## Recursion and Recursively Defined Geometry Objects

##### Bjorn Sjodin July 17, 2019

Broadband antennas and metamaterials are 2 fields of engineering in which recursively defined geometry objects are a useful modeling capability. Writing methods makes this task easier.

### How to Automatically Remove Small Details in Your Model Geometry

##### Hanna Gothäll July 12, 2019

Have you ever wished for an automatic way to remove small details in your model geometry that are causing an unnecessarily fine mesh or a poor mesh quality? Enter the Remove Details operation.

### Optimizing Lubricated Systems with Numerical Simulation

##### Thomas Forrister July 11, 2019

Experts at SIMTEC designed a lubricated mechanical contact using numerical modeling and built an application for optimizing the use of lubrication in rolling and sliding bearings.

### Best Practices for Meshing Domains with Different Size Settings

##### Ellen Krusell July 9, 2019

Tip 1: Choose the order of your meshing sequence operations. Tip 2: Use a single operation to mesh multiple domains. Keep reading to learn how to ensure the high-quality meshing of model domains.

### Predicting the Unpredictable: Simulating Earthquake Mechanics

##### Brianne Christopher July 5, 2019

In case of an earthquake, people regularly practice hiding under their desks. Another way to prepare? Using response spectrum analysis to determine the structural stability of a building subject to this type of seismic event.

### What Do Lobster Shells Have to Do with Body Armor?

##### Brianne Christopher July 3, 2019

Believe it or not, lobster are potentially paving the way for innovations in body armor and soft robotics due to the unique properties of the translucent membrane on the underside of their tails.

### Happy Birthday, Maria Goeppert Mayer

##### Thomas Forrister June 28, 2019

2, 8, 20, 28, 50, 82, and 126 were the “magic numbers” that led Maria Goeppert Mayer to develop the first mathematical model for nuclear shells in an atom.

### How to Automate Meshing in Frequency Bands for Acoustic Simulations

##### James Gaffney June 26, 2019

There is a large frequency range involved in acoustics phenomena, which means that modeling acoustics problems requires meshing a large wavelength range. COMSOL® offers an efficient way to do so.

### Analyzing Vibrations in Rotating Machinery Due to Bearing Misalignment

##### Prashant Srivastava June 25, 2019

You can use structural analysis to compare the angular velocity, axial displacement, and bearing reaction moment on the shaft for rotating machinery with aligned and misaligned bearings.

### Automatic Time Step and Order Selection in Time-Dependent Problems

##### Jan-Philipp Weiss June 20, 2019

Here’s an intro to the time-dependent solver log in COMSOL Multiphysics® and an in-depth look at the theory behind discrete time-stepping schemes and optimal time steps and discretization orders.

### Building a Magnetohydrodynamic Multiphysics Model in COMSOL®

##### Walter Frei June 19, 2019

Magnetohydrodynamic models call for fluid dynamics and electromagnetics couplings. To do so, you can set up bidirectional couplings between all physics equations or building a simplified model.