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How to Implement a Delay in Your Thermostat Simulation
Thermostats are used in most homes for controlling furnaces and air conditioners to maintain a comfortable interior temperature. A simple thermostat controlling a heater will have on and off setpoints....
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Part 1: Modeling the Harmonic Excitations of Linear Systems
In many engineering situations, we can assume that excitations on the system of interest and the responses are sinusoidal over time. When this assumption holds, we can use a so-called frequency-domain...
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Part 2: Modeling the Harmonic Excitations of Nonlinear Systems
Extending our discussion on modeling the harmonic excitations of linear systems, we will now shift focus to nonlinear systems. We will look at problems where the loading on the system has some...
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How to Model the Electromagnetic Heating of Underground Cables
Overhead power cables can be seen almost everywhere in the United States, but there are also many underground power cables that we can’t see. They have the advantage of protection from wind and snow...
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How to Compute Distances Between Objects in COMSOL Multiphysics®
Have you ever modeled deforming objects in the COMSOL Multiphysics® software and wanted to know the distance between them? In today’s blog post, we will look at how to compute distances between objects...
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How to Postprocess Fields over Arbitrary Geometries
Have you ever wanted to query the results of your model within an arbitrary geometric subregion? You might think that this requires adding geometries to a model and recomputing the solution. Instead,...
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3 Ways to Optimize the Current in Electromagnetic Coils
If you design electromagnetic coils, the combination of the AC/DC and Optimization modules with the COMSOL Multiphysics® software gives you the power to quickly come up with improved design iterations....
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How to Optimize the Spacing of Electromagnetic Coils
When designing electromagnetic coils, we may want to adjust the position of the coils to achieve a desired magnetic field strength within a particular region of space. This is possible to do within the...
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Modeling Natural and Forced Convection in COMSOL Multiphysics®
Whenever we have a heated or cooled part exposed to air, there is some transfer of heat from the part to the air via convection. The movement of the air can be either forced, via a fan, or free, as a...
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How to Create a Randomized Geometry Using Model Methods
Have you ever wanted to include a randomly created geometry in your model? Perhaps you want to simulate a natural material or an arrangement of parts that has some known statistical distribution of...
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How to Model the Optical Properties of Rough Surfaces
Whenever light is incident on a dielectric material, like glass, part of the light is transmitted while another part is reflected. Sometimes, we add a metal coating, such as gold, which alters the...
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How to Use Model Methods to Accelerate Your COMSOL® Workflow
Do you ever find yourself performing the same modeling operations over and over again in each new model file that you work with? Or do you work with colleagues who send you model files that you have to...
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Which Turbulence Model Should I Choose for My CFD Application?
The COMSOL Multiphysics® software offers several different formulations for solving turbulent flow problems: the L-VEL, algebraic yPlus, Spalart-Allmaras, k-ε, k-ω, low Reynolds number k-ε, SST, and...
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Should I Fillet the Geometry in My Electromagnetic Heating Analysis?
To fillet or not to fillet, that is the question (that can bedevil the multiphysics analyst). When building finite element models, sharp edges can lead to local singularities and fields that are...
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Common Pitfalls in Electrothermal Analysis
In applications such as power transfer and consumer electronics, it may be critical to model electromagnetic heating of materials that are nonlinear in temperature; that is, the material’s electrical...
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How to Model Conductors in Time-Varying Magnetic Fields
One of the more common uses of the AC/DC Module, an add-on to the COMSOL Multiphysics® software, is for modeling conductors and other lossy materials in time-varying magnetic fields when there are...
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3 Approaches to Modeling Moving Loads and Constraints in COMSOL®
One of the core strengths of the COMSOL Multiphysics® software is the ability to easily define loads and constraints that move over time. There are actually several different ways in which this can be...
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Using Discontinuous Meshes for Conjugate Heat Transfer Modeling
Did you know that the COMSOL Multiphysics® software allows you to have different discontinuous meshes in neighboring domains? Although the usual default behavior of the software is to use aligned...
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Building a Magnetohydrodynamic Multiphysics Model in COMSOL®
The COMSOL Multiphysics® software is built from the ground up to be multiphysics capable so that the user can easily combine models representing different physics phenomena in whichever way they wish....
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Join Us for Tech Cafés at the COMSOL Conference 2020 Boston
It’s already time to start thinking about the COMSOL Conference 2020. The Boston event will be held on October 7–9, just down the road from our U.S. headquarters. We’ve planned a number of significant...
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