offered an interesting mix of notable multiphysics applications.
Matt Pooley | December 3, 2014
Bright light-emitting diodes (LEDs) are revolutionizing the lighting industry and blue LEDs in particular are ushering in a new age of widespread efficient LED lighting. The importance of blue LEDs was marked by this year’s Nobel Prize in physics, which went to the inventors. But, because bright LEDs are driven by larger currents, they suffer from reduced efficiency — a phenomenon known as LED droop. Using multiphysics simulations, we can investigate and understand the mechanisms behind LED efficiency.
Lexi Carver | December 1, 2014
In the previous installment of the postprocessing series, we showcased techniques for visualizing results on cross-sectional slices. Now, we’ll discuss how contour and isosurface plots can be used to show quantities on a series of lines or surfaces. Though they’re usable in many applications (from heat transfer to acoustics), we’ll specifically look at how they can show mechanical stress in a driving pulley and sound pressure levels in a loudspeaker.
Niklas Rom | November 27, 2014
Mateusz Stec | November 25, 2014
The most frequent question we get regarding the Fatigue Module is “Which fatigue model should I use in my simulations?” There is no straight answer to this question, since fatigue is not based on an exact differential equation, but on engineering observations that lead to different physical models. The applicability of each model can depend on factors such as material and loading type. Today, I will discuss different approaches for fatigue model selection and the applicability of the different models.
Ed Fontes | November 21, 2014
The Tubular Reactor application is a tool where students can model a nonideal tubular reactor, including radial and axial variations in temperature and composition, and investigate the impact of different operating conditions. It also exemplifies how teachers can build tailored interfaces for problems that challenge the students’ imagination. The model and exercise are originally described in Scott Fogler’s book Elements of Chemical Reaction Engineering. I wish I had access to this type of tool when I was a student!
Daniel Smith | December 2, 2014
We just launched a new app for you to download from the Application Library update. This app is a dedicated tool for modeling the flow and pressure distribution inside a network of connected pipes. Engineers in semiconductor processing could use a tool like this to test a given design and ensure it will meet specification before prototyping the physical device. Here, I’ll give you some background info and walk you through how this app works.
Walter Frei | November 28, 2014
Whenever you are modeling the geometry that you will use for your COMSOL Multiphysics analysis, either with the native CAD creations tools in the COMSOL software or using another CAD system, you may end up with a geometry that has more features than you really need. Here, we will look at a set of features called Virtual Operations that will let you quickly and easily simplify any CAD data in preparation for modeling and meshing.
Christopher Boucher | November 26, 2014
With the release of COMSOL Multiphysics version 5.0, the Particle Tracing Module now includes a series of features called Accumulators, which can be used to couple the results of a particle tracing simulation to other physics interfaces. The accumulated variables may represent any physical quantity and can be defined either within domains or on boundaries, making them extremely flexible. Here, I will explain the different types of accumulators and their applications in particle tracing and ray optics models.
Andrew Griesmer | November 24, 2014
Importing meshes into COMSOL Multiphysics is often necessary when interfacing between different programs. With COMSOL Multiphysics version 5.0, these meshes can be converted into solid geometry objects for further investigation and modeling capabilities. You can also perform boolean operations on the new geometry for CFD, electromagetics, and acoustics applications.