Elmer Discussion Forum

Does anyone know if the navier stokes time domain model can successfully model pressure waves (sound) in a liquid. I have a moving plate in a liquid and expect to see sound waves being produced by it. It works if i make the fluid air, but not if i make it water. I think i dont understand how to tell...

I too would find any acoustic examples really useful, especially acoustics in a liquid.

I figure you have to add the extra term to the navier-stokes equations to model compressibility of a liquid, but i dont see how this works after reading the documentation.

Im just learning Elmer and trying model a vibrating acoustic source under water. Ive got the elastic model working for the acoustic source (moving plate) but Im a bit stuck in how to couple this to a body of water. Im using the Navier stokes equations for the water body, but dont seem to get a press...