# COMSOL Blog

## Overview of Integration Methods in Space and Time

##### Bettina Schieche | January 29, 2014

Integration is one of the most important mathematical tools, especially for numerical simulations. Partial Differential Equations (PDEs) are usually derived from integral balance equations, for example. Once a PDE needs to be solved numerically, integration most often plays an important role, too. This blog post gives an overview of the integration methods available in the COMSOL software and shows you how you can use them.

### Using the General Extrusion Coupling Operator in COMSOL: Dynamic Probe

##### Chandan Kumar | January 28, 2014

Here is an interesting question: How can we easily probe the solution at a point that is moving in time, but associated with a stationary geometry? One option is to use the General Extrusion coupling operator. In this blog post, we will take a look at how to use the General Extrusion coupling operator to probe a solution at a point in your geometry, and illustrate how to implement a dynamic probe using an example model.

### Modeling a Displacement Ventilation System

##### Alexandra Foley | January 27, 2014

There are, in general, two different types of ventilation systems: mixing ventilation and displacement ventilation. Displacement ventilation is used in large spaces with tall ceilings (at least three meters high), and therefore is mainly found in office buildings, schools, and other public spaces. These higher ceilings allow for upward convective flows exhausting air contaminants, thus resulting in improved air quality. This post explores the simulation of a displacement ventilation system to determine the air temperature and velocity within a room.

### Free Webinar Introducing the Mixer Module Next Month

##### Mark Fowler | January 24, 2014

Mixers with rotating components are essential in many industrial applications, including food production, manufacturing chemicals, pharmaceuticals, and other consumer products. While the industrial processes of mixers differ, product requirements like quality, reproducibility, and uniformity must remain constant. Using the Mixer Module is one way you can make sure these product requirements are met. In our upcoming webinar, you’ll learn how the fluid flow interfaces available in the Mixer Module allow you to streamline the design of mixers and their mechanisms.

### Hybrid Parallel Computing Speeds Up Physics Simulations

##### Pär Persson Mattsson | January 23, 2014

Twenty years ago, the TOP500 list was dominated by vector processing supercomputers equipped with up to a thousand processing units. Later on, these machines were replaced by clusters for massively parallel computing, which soon dominated the list, and gave rise to distributed computing. The first clusters used dedicated single-core processors per compute node, but soon, additional processors were placed on the node requiring the sharing of memory. The capabilities of these shared-memory parallel machines heralded a sea change towards multicore […]

### The 10th Annual COMSOL Conference Takes Place in 2014

##### Kristen O'Connor | January 22, 2014

We’re kicking off the new year right with the announcement of our COMSOL Conference 2014 tour dates and locations. This year marks the 10th annual COMSOL Conference and we have a lot of exciting things planned for you. Not only are we enhancing our program, but we have also added locations to the conference tour. Here’s a look at what to expect and in what locations.

### Now Live: MEMS and Piezoelectric Devices Showcase

##### Mark Fowler | January 21, 2014

We would like to welcome you to visit our brand new MEMS and Piezoelectric Device Showcase — a free, one-stop digital resource geared to inform you on the physics, applications, and industries as they pertain to modeling MEMS and piezoelectric devices. In the showcase, you will learn about a host of applications that can benefit from utilizing COMSOL simulation software. Rich content including videos, case studies, presentations, and example models are provided to help paint a clearer picture of everything […]

### Multiphysics Analysis of Advanced Materials: Ceramic Matrix Composites

##### Jeff Crompton | January 20, 2014

Today we have the pleasure of introducing Jeff Crompton, a guest author from AltaSim Technologies, who will discuss ceramic matrix composites and how to accurately analyze the production of such an advanced material. Ceramic matrix composites (CMCs) are fast becoming popular in many industries due to their ability to withstand high temperatures, corrosion, and wear better than metal components. They are being used in space applications, burners and combustion chambers, gas turbines, brake discs, and slide bearings. The manufacture of […]

### Modeling Electromagnetic Waves and Periodic Structures

##### Walter Frei | January 17, 2014

We often want to model an electromagnetic wave (light, microwaves) incident upon periodic structures, such as diffraction gratings, metamaterials, or frequency selective surfaces. This can be done using the RF or Wave Optics modules from the COMSOL product suite. Both modules provide Floquet periodic boundary conditions and periodic ports and compute the reflected and transmitted diffraction orders as a function of incident angles and wavelength. This blog post introduces the concepts behind this type of analysis and walks through the […]

### 2014 COMSOL Training Course Series Released

##### Lauren Sansone | January 16, 2014

Whether you are interested in an introduction to COMSOL Multiphysics or want to delve deeper into application-specific courses, you will want to check out the newly released 2014 Training Course series. This is your opportunity to advance your simulation skills and maybe show off to your colleagues how quickly you can set up and solve a complex model. At a COMSOL training course, you can learn tips and tricks from skilled application experts as well as the modeling of applications […]