Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Dynamic Data Extension
Posted 2017年1月27日 GMT-5 12:00 Acoustics & Vibrations, Results & Visualization Version 4.4 1 Reply
Please login with a confirmed email address before reporting spam
Hello,
I'm interested in the inner workings of the dynamic data extension feature for creating animations. It's a very useful tool for visualizations and it works great, but I'm wondering about the computation processes that COMSOL uses to create the dynamic graphics.
I have two models using the eigenfrequency study in acoustics module. One is a simple standing wave tube, the other is the same tube with a feedback loop which results in a traveling acoustic wave. The dynamic data extension animations show the two wave types very clearly, however from the data that I am able to export (amplitude of the acoustic pressure as a function of position in the tube) it is impossible to determine whether the wave is standing or traveling (since there is no information about evolution of the wave over time).
I was hoping to learn more about how COMSOL is able to generate an accurate time dependent animation in a frequency domain study. Thanks in advance. I'm new to the software so any help is appreciated.
I'm interested in the inner workings of the dynamic data extension feature for creating animations. It's a very useful tool for visualizations and it works great, but I'm wondering about the computation processes that COMSOL uses to create the dynamic graphics.
I have two models using the eigenfrequency study in acoustics module. One is a simple standing wave tube, the other is the same tube with a feedback loop which results in a traveling acoustic wave. The dynamic data extension animations show the two wave types very clearly, however from the data that I am able to export (amplitude of the acoustic pressure as a function of position in the tube) it is impossible to determine whether the wave is standing or traveling (since there is no information about evolution of the wave over time).
I was hoping to learn more about how COMSOL is able to generate an accurate time dependent animation in a frequency domain study. Thanks in advance. I'm new to the software so any help is appreciated.
1 Reply Last Post 2017年1月27日 GMT-5 15:52
Please login with a confirmed email address before reporting spam
Posted:
8 years ago
Jesse,
the dynamic data extension can only show you the quantities along a harmonic cycle. There is just no time in the frequency domain. If you want to see temporal phenomena you have to run a time dependent study.
In case you have a frequency sweep you can transform to time domain by an FFT.
Cheers
Edgar
--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
the dynamic data extension can only show you the quantities along a harmonic cycle. There is just no time in the frequency domain. If you want to see temporal phenomena you have to run a time dependent study.
In case you have a frequency sweep you can transform to time domain by an FFT.
Cheers
Edgar
--
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com