Discussion Forum

October 3, 2012 2:34pm UTC

COMSOL Releases COMSOL Multiphysics version 4.3a

We at COMSOL are proud to introduce version 4.3a of COMSOL Multiphysics to the COMSOL community

See: www.comsol.com/products/4.3a/

This introduces:
* LiveLink™ for Excel®
* LiveLink™ for Solid Edge®
* The ECAD Import Module
* The Fatigue Module

Other major features include:
* Cloud computing support on Amazon's EC2™
* Faster parallel processing
* Improved parametric optimization

To read the press release got to: www.comsol.com/press/news/article/895/

Enjoy!

Phil

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

October 9, 2012 6:28pm UTC in response to Ivar Kjelberg

Re: COMSOL Releases COMSOL Multiphysics version 4.3a

Hi Ivar,
All COMSOL Conference attendees in Boston, Milan, and Bangalore will be able to download a trial version of COMSOL Multiphysics and its add-on products for use at the event.
Best regards,
Bernt
COMSOL

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

October 16, 2012 2:23pm UTC in response to Simppa AEkaeslompolo

Re: COMSOL Releases COMSOL Multiphysics version 4.3a

The Full DVD image offered for download seems corrupted (too small, truncated files) as of today. The linux 64 full installer refused to proceed due to SOCKS proxy errors. I was finally able to install off the Compact DVD iso, I still have to figure out what am I missing.

Enrico

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

October 20, 2012 4:33pm UTC in response to Ivar Kjelberg

Re: COMSOL Releases COMSOL Multiphysics version 4.3a

There is a new tutorial for the acoustics module included with the title:
"Nonlinear Acoustics: Modeling of the 1D Westervelt Equation".
This is something excellent, and elegantly simple to implement even with the 4.3 version.
It models the wave deformation due to the changing speed of sound in high pressure areas.

However, it does not take into account the effect of the absolute pressure on the shape of the waves.
For example the fluid in the example was water, and it was not possible to set an initial custom absolute pressure for it. The acoustic pressure amplitude was 1e6 Pa which is about 10 times greater than the absolute pressure of the fluid under atmospheric conditions. This means that with an initial atmospheric absolute pressure, the wave shape can not be symmetric as in the study results, because this would form a -9e5 Pa negative absolute peak pressure which is not possible. So we would expect cavitation and an asymmetric waveform.

My question is whether it is possible to tweak the model to take the effect of the absolute pressure into account as well, and provide a very realistic simulation? If yes, then how to do it?

Thanks,
Joe

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse

November 20, 2012 7:12pm UTC in response to Ivar Kjelberg

Re: COMSOL Releases COMSOL Multiphysics version 4.3a

There are a lot of new features, models and modules in 4.3a. The feature that I benefitted from the most so far is the new pseudo-time stepping for stationary FSI problems.

Reply  |  Reply with Quote  |  Send private message  |  Report Abuse