# COMSOL Blog

## MEMS Tutorial: How to Simulate a Capacitive Pressure Sensor

##### Phil Kinnane | July 24, 2012

Looking for a tutorial on how to model a MEMS problem? We have recently added a video tutorial using the example of how to simulate a capacitive pressure sensor to our video gallery. For a brief overview of what you can model in the MEMS Module watch the trailer below, or go straight to the bottom of this post for a link to download the model files, which show how to produce this type of electromechanics model.

### Impedance Boundary Conditions Help in Modeling Non-Destructive Testing (NDT)

##### Phil Kinnane | July 23, 2012

How do you simplify a 3D geometry to reduce the computational resources required to model it? Do it in 2D. What if the phenomenon can only be properly simulated in 3D? Find the planes of symmetry and reduce the size, most engineering objects are symmetric in some way. What if there is no symmetry, such as the propagation of random cracks through a steel pipe? Well, as this story from COMSOL News shows, there are other methods, such as using […]

### Intra-Luminal Thrombus in Abdominal Aortic Aneurysms as a Multiphysics Problem

##### Fanny Littmarck | July 20, 2012

The most common type of aortic aneurysms is that which occurs in the abdominal region. When a person experiences an abdominal aortic aneurysm (AAA), his or her abdominal aorta is dilated to the extent that its diameter is increased by over 50%. With symptoms lacking a sense of urgency (we’ve all ignored stomach pains before), if left untreated an AAA may rupture — whereon the victim’s life is on the line. An Intra-Luminal Thrombus is typically involved in AAAs, but […]

### A Closer Look at the Physics Involved in Lava Lamps

##### Valerio Marra | July 19, 2012

Remember those retro desk ornaments of the 1960’s, those lamps filled with colorful wax that began to move when the lamp was lit? I’m talking about lava lamps, or as I like to call them, “Rayleigh–Taylor instability machines”. They may not be popular among today’s youth, but I still own one and I thought it would be interesting to look beyond the dyed blobs of wax and observe the physics involved in lava lamps.

### COMSOL is pleased to Welcome Amphos 21 as a Certified Consultant, First in Spain and South America

##### Phil Kinnane | July 18, 2012

Amphos 21 have long been experts within environmental consulting. In particular, they have been consulting for almost twenty years within nuclear and industrial waste management, the management of water resources and contaminated land, and energy optimization. It was therefore a pleasure to see that they had started using COMSOL Multiphysics for a number of their projects, and are now officially offering consultancy services for modeling multiphysics processes within these and similar industries.

### Lowering Water Levels by not Taking Away the Water

##### Phil Kinnane | July 17, 2012

Düsensauginfiltration (DSI) is a novel technique for lowering water levels at mining and construction sites while not actually having to transport the water away from these sites. This came to my attention at the latest COMSOL Conference in Stuttgart. There, Ph.D. student Yulan Jin and Assistant Professor Dr. Ekkehard Holzbecher from the Georg-August University in Göttingen, Germany was presenting their research into this groundwater lowering technique.

### See Pipe Flow in Action

##### Phil Kinnane | July 16, 2012

David Kan has previously blogged very well about the Pipe Flow Module, where he described the fundamentals behind this new product of ours. Now, you can see this module in action at a webinar run on July 19th. Check out the details and registration for the upcoming Pipe Flow Simulation Using COMSOL webinar.

### Investigating the Fundamentals of an “Old” Technology

##### Phil Kinnane | July 13, 2012

Transformers were first commercially used in the late 1800’s, but they are still being investigated at their fundamental levels. One of the stories from our latest COMSOL News concerns ABB (who themselves have been around since the late 1800’s) and their research into these apparatuses.

### COMSOL Conference Boston 2012 User Presentation Sessions

##### Jinlan Huang | July 12, 2012

I am pleased to announce that we have received 130 abstract submissions for the COMSOL Conference Boston! These have been sent off to our Program Committee for review and we’re looking forward to a great meeting with presentations of many different multiphysics applications. As the Program Committee Chair, it has been exhilarating to read how much is being done within the world of multiphysics modeling and simulations.

### Singing Sand Leads to Many Questions

##### Valerio Marra | July 11, 2012

I know, I know… I should spend the weekend relaxing. But every place I visit offers me a variety of natural phenomena I wasn’t aware of and, as an engineer and a multiphysics enthusiast, I can’t help but sit in the sun jotting down a list of the physics involved – possible coupling mechanisms, boundary conditions, materials, and so on (we talked about stereotypes attached to engineer on our