Electrical Blog Posts
Fillet Away Your Electromagnetic Field Singularities
No matter how much you refine the mesh at that corner in your geometry, the electromagnetic field that you are computing never seems to settle on a converged value. Is this a problem? If so, what can you do about it? Read on to find out.
Modeling Beam Neutralization with a Charge Exchange Cell
Charge exchange cells are often used as a way to obtain neutralized beams of energetic particles. In this blog post, we introduce a model of a simple charge exchange cell and analyze its neutralization efficiency.
An Analysis of Caustic Surface Generation at the Vdara® Hotel
Among its neighboring buildings on the Las Vegas strip, the Vdara® hotel can be identified by its unique crescent-shaped design. While visually appealing, this architectural element became an area of concern as it contributed to the development of a caustic surface on the hotel’s pool deck. As a result, guests at particular locations experienced severe sunburns at certain days and times of the year. Here, we model the generation of a caustic surface in the case of the Vdara® hotel.
Automatic Meshing for Electromagnetic Simulations
Here’s a question for all you electromagnetics-focused simulation engineers out there: Have you ever looked in envy at your structural, fluid, and chemical counterparts as they mesh their models with the click of a button, while you struggle to mesh your infinite elements or perfectly matched layers? Well, now you too can enjoy automatic meshing with a click (or two). Let me show you how.
Modeling Ray Propagation in a Newtonian Telescope System
When the Newtonian telescope was first developed in 1668, it was recognized as the earliest operating reflecting telescope. With its low cost and simplistic design, this optical system became a favorable alternative to refracting telescopes, and the technology continues to be widely used today. Using the Ray Optics Module, we can analyze ray propagation within this type of telescope system.
Investigating LED Efficiency via Multiphysics Simulation
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.
New Accumulators Boost Particle and Ray Tracing Functionality
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.
Modeling Thermally Induced Focal Shift in High-Powered Laser Systems
Almost all media absorb electromagnetic radiation to some extent. In high-powered laser focusing systems, a medium such as a glass lens may absorb enough energy from the laser to heat up significantly, resulting in thermal deformation and changing the material’s refractive index. These perturbations, in turn, can change the way the laser propagates. With the Ray Optics Module, it is possible to create a fully self-consistent model of laser propagation that includes thermal and structural effects.
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