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Methods for Enforcing Inequality Constraints

September 17, 2018

Learn 2 methods for enforcing inequality constraints in your variational problems, the Lagrange Multiplier method and Augmented Lagrangian method, as well as the theory behind them.

Optimizing the Performance of a Dielectric Resonator Antenna

September 13, 2018

Dielectric resonator antennas (DRAs) have a storied history that began in the 1800s. Today, they are used in satellite, radio, and nanophotonics, and even show potential in 5G communications.

Methods for Dealing with Numerical Issues in Constraint Enforcement

September 11, 2018

This post is helpful if you use equation-based modeling: Learn a variety of different methods for dealing with numerical issues when enforcing constraints in variational problems.

Evaluating a Schottky Diode with a Semiconductor Benchmark Model

September 10, 2018

We present a model of a Schottky diode with benchmarked results, validating the use of simulation to analyze the performance of semiconductor devices.

Specifying Boundary Conditions and Constraints in Variational Problems

September 7, 2018

In part 2 of a blog series on solving variational problems in COMSOL Multiphysics®, we discuss how to specify general boundary conditions and constraints.

How to Model the Compression of a Hyperelastic Foam

September 5, 2018

When characterizing hyperelastic materials, how do you ensure accuracy? Here, we show how to model the compression of a sphere made of an elastic foam using experimental data.

Introduction to Modeling Soap Films and Other Variational Problems

September 4, 2018

In this introduction to a 5-part series, learn how to solve variational problems using equation-based modeling, which is useful for modeling soap films, catenary cables, light beams, and more.

Happy Birthday, Hermann von Helmholtz

August 31, 2018

Hermann von Helmholtz made major contributions to the fields of physiology, optics, electromagnetism, and more. He also notably challenged common perceptions in science using philosophy.


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