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Using AI Tools to Simplify Data Transfer and File Conversion
A perennial challenge when using simulation software such as COMSOL Multiphysics® is how to efficiently bring in and convert data from other sources. The first few times such a task crosses your desk,...
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Inductive Heating of Temperature-Dependent Magnetic Materials
One of the challenges in the field of inductive heating is the modeling of the nonlinear properties of the materials being heated. All materials are nonlinear with temperature; magnetic materials are...
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Modeling of Excitations with the Magnetic Field Formulation
When using the AC/DC Module, an add-on to the COMSOL Multiphysics® software, there are five interfaces within which we can model time-varying magnetic fields and inductive effects. Each solves a...
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Thoughts on AI and CEM43 in Medical Device Design
I recently had the pleasure of attending the Medical Device Innovation Conference (MDIC), which included interesting talks about computer modeling and simulation, as well as the impact of AI on...
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Modeling Refraction with the Heat Transfer Module
Version 6.4 of the COMSOL Multiphysics® software expands the Surface-to-Surface Radiation capabilities of the Heat Transfer Module to include specular refraction (in addition to specular reflection)...
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Modeling Electrical Contact Resistance at Bolted Joints
With the release of version 6.3 of the COMSOL Multiphysics® software, there is a new Interior Contact boundary condition available in the Solid Mechanics interface. This boundary condition simplifies...
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Solving Delay Differential Equations to Model…Marmots?
With the release of version 6.3 of the COMSOL Multiphysics® software, it is now possible to use previous solutions from a time-dependent study at the current time step. That is, the solution from an...
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Modeling Absorption and Scattering of Collimated Light
When a ray of collimated light, such as from a laser, is incident upon a semitransparent medium, it can experience both absorption and scattering. This means that the incident light is both converted...
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Treating Time as a Space Dimension
Certain modeling problems can lead to particularly elegant solutions. One such case recently presented itself in the form of finding the time-periodic stationary solution to a problem involving a...
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Using Differential Inductance and Coils in COMSOL Multiphysics®
When modeling a low-frequency electromagnetic system involving coils, nonlinear materials, magnets, and moving parts, we are often interested in computing the differential inductance. Differential...
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Learning from the Two-Capacitor Paradox: Do Capacitance and Inductance Exist?
The two-capacitor paradox is a provocative thought experiment set up to expose some of the limitations of electrical circuit modeling, and many different ways of resolving the paradox have been...
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Understanding Higher-Order Diffraction
When a plane wave of electromagnetic radiation, e.g., light, is incident upon a planar periodic structure, higher-order diffraction may occur. This means that the light will not only reflect and...
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Modeling Dispersion in an Electric Currents Model
With the release of version 6.2 of the COMSOL Multiphysics® software, electrical dispersion modeling capabilities can now be extended to the Electric Currents interface, which supports both time- and...
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Modeling Periodic Electric Signals and Their Thermal Effects
There are many situations where you may be interested in modeling periodic, albeit nonsinusoidal, electrical signals for the purposes of computing the resultant electric fields, thermal losses, and...
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Understanding the Transient Electromagnetic Excitation Options
If you are modeling electrical signals that are varying arbitrarily in time, you can often use the computationally efficient Electric Currents interface in the COMSOL Multiphysics® software to compute...
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Understanding the Excitation Options for Modeling Electric Currents
If you are using the Electric Currents physics interface in COMSOL Multiphysics® for the modeling of electromagnetic heating, you may have noticed that there are many different ways of exciting a...
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Using Different Physics Interfaces for RF Electromagnetic Heating Models
The COMSOL Multiphysics® software is well suited for modeling RF heating, where one needs to solve for both the electromagnetic fields and the temperature distribution over time. Although you might...
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Combining Volumetric Conductor Models and Lumped Elements
Are you ever in the situation of modeling the AC current distribution within conductors that are connected to lumped circuit elements such as capacitors, resistors, and inductors — but you do not want...
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Modeling the Pulsed Laser Heating of Semitransparent Materials
It’s quite common to use focused laser light to rapidly heat materials for various purposes, including within the semiconductor processing industry. Here, we will look at a Gaussian profile laser beam...
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Intro to Modeling Transient Heating of Solids in COMSOL Multiphysics®
The COMSOL Multiphysics® software is often used for modeling the transient heating of solids. Transient heat transfer models are easy to set up and solve, but they aren’t without their difficulties to...
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