Posted: 3 weeks ago by:
Bernt Nilsson | Add your comment
Save Lives, Create Jobs, Keep the Earth Green and Win a Grand Prize of $20,000
New York, NY – The eighth “Create the Future” Design Contest (www.createthefuture2010.com) sponsored by PTC, COMSOL and Tech Briefs Media Group opens today and entries will be accepted through June 30, 2010. The contest is an opportunity to receive global recognition and a cash prize of $20,000 for a breakthrough product idea.
Past contests have generated over 1,000 design ideas annually from engineers, educators and students in more than 50 countries. Previous grand prize winning entries include a device that makes CPR easy and safe for anyone to perform, a fuel-saving motor/pump for cars and trucks, a low-cost in-vehicle emergency warning system, and a new type of energy-efficient lighting.
Click here to read the full Press Release
Posted: 2 months ago by:
Brian Kenyon | Add your comment
Resident multiphase flow expert Dan Smith discusses fixed and moving meshes for modeling immiscible two-phase flows. Here, readers learn the distinctions between the Level Set, Phase Field, and ALE methods. Relevant applications include micro-channel separation, electrocoalescence, inkjet modeling, injection molding, fuel system modeling, film boiling, and microfluidics. Read more
Posted: 3 months ago by:
Linus Andersson | 6 Comments
As most skilled COMSOL users, I am sure you know that you are not limited to just selecting what is in our drop-down lists. Say that you have invented your own measure of structural stress. You want it to be equal to the quadratic mean of the Tresca and von Mises stresses. Go to Plot Parameters to find out what these predefined stresses are called (tresca_smsld and mises_smsld if you are modeling in 3D with the Structural Mechanics Module). Now all you need to do is enter sqrt(0.5*(tresca_smld^2+mises_smld^2)) in any of the Expression fields and click OK to see your new stress distribution.
You probably didn't think of it, but in the expression I just mentioned, sqrt, ^, and even + are all examples of operators. COMSOL offers a whole range of useful ones, not all equally obvious. Did you for instance know that the letter d will differentiate any variable or expression with respect to time or space? d(c,z) gives the derivative of a concentration c with respect to the z-coordinate. d(sqrt(0.5*(tresca_smld^2+mises_smld^2)),t) is the time-derivative of your stress. If you have created your own subdomain expression my_stress containing your stress definition, d(my_stress,t) gives the same results.
The at operator lets you access the solution at any time in postprocessing. This is handy if you want to see changes over a time interval. Plotting the expression at(20,p)-at(10,p) overrides the Solution at time setting and shows you the pressure increase between 10 and 20 seconds. The with operator lets you postprocess more than one parametric or eigensolution in a similar fashion.
Another handy pair of operators is up and down. They live on boundaries and help you evaluate anything with discontinuities. Consider for example a temperature gradient on a boundary between two subdomains with different conductivities. gradT_ht will silently evaluate this gradient on both sides of the boundary and give you the average. With up(gradT_ht) and down(gradT_ht) however, you can decide which side you are interested in.
If you work with electromagnetics, you might have plotted the magnetic field in an eigenmode analysis only to find that it appears to be identically zero. Chances are it is non-zero but perfectly imaginary due to its 90-degree phase difference with a real-valued electric field. Use the imag operator to show its imaginary part, abs to plot the norm, or arg to see the phase angle. Note that the default plot for complex fields shows the real part.
This is just the tip of the iceberg. You can find the complete list of mathematical and other operators in the COMSOL Multiphysics Quick Start and Quick Reference.
Posted: 4 months ago by:
Bernt Nilsson | Add your comment
Users with floating network licenses can now run high-level simulations on any number of cluster nodes without additional fees.
PORTLAND, OR (November 16, 2009) — Today at the SC09, the premier international conference on High Performance Computing (HPC), COMSOL Inc., the leader in multiphysics simulation software, announced that with the upcoming release of COMSOL Multiphysics version 4.0 for Windows® HPC Server 2008 (HPCS) current users of a COMSOL Multiphysics® floating network license will have free and unlimited access to cluster compute power. The new COMSOL support for cluster computing means that any simulation job can now be deployed to any number of clustered computers at no additional cost to the user. Free support for cluster computing distinguishes COMSOL Multiphysics from other developers of simulation software who price their applications proportional to the number of computers and processors available to the user.
“COMSOL is the first developer of multiphysics software to take this step toward removing the financial barrier to large-scale simulation on cluster computing systems,” comments Bernt Nilsson, Sr. VP of Marketing with COMSOL, Inc. “Since multiphysics simulations can be computationally demanding, we have chosen to ensure our customers success by giving away the ability to run COMSOL Multiphysics simulations on any number of nodes free of charge.”
Click here to read the full Press Release
Posted: 4 months ago by:
Bernt Nilsson | 1 Comment
Multiphysics Conferences in Boston and Milan Draw More Than 700 Engineers, Researchers, and Scientists
Unveiling of COMSOL Multiphysics® 4.0 and keynote addresses by world’s leading practitioners of multiphysics modeling highlight fifth annual COMSOL Conference
BURLINGTON, MA (November 9, 2009) — More than 700 of the world’s top practitioners of multiphysics simulation recently gathered for the fifth annual COMSOL Conference in October. Complementary events were held in Boston and then Milan, Italy. The next stop for the annual world tour of this conference focused on multiphysics modeling and simulation for engineering and scientific research is Bangalore, India, November 13-14, 2009, followed by additional conferences in Shanghai, Beijing, Tokyo, and other locations.
Highlighting this year's events was the release of a beta edition of COMSOL Multiphysics 4.0, the newest version of the company's market-leading multiphysics modeling and simulation environment, which was distributed to all attendees and media contacts. Among the many enhancements in Version 4.0 is the COMSOL Desktop™, an all-new user interface that makes it easy for users to build and run simulations. (Note to Editors: Go here for the complete press release on COMSOL Multiphysics version 4.0.)
Read the Full Press Release Here
