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Standing Acoustic Wave thermoviscous acoustics

Posted Sep 24, 2020, 9:51 a.m. EDT Structural & Acoustics, Acoustics & Vibrations 3 Replies

Jason Collins
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Hi guys,

I'm trying to model a standing acoustics wave in thermoviscous acoustics, but when I use Background Acoustic Field to define my wave it doesn't give me a standing wave, I also used PML but it takes outer boundary as walls and doesn't yield a standing wave. Can anyone help me out? Note that my model is 2D and I want to use scattered wave formulation to compute scattered field psc.

Kind regards Jason

3 Replies Last Post Sep 24, 2020, 2:40 p.m. EDT
Edgar J. Kaiser Certified Consultant
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Posted: 4 years ago Sep 24, 2020, 10:40 a.m. EDT

Hi Jason,

I haven't tried it myself, but two background pressure fields with opposite propagation direction should do the job?

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Hi Jason, I haven't tried it myself, but two background pressure fields with opposite propagation direction should do the job? Cheers Edgar
Jason Collins
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Posted: 4 years ago Sep 24, 2020, 12:20 p.m. EDT

Hi Jason,

I haven't tried it myself, but two background pressure fields with opposite propagation direction should do the job?

Cheers Edgar

Hi Edgar,

I appreciate your response, I'm using thermoviscous acoustics and when I use any kind of background pressure field it just gives some pressure field not standing wave, someone told me to use PML but I don't know exactly how to use it with my microchannel. My goal is to use p=p+pb formulation to calculate scattered field off an object inside my microchannel.

Kind regards

>Hi Jason, > >I haven't tried it myself, but two background pressure fields with opposite propagation direction should do the job? > >Cheers >Edgar Hi Edgar, I appreciate your response, I'm using thermoviscous acoustics and when I use any kind of background pressure field it just gives some pressure field not standing wave, someone told me to use PML but I don't know exactly how to use it with my microchannel. My goal is to use p=p+pb formulation to calculate scattered field off an object inside my microchannel. Kind regards
Edgar J. Kaiser Certified Consultant
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Posted: 4 years ago Sep 24, 2020, 2:40 p.m. EDT

You can choose a 'user defined' background field and enter expressions that depend on the spatial variables and time to describe the standing wave.

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
You can choose a 'user defined' background field and enter expressions that depend on the spatial variables and time to describe the standing wave.

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