What is the reason of Absorbtion Coefficient too small or zero on Impedance Tube Simulation?
I am trying to simulate Impedance Tube and obtain absorption coefficient.
I have three body including 2 acoustic body(air) and 1 structural (absorber).
I define surface velocity as 0.01 mm/s on port and it is also radiation boundary.
I define rigid wall on the other side of tube.
I define fluid solid interface automatically.
I define displacement 0 on both direction for absorber.
I check a lot of article and tutorial but I can not understand what is my mistake.
I need someone guidance. Please help. Thank you.