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21.3.3 Specifying Acoustic Receivers

In the Acoustics Model panel, click the Define Receivers... button to open the Acoustic Receivers panel (Figure  21.3.5).

Figure 21.3.5: The Acoustic Receivers Panel
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Note that you can also open the Acoustic Receivers panel by clicking the Receivers... button in the Acoustic Sources or the Acoustic Signals panels.

Increase the No. of Receivers to the total number of receivers for which you want to compute sound, and enter the coordinates for each receiver in the X-Coord., Y-Coord., and Z-Coord. fields. Note that because FLUENT's acoustics model is ideally suited for far-field noise prediction, the receiver locations you define should be at a reasonable distance from the sources of sound (i.e., the selected source surfaces). The receiver locations can also fall outside of the computational domain.

For each receiver, you can specify a file name in the Signal File Name field. These files will be used to store the sound pressure signals at the corresponding receivers. By default, the files will be named receiver-1.ard, receiver-2.ard, etc.

Once the receiver locations have been defined, the setup for your acoustic calculation is complete. You can now proceed to instruct FLUENT to perform a transient calculation for a suitable number of time steps. When the calculation is finished, you will have either the source data saved on files (if you chose to save it to a file or files), or the sound pressure signals (if you chose to perform an acoustic calculation "on the fly''), or both (if you chose to save the source data to files and if you chose to perform the acoustic calculation "on the fly'').

If you chose to save the source data to files, the FLUENT console window will print a message at the end of each time step indicating that source data have been written (or appended to) a file (e.g., acoustic_example240.asd).


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