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All posts by Walter Frei

Introduction to Computing Radiative Heat Exchange

February 10, 2022

Follow along as we continue our discussion on the foundations of radiative heat transfer modeling. (Part 3 of 3)

Modeling Incident Radiation in Radiative Heat Transfer

February 3, 2022

Get an introduction to modeling incident radiation on a surface with the Surface-to-Surface Radiation interface in the Heat Transfer Module. (Part 2 of 3)

Modeling Emissivity in Radiative Heat Transfer

January 27, 2022

In Part 1 of a blog series on modeling radiative heat transfer, we discuss the concept of surface emissivity.

How to Compute the Projected Area of a CAD File in COMSOL®

January 20, 2022

Learn about three approaches to computing the projected area of a CAD file and when to use each one.

How Long Does It Take an Engineer to Turn on a Light Bulb?

January 5, 2022

Misconception about electricity: Electrons carry the energy in an electrical circuit. Today, we investigate this theory with simulation.

Wrapping and Warping Geometries for Analysis in COMSOL®

September 10, 2021

CAD parts are typically designed in an undeformed, as-manufactured state. When it comes to analysis, however, we are only interested in the deformed, as-assembled state.

Voltage and Ground When Modeling Wave-Like EM Fields

June 17, 2021

We continue our discussion of voltage and ground by defining and interpreting these terms for sinusoidally time-varying electromagnetics models.

Do Voltage and Ground Exist?

June 15, 2021

Remember how the terms “voltage” and “ground” were taught in your university electrical engineering classes? Get a precise definition (in terms of modeling computational EM problems) here.