Which Turbulence Model Should I Choose for My CFD Application?

Walter Frei | September 16, 2013

COMSOL Multiphysics offers several different formulations for solving turbulent flow problems: the L-VEL, yPlus, Spalart-Allmaras, k-epsilon, k-omega, Low Reynolds number k-epsilon, and SST models. All of these formulations are available in the CFD Module, and the L-VEL, yPlus, k-epsilon, and Low Reynolds number k-epsilon are available in the Heat Transfer Module. Learn about why we want to use these various turbulence models, how to choose between them, and how to use them effectively, with links to relevant models included.


Andrew Griesmer | September 13, 2013

Starting the design process by testing on a small scale is often the best way to tackle issues affecting large objects, like a ship. Detailed in COMSOL News 2013, researchers at INSEAN, The Italian Ship Model Basin, used small-scale testing and then simulation to analyze the effect of placing a sonar system within the bulbous bow at the hull of a ship. Using a small-scale model of a bulbous bow, the researchers at INSEAN performed fluid-structure interaction experiments, and subsequently […]

Walter Frei | September 10, 2013

A question we get asked all of the time is: “Which of the COMSOL products should be used for modeling a particular electromagnetic device or application?” There are currently six modules labeled as “Electrical” in the product suite; the AC/DC Module, RF Module, Wave Optics Module, MEMS Module, Plasma Module, and Semiconductor Module. The first four address applications purely governed by various forms of Maxwell’s equations, while the Plasma Module addresses the coupling of electromagnetic fields to plasma transport and […]


Nagi Elabbasi | September 6, 2013

Today we have the pleasure of welcoming Nagi Elabbasi of Veryst Engineering as a guest blogger. Read on to see what this COMSOL Certified Consultant has to say about fluid-structure interaction. Two weeks ago I led a webinar on fluid-structure interaction (FSI) using COMSOL Multiphysics. FSI involves coupling between a deformable or moving structure and a surrounding or internal fluid flow. There is a growing number of engineering and scientific problems where a purely structural or purely CFD analysis just […]

Valerio Marra | September 4, 2013

As a nuclear engineer, I’ve attended many thermal engineering classes. Whereas I’ve enjoyed learning techniques to enhance heat transfer, I’ve also found fascinating those applications where it is important to reduce heat transfer using the right choice and combination of materials and shapes. The design of this is vital for many industries, including the building and aerospace industries. Lately, I came across an interesting example of thermal insulation in the most mundane of these things: clothing design. I had to […]

Nandita Roche | September 2, 2013

Every year, we aim to make the COMSOL Conference a unique experience for our attendees, and we try to make each one better than before. This year, we are bringing a panel discussion to the COMSOL Conference Bangalore.


Alexandra Foley | September 11, 2013

Shell and tube heat exchangers are one of the most widely used type of heat exchanger in the processing industries (65% of the market according to H. S. Lee’s book, Thermal Design) and are commonly found in oil refineries, nuclear power plants, and other large-scale chemical processes. Additionally, they can be found in many engines and are used to cool hydraulic fluid and oil. There are a variety of different configurations for these heat exchangers, but their basic concept can […]

Phil Kinnane | September 9, 2013

Now is the time to start planning your visit to Boston for the COMSOL Conference 2013. If you would like to plan ahead in terms of which presentations to attend, you’ll be happy to hear that the abstracts for the Boston location are now being posted to the COMSOL Conference website. These will soon be followed by the abstracts for the Bangalore and Rotterdam user presentations as well.


Pär Persson Mattsson | September 5, 2013

In June it was time for the International Supercomputing Conference (ISC) in Leipzig, Germany. Many of the largest hardware and software vendors for High Performance Computing (HPC) were there to present new equipment, and the latest TOP500 list, a list of the fastest supercomputers, was presented as well. In a world where we continuously demand faster computations and higher resolution in our models, it’s not only necessary to have better hardware; we also need software that can handle the ever-growing […]


Alexandra Foley | September 3, 2013

It’s probably something we have all experienced. We get home, stick last night’s leftovers in the microwave, and sit down to have a nice meal — only to realize that the food is scalding hot one bite and freezing cold the next. This experience has prompted me on more than one occasion to wonder: Why does a microwave heat food so unevenly?

Walter Frei | August 30, 2013

Recently, I was given a copy of the book Finite Element Modeling Methods for Photonics, by B.M. Azizur Rahman and Arti Agrawal. This book proved to be a good companion to the RF Module and Wave Optics Module for graduate students starting in photonics and new users of COMSOL who would like a very targeted introduction to the field. The website accompanying the book comes with some sample computer codes used by the authors in simulation that readers can use […]

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