## Model Deforming Objects with the Arbitrary Lagrangian-Eulerian Method

##### Edmund Dickinson January 17, 2018

As two of the greatest mathematicians to have ever lived, Leonhard Euler and Joseph-Louis Lagrange made numerous contributions to continuum mechanics. Combining their individual descriptions of the subject inspired the arbitrary Lagrangian-Eulerian (ALE) method, a technique that can be used for a multitude of simulation applications. Find out how the work of Euler and Lagrange helped create the ALE method and how it aids your simulations in the COMSOL Multiphysics® software.

### A Simulation Color Table for Engineers with Color Vision Deficiency

##### Caty Fairclough December 27, 2017

When looking through scientific papers, it’s common to see colorful results. Although aesthetically pleasing to some, these results can be difficult to interpret for engineers with color vision deficiency (CVD). You may think that presenting results in grayscale could help, but humans are less able to discern between different shades of gray. So what’s the best option here?

### 3 Examples of Equation-Based Modeling in COMSOL Multiphysics®

##### Caty Fairclough December 20, 2017

Creating new physics interfaces that you can save and share, modifying the underlying equations of a model, and simulating a wider variety of devices and processes: These are just a few ways you can benefit from the equation-based modeling capabilities of the COMSOL Multiphysics® software.

### How to Build Geometries from Elevation Data to Model Irregular Shapes

##### Hanna Gothäll December 19, 2017

In Part 2 of our blog series on how to model irregular shapes in the COMSOL Multiphysics® software, we focus on how to create a surface of an irregular shape based on elevation data stored in various formats such as text, an image, or a DEM file. This approach is best suited for data where the height (or elevation) is a function of x- and y-coordinates.

### What Happens If I Use 2 Different Unit Systems in 1 Simulation?

##### Amit Patil December 6, 2017

Measurements and units make our professional and personal lives orderly and systematic. Different unit systems have been used over time, but today there are two dominant systems: the metric and English unit systems. What happens when both unit systems are used for the same application? In this blog post, we will shed light on two historical disasters brought about by the use of different unit systems and highlight unique features of the COMSOL Multiphysics® software for handling different unit systems.

### How to Model Optical Anisotropic Media with COMSOL Multiphysics®

##### Uttam Pal December 4, 2017

On a bright evening in 1669, Professor Erasmus Bartholinus looked through a piece of an Icelandic calcite crystal he had placed onto a bench. He observed when he covered text on the bench with the stone, it appeared as a double image. The observed optical phenomenon, called birefringence, involves a beam of light that splits into two parallel beams while emerging out of a crystal. Here, we demonstrate a modeling approach for this effect.

### Modeling Irregular Shapes: How to Import Curve Data and Loft a Solid

##### Hanna Gothäll September 20, 2017

Irregular shapes can come in several different formats. For example, we have previously discussed importing STL files and NASTRAN® meshes into the COMSOL Multiphysics® software. These formats are common when working with scanned biological data. In this blog series, we will look at different ways of handling irregular shapes in COMSOL Multiphysics.

### The Optimal Workflow for Complex Modeling Projects on a Deadline

##### Ruud Börger August 22, 2017

Have you ever feared a deadline because your model took longer to solve than expected? Here, we discuss common causes of time delays and how to prevent them. Let’s start with a real-world example: solving a complex modeling project on a deadline.

### How to Create Electrostatics Models with Wires, Surfaces, and Solids

##### Bjorn Sjodin August 8, 2017

The latest version of the AC/DC Module enables you to create electrostatics models that combine wires, surfaces, and solids. The technology is known as the boundary element method and can be used on its own or in combination with finite-element-method-based modeling. In this blog post, let’s see how the new functionality can be used to conveniently set up a model that includes a number of very thin spiral wires.

### How to Create Graphs with Two Y-Axes in COMSOL Multiphysics®

##### Andrew Griesmer July 27, 2017

Have you ever tried to plot multiple quantities on one graph, only to realize that the scales don’t match up? You can solve this problem by adding a second y-axis to your 1D plot to include two scales of values. In the video below, we introduce a case where you would want two y-axes. We then show you how to add a second y-axis to your graph and create helpful annotations in the COMSOL Multiphysics® software.

### New FEM Book Offers Modeling Guidance for Biomedical Applications

##### GuestGuigen Zhang July 20, 2017

Today, guest blogger Guigen Zhang, professor of bioengineering at Clemson University, talks about his new textbook on computational modeling for biomedical applications. This blog post discusses Integrative Engineering: A Computational Approach to Biomedical Problems, including its content and the intended readers; the purpose and motivation for writing this book; and most importantly, how getting an in-depth understanding of the “intricate machinery” of computational modeling will help make you a better modeler.