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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Coupled Field Transient – Acoustic › Reply To: Coupled Field Transient – Acoustic

March 21, 2024 at 8:30 am
mattis.dahleriksson
Subscriber

Hello,

Thank you for your reply. Yes, that was the post that i referred to. I have tried to replicate that simulation but i cannot reproduce the results. Can you provide some information regarding that particular model?

I have made a 10 m long water "duct" with 0.2x0.2 m2 cross section area using Fluid220 elements, a pressure pulse is applied on one end, a radiation boundary is applied at the other end. I am comparing the regular Water liquid material with 1.003e-09 MPa*s visc to an adjusted Water liquid with 0.001 MPa*s visc, but the acoustic pressure at the radation boundary is the same. 

My specific case involves a much slower pulses at 10-20 Hz, at a wave speed of 300 m/s. I want to benchmark my calculation against an analytical simulation that we have, the analytical simulation uses a specified damping ratio and i think this visc parameter could be a good parameter to work with.

BR