Latest Posts
Nonstandard Constraints and the Power of Weak Contributions
For a flexible and physics-independent way to extend the applicability of the COMSOL Multiphysics® software, you can implement nonstandard constraints using the so-called weak contributions.
How to Use Numeric Ports in Your RF Analyses
When performing RF analyses in the COMSOL® software, you can use numeric ports to compute the mode of a port with an arbitrary shape. This demonstration includes a waveguide adapter example.
Photos from the COMSOL Conference 2018 Boston
Take a look at our photo album from the COMSOL Conference 2018 Boston for scenes and highlights from the 3-day event.
Happy Birthday, Robert Hutchings Goddard
Robert Hutchings Goddard is considered the “Father of Modern Rocketry”. Read about how he went from reading science fiction to making strides in scientific innovation.
Improving Architectural Designs with Building Physics Simulation
Building physics simulation can help engineers develop more energy-efficient architectural designs. We talked to Built Environments, Inc. to get a few examples of how.
Introducing COMSOL Multiphysics® Version 5.4
COMSOL Multiphysics® version 5.4 includes a variety of updated features and functionality as well as 2 exciting new add-on products: the Composite Materials Module and COMSOL Compiler™.
Happy Birthday, Nora Stanton Blatch Barney
In the early 1900s, Nora Stanton Blatch Barney, a civil engineer, assisted in constructing bridges with the American Bridge Company and building subway tunnels in New York City.
How to Implement the Weak Form for Time-Dependent Equations
Here’s a comprehensive equation-based modeling guide on how to implement the weak form for time-dependent equations, including theoretical background and step-by-step instructions.
RF Signal Transformation Between the Time and Frequency Domains
Want to make your RF and microwave device modeling more efficient? Read this blog post to learn how to implement the fast Fourier transform in your simulations.
Image Denoising and Other Multidimensional Variational Problems
Learn how to solve variational problems featuring multiple dimensions, higher-order derivatives, and multiple unknowns with a fun example: image denoising in a grainy photograph.
Studying the Peltier and Seebeck Effects in Thermoelectric Devices
We go over 2 key concepts in themoelectricity, the Seebeck and Peltier effects, and how to account for them when simulating heating and cooling in thermoelectric devices.
Methods for Enforcing Inequality Constraints
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
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
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
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
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
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
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
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.
Seeing Through Solids: Discovery and Applications of Photoacoustics
The field of photoacoustics started with Alexander Graham Bell and some sunlight. Now, photoacoustic imaging is used for nearly anything involving generating images of opaque material samples.
How to Model Ion-Exchange Membranes and Donnan Potentials
Get an introduction to the theory behind the Nernst-Planck-Poisson equations, Donnan potentials, and how to model ion-exchange membranes in batteries and fuel cells.
How to Model Sparging in COMSOL Multiphysics®
Sparging, the process of bubbling a gas into a liquid, is seen most notably in carbonation, such as for soda and seltzer water. This mass transfer process can be modeled in COMSOL Multiphysics®.
Examining Vibration in a Lumped Model of the Human Body
Engineers working to reduce the effects of whole body vibration (WBV) in transportation methods can analyze their systems and designs using a lumped model of the human body.
How to Place Inlet and Outlet Boundary Conditions in CFD Simulations
When setting up fluid flow simulations, at what distance can we apply boundary conditions without interfering with the process? Here, we discuss how to place inlet and outlet boundary conditions.