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Far-field calculation of a duct outlet
Posted May 22, 2018, 4:30 a.m. EDT Acoustics & Vibrations Version 5.3a 1 Reply
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Hello,
I'm working on a model of a duct that has an outlet into a room, which is modeled as a semi-infinite space. A diagram of the 3D model is attached. The black part is the duct, the grey part is the room, which is surrounded by a PML (blue area). Both domains are filled with air. At the far end of the duct, I have added an incident plane wave.
I want to know the far field pressure in the room. However, I haven't been able to get good results from the far-field calculation. I just want to know the far field pressure in the room, but in my results all I see is a peak in the direction where the source is located.
Obviously I'm making a mistake in setting up my far-field calculation. But I don't have the faintest idea what I'm doing wrong. I'm hoping you can help me out. I've attached my COMSOL model. In this model the domain modeling the room has a larger radius than the duct, which is slightly different than in the attached diagram.
I hope someone can help me. Thanks in advance.
Kind regards,
Thijs Hekman
Attachments:
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Dear Thijs,
If you have an Access Account and access to an active COMSOL license, I would suggest sending your question to support@comsol.com for a swift reply. If you don't have access to a license, please contact me and we can discuss the possibility of a trial version.
Met vriendelijke groet, Best regards,
Yara Soares
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