[aslam9229]

I'm doing a fluent analysis on acoustic sensor. My objective is to generate a sound source on the sensor and and it should responds how much pressure is forced on the sensor. I have tried it in fluent. But the problem is when the sensor move away from sound source, the pressure increases on the sensor. but it shouldn't be increase. I'm following the attached paper.
Looking for your guide. Thanks


https://www.nature.com/articles/srep29957

[vinerm]

What kind of source are you providing? Is it a localized one?

And what models are you using in your case?

[vinerm]

Arslan, I recommend using the forum for discussions instead of PM.

You may share more details about your case, your approach, and issues so that users on the forum could help as well as learn.

[aslam9229]

Originally Posted by vinerm

What kind of source are you providing? Is it a localized one?

And what models are you using in your case?

Thanks for your reply. I am new to ansys. Can you tell me how to find which source I am providing?
My purpose is to generate pressure or sound waves on the sensor and the sensor acts accordingly as described in the Figure 3. Thank you

[vinerm]

If you don't know which source you are providing, then you, most likely, are not providing any. Sensor will record or move due to pressure fluctuations, however, something has to cause those fluctuations. It could be due to fluid coming in and going out through a few boundaries or it could be movement of a wall.

[aslam9229]

Originally Posted by vinerm

If you don't know which source you are providing, then you, most likely, are not providing any. Sensor will record or move due to pressure fluctuations, however, something has to cause those fluctuations. It could be due to fluid coming in and going out through a few boundaries or it could be movement of a wall.

Thanks for your reply. I did the following steps.

1. Select the Fluid Flow(Fluent)
2. In Geometry make a boundary around the sensor and apply a boolean (shown in the figure)
3. In Mesh, defined the inlet, outlet, and walls to the boundary and applied a mesh.
4. In solution, applied a boundary condition and select a pressure and calculated the result.

I don't know whether I have performed the steps correctly or not.
thank you

[vinerm]

Acoustics is just pressure fluctuations. You can either impose these pressure fluctuations in a quiescent fluid using a pressure wave or by modeling the flow using scale resolved simulations, such as, LES or at least using URANS. Somehow, you need fluctuations in the pressure field with time. I am not sure what you are doing right now; whether you have turbulence enabled or not and whether you are interested in a specific bandwidth or broadband. Modeling of a sensor is actually not required until and unless you are interested in modeling deformations of the sensor. If that is the requirement, then you will have to do FSI.

[Shamoon Jamshed]

Originally Posted by vinerm

Acoustics is just pressure fluctuations. You can either impose these pressure fluctuations in a quiescent fluid using a pressure wave or by modeling the flow using scale resolved simulations, such as, LES or at least using URANS. Somehow, you need fluctuations in the pressure field with time. I am not sure what you are doing right now; whether you have turbulence enabled or not and whether you are interested in a specific bandwidth or broadband. Modeling of a sensor is actually not required until and unless you are interested in modeling deformations of the sensor. If that is the requirement, then you will have to do FSI.

Dear Vinerm, my question is that when you define receivers, it only enables in FWH model. While defining receivers, it does allow to define in regions where there is no mesh present. Could you tell me why is it the case?

Regards,

SJ