Noise Source Models Reference

The Proudman and Curle Noise Sorce Models allow you to compute the local acoustic power of quadrupole-generated noise (generated per unit volume) and dipole-generated noise (generated per unit surface), respectively.

Note	These models only solve for noise sources—not for acoustic wave propagation.

Table 1. Noise Source Models Reference
Model Names and Abbreviations	Curle		CU
	Proudman		PR
Theory	See Curle Noise Source Model and Proudman Noise Source Model.
Provided By	[physics continuum] > Models > Noise Source Models
Example Node Path	Continua > Physics 1 > Models > Curle
Requires	Space: Two Dimensional, Three Dimensional, Axisymmetric Time: Steady or Implicit Unsteady Material: any but solid Flow: any Viscous Regime: Turbulent Turbulence: Reynolds-Averaged Navier-Stokes Reynolds-Averaged Turbulence: any Optional Models: Aeroacoustics Aeroacoustics Models: Broadband Noise Sources Broadband Noise Source Models: Noise Source Models
Properties	Key properties are: Far-Field Density Far-Field Sound Speed Reference Acoustic Power See Noise Source Model Properties.
Activates	Field Functions	Curle Surface Acoustic Power (CU) Curle Surface Acoustic Power DB (CU) Mesh Frequency Cutoff Hz Proudman Acoustic Power (PR) Proudman Acoustic Power DB (PR) See Field Functions.

Noise Source Models Properties

Far-Field Density

The fluid density in the far-field,

ρ_{0}

in Eqn. (4665) (CU) and Eqn. (4678) (PR).

Far-Field Sound Speed

The speed of sound in the far-field,

c_{0}

in Eqn. (4660) (CU) and Eqn. (4678) (PR).

Reference Acoustic Power

The reference acoustic power

P_{r e f}

in the calculation of a model-specific acoustic power in dB:

The Curle model calulates the acoustic power per unit surface, see Eqn. (4666).
The Proudman model calculates the acoustic power per unit volume, see Eqn. (4682).

Field Functions

Curle Surface Acoustic Power (CU): The local acoustic power per unit surface in W/m², see $S A P$ given by Eqn. (4665).
Curle Surface Acoustic Power DB (CU): The local acoustic power per unit surface in dB, see $S A P (d B)$ given by Eqn. (4666).
Mesh Frequency Cutoff Hz: The frequency that the mesh can resolve in Hz. For more information, see Qualifying the Mesh for the Desired Sound Frequency.
Proudman Acoustic Power (PR): The local acoustic power per unit volume in W/m³, see $A P$ given by Eqn. (4680).
Proudman Acoustic Power DB (PR): The local acoustic power per unit volume in dB, see $A P (d B)$ given by Eqn. (4682).