Menu

Discussion Forum

New Discussion
Filtern

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 The information provided may be out of date.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.

How to set Acoustic Source

Posted 04.11.2009, 02:13 GMT-5 Version 3.5a 8 Replies

Oh Sue Ann
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi!

I have a question on the Acoustics module in Comsol, regarding how to set a monopole acoustic source.

I have a point acoustic source characterized by a modulated sin wave:

In Matlab coding,

y=-sin(2.*pi.*Freq.*Ts).*hanning(length(Ts))'

Here, the acoustic source is described in terms of particle displacement, y.

However, I understand that in Comsol, to set a point source, we are supposed to go to Physics > Point settings > Pressure acoustics, and select the type of source as flow, intensity and power.

My question is, how do we convert the description of the point source from displacement to a description in terms of either flow, intensity or power?

Thanks!
8 Replies Last Post 31.07.2014, 03:13 GMT-4
Bhargavaram Pachala
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 2 decades ago 09.11.2009, 16:48 GMT-5
Hi I have same problem. Did you find any solution for that? Please let me know.

Thanks
Aram
Hi I have same problem. Did you find any solution for that? Please let me know. Thanks Aram
Kiran Sahu
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 14.10.2010, 02:13 GMT-4
Hi,

I have the same problem as you had faced. Will you please tell me, how did you solve it ?

Thanks in advance,

Kiran
Hi, I have the same problem as you had faced. Will you please tell me, how did you solve it ? Thanks in advance, Kiran
Ying Peng
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 26.01.2011, 18:06 GMT-5

Hi!

I have a question on the Acoustics module in Comsol, regarding how to set a monopole acoustic source.

I have a point acoustic source characterized by a modulated sin wave:

In Matlab coding,

y=-sin(2.*pi.*Freq.*Ts).*hanning(length(Ts))'

Here, the acoustic source is described in terms of particle displacement, y.

However, I understand that in Comsol, to set a point source, we are supposed to go to Physics > Point settings > Pressure acoustics, and select the type of source as flow, intensity and power.

My question is, how do we convert the description of the point source from displacement to a description in terms of either flow, intensity or power?

Thanks!


Hi.

Have you figured out how to do yet? Thanks~
[QUOTE] Hi! I have a question on the Acoustics module in Comsol, regarding how to set a monopole acoustic source. I have a point acoustic source characterized by a modulated sin wave: In Matlab coding, y=-sin(2.*pi.*Freq.*Ts).*hanning(length(Ts))' Here, the acoustic source is described in terms of particle displacement, y. However, I understand that in Comsol, to set a point source, we are supposed to go to Physics > Point settings > Pressure acoustics, and select the type of source as flow, intensity and power. My question is, how do we convert the description of the point source from displacement to a description in terms of either flow, intensity or power? Thanks! [/QUOTE] Hi. Have you figured out how to do yet? Thanks~
Liu Antony
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 04.06.2011, 22:54 GMT-4
i have the similar question for setting the dipole source
i have the similar question for setting the dipole source
Ying Peng
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 08.09.2011, 17:24 GMT-4
Hi,

Have you figured out the problem yet?


Thanks
Hi, Have you figured out the problem yet? Thanks
Mads Herring Jensen COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 13.09.2011, 04:54 GMT-4
Hi all

When entering a flow point source in the frequency domain, the source amplitude S has the dimension m^3/s. In order to set the "radial displacement" U0 of the source you can enter S = U0*acpr.iomega*4*pi.

Best regards
Mads

Hi all When entering a flow point source in the frequency domain, the source amplitude S has the dimension m^3/s. In order to set the "radial displacement" U0 of the source you can enter S = U0*acpr.iomega*4*pi. Best regards Mads
MOAAZ
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 04.02.2012, 04:09 GMT-5
I too have a problem in something related to the above discussion. If anyone can explain how COMSOL solves the point source problems. The documentation doesn't explain much..
I too have a problem in something related to the above discussion. If anyone can explain how COMSOL solves the point source problems. The documentation doesn't explain much..
Zb Wang
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 31.07.2014, 03:13 GMT-4
Then how I can set Q in the monopole source whose dimension is 1/s^2 in 2D.
Then how I can set Q in the monopole source whose dimension is 1/s^2 in 2D.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content