Flow noise in the time domain

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Hello there,

I noticed that COMSOL provides a case study on flow noise (Cavity Flow Noise Application ID: 105021), but the noise results obtained are all analyzed in the frequency domain. Can we obtain the noise results in the time domain at a certain monitoring point?

Thank you all in advance.


1 Reply Last Post 2026年3月12日 GMT+8 19:38
COMSOL Moderator

Hello 浩 张

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Mark Cops COMSOL Employee

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Posted: 2 hours ago 2026年3月12日 GMT+8 19:38

Hello 浩 张,

Any results from the frequency domain can be transformed to the time domain using the Frequency to Time FFT step.

Furthermore, there is a functionality to compute the flow noise in the time domain directly using the Linearized Perturbed Compressible Equations (LPCE) that is valid for low Mach number. See here: https://www.comsol.com/model/cylinder-flow-dipole-tonal-noise-using-the-lpce-formulation-149361 .

-Mark

Hello 浩 张, Any results from the frequency domain can be transformed to the time domain using the Frequency to Time FFT step. Furthermore, there is a functionality to compute the flow noise in the time domain directly using the Linearized Perturbed Compressible Equations (LPCE) that is valid for low Mach number. See here: https://www.comsol.com/model/cylinder-flow-dipole-tonal-noise-using-the-lpce-formulation-149361 . -Mark

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