[tog]

Hi

I am new to OpenFoam. Is it well suited for low Mach aeroacoustic problems ?
Is there anybody having done some tests in this area ?

Best Regards
Guillaume

[guido_adriaensen]

Hello,

I would be interested in this as well.
I did find a short reference to OF en aeroacoustics, but could not find any comparison with other experiments and/or other CFD solvers.

Guido

[lillberg]

I've done some validations for vortex induced acoustic resonance in deep cavities at Ma 0.1 using LES (the coodles code). The results agree well with the experiments by Yang, Y. in his PhD thesis "Generation of Tones due to Grazing Shear Flow Past a Deep Cavity", Lehigh University (2005)).

For general acoustic simulations the fluctuating pressure field from an LES is well suited as source terms for far field simulations. There is, however, no OF code readily available for far field predictions.

Regards

//Eric

[richard]

Hi,

I've just finished doing a reasonable amount of work on cylinder aeroacoustics, using both icoFoam and turbFoam to get source data for use in Curle's method - also investigated periodic holes as a noise reduction mechanism. These worked well, but LES would be better. Drop me an email if you would like some results.

With any luck, I'll be starting my PhD in January on shape optimisation for reduced aerofoil trailing edge noise, using OpenFOAM.
I would love to get in contact with anyone else using OpenFOAM for aeroacoustics..


Regards,

Richard

[yekaniyasari]

Hi Richard
I want to know the ability of OpenFOAM in aeroacoustics problems. In the source of this software I could not find any direct solver for these applications. Is it necessary to change the OpenFOAM solver for this goal? If you have any solved problem, I appreciate, if it is possible for you to send it for me.

Regards

[richard]

Hi Yekani,

Your right there isn't a direct solver for aeroacoustics (except DNS of course!), but OF is great for getting source data to use in uncoupled computations. (e.g. turbulent stresses to use in lighthill's equn or liftDrag to get body forces for compact noise sources) but you would need to make some post-processing code to get the acoustic field (LEE or otherwise) from this source data.

Feel free to email me and we can chat about it further

Richard.

[412412can]

Hi Richard
if i have already got the lift/drag from OF,how should i use them to compute the body forces for compact noise sources.
Regards

[mrshb4]

Hi Richard
I'm just starting my master thesis on noise prediction of centrifugal fans using openfoam.As my first step I will use RANS to find pressure fluctuations. It would be great to be in touch with you.
here is my email:
mrshb4@gmail.com

I wonder if I could have your email too!!!

Best regards
Mohammadreza Shetab

[Francesca Scaramuzzino]

Hi Richard,
I wonder if you could chat with me about aeroacoustics because I would like to adopt OpenFoam for thermoacoustics interactions but I don't know neither how I could use it for aeroacoustics problems..so I give you my e-mail adress: francesca.scaramuzzino86@gmail.com...I would be very happy if you could contact me.

Best Regards

Francesca