SOLIDWORKS Flow Simulation 2018 adds Noise Prediction

Noise prediction capability is available in SOLIDWORKS Flow Simulation 2018.

The ‘Acoustic Power’ option activates the calculation of a noise level prediction. This acoustic power level uses the “Proudman’s formula” for calculation. This formula is one of the known steady-state approaches in Computational Fluid Dynamics.

Proudman’s approach yield acoustic power due to unit volume of isotropic turbulence in W/m³ as:

Equation (1)

Where u and l are the turbulence viscosity and length scales, respectively. Also, ^α₀ is the speed of sound and ^α  in equation (1) is a model constant. Equation (1) can be rewritten as follows in terms of k and e (epsilon):

Equation (2)

Wherein,

Equation (3)

The rescaled constant of α_ε is considered as 0.1 in SOLIDWORKS Flow Simulation based on the calibration of Sarkar and Hussaini.

SOLIDWORKS Flow Simulation can also report the acoustic power in dB, which is computed from equation (4):

Equation (4)

Wherein P_ref  is the reference acoustic power and considered as 1.00e-12 W/m³.

Noise Prediction Parameters

Note: the noise prediction added to Flow Simulation package as of 2017 SP.3 version.