Mads Herring Jensen | February 27, 2014

When sound propagates in structures and geometries with small dimensions, the sound waves become attenuated because of thermal and viscous losses. More specifically, the losses occur in the acoustic thermal and viscous boundary layers near the walls. This is a known phenomenon that needs to be included when studying and simulating systems affected by these losses in order to model these systems correctly and to match measurements.

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Ahsan Munir | February 26, 2014

DNA is a complex molecule that contains instructions for life and often referred to as a “digital fingerprint” or code telling a cell what to do. DNA is often the only means for accurate testing and identification of biomolecules, cells, or even an entire person during forensic investigations. The need to be able to test for DNA, as quickly as possible, and even at the site where the sample is taken, is becoming more and more important.

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Andrew Griesmer | February 25, 2014

A circulating fluidized bed (CFB) is used to create a homogeneous mixture of gas (usually air) and solid particles to increase the efficiency of the combustion process in boilers. A better understanding of this process will help engineers to optimize their design parameters based on their individual needs. The Circulating Fluidized Bed model in COMSOL does just this, simulating a CFB with a given set of parameters that are easily interchangeable, depending on the needs of the user.

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Mark Fowler | February 24, 2014

Submarines can be detected by enemy weapon systems due to their magnetic signatures. By designing vessels with reduced magnetic signatures, detection can be avoided, but the composition and size of most submarines often make simulation difficult. COMSOL software helps you overcome this problem.

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Phil Kinnane | February 21, 2014

It must be an impressive sight. For people driving through the Mojave Desert from Los Angeles to Las Vegas, the world’s largest solar-based thermal power plant can be seen on the way. The Ivanpah Solar Electric Generation System consists of almost 350,000 garage door-sized mirrors, all pointing the sun’s rays to large boilers at the top of three 33-story tall towers. The result is a 390 MW power station — about a fifth the generation capacity of the Hoover Dam.

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Pär Persson Mattsson | February 20, 2014

In the latest post in this Hybrid Modeling blog series, we discussed the basic principles behind shared memory computing — what it is, why we use it, and how the COMSOL software uses it in its computations. Today, we are going to discuss the other building block of hybrid parallel computing: distributed memory computing.

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Fanny Littmarck | February 19, 2014

On this day, in the year 1473, now famous astronomer Nicolaus Copernicus was born in Torun, Poland. His main contribution to science was the controversial concept of a heliocentric universe. Five hundred years later, we not only accept the sun as the center of our solar system, we even support new theories of planets orbiting two stars at once.

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Jorge Molinero | February 18, 2014

Today, we are pleased to introduce a new guest author, Jorge Molinero of Amphos 21, a COMSOL Certified Consultant, who blogs about their new iCP technology. Along with several other parties, we at Amphos 21 have launched iMaGe, a multiphysics and geochemistry interfacing platform. The platform’s first product, iCP, connects COMSOL and PHREEQC, enabling the modeling of coupled Thermo-Hydro-Mechanical-Chemical phenomena.

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Walter Frei | February 17, 2014

COMSOL’s Optimization Module is a powerful tool for improving the performance of your devices and systems. Here, we will look at optimizing the power applied to two heaters in a flow channel with the objective of heating up the fluid as much as possible as it passes through the channel, while constraining the peak temperature at the heaters themselves. One application of this technique is improving the efficiency of thermal processes.

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Supratik Datta | February 14, 2014

The direct and inverse piezoelectric effects are strongly related to how anisotropic the material is, which in turn is related to the crystalline structure of the piezoelectric material. The extent of anisotropy can also be influenced by a process called poling. Here, I’ll discuss how you can correctly model the crystal orientation and poling direction of a piezoelectric material in your COMSOL simulations.

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Eyal Spier | February 13, 2014

Chemical reaction engineering is an interesting modeling challenge. At first glance, describing a reacting system seems to be very manageable. There remain, however, countless complications and pitfalls that make chemical simulations both challenging and rewarding. In this first post of a new blog series, we will introduce chemical kinetics in general and walk you through how you can use COMSOL software in chemical reaction engineering.

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