Boundary Type for Acoustic Simulation in GAMBIT?

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For simulating the flow inside a tube with one closed end and a speaker-driven open end in GAMBIT, selecting the appropriate boundary type for the speaker end is crucial. The speaker generates oscillating pressure and velocity, influencing the acoustic field within the tube. Users recommend using a "pressure outlet" boundary condition for the speaker end to accurately represent the oscillating behavior. The other boundaries can remain as "wall" types to reflect the closed end and tube walls. Proper boundary selection is essential for achieving realistic acoustic simulations.
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Hi everyone,

I would like to simulate the flow inside a tube having one closed end and the other end is driven by a loud speaker.

The speaker creates an oscillating pressure (and velocity) which will have an effect on the acoustic field inside the tube.

so to be clear: which boundary type shall I choose in GAMBIT for the speaker end. (the other boundaries are "wall" type).

Thank you in advance for your help
 
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