{"id":163336,"date":"2021-10-24T20:34:14","date_gmt":"2021-10-24T20:34:14","guid":{"rendered":"\/forum\/forums\/topic\/what-is-the-reason-of-absorbtion-coefficient-too-small-or-zero-on-impedance-tube-simulation\/"},"modified":"2021-11-25T09:30:03","modified_gmt":"2021-11-25T09:30:03","slug":"what-is-the-reason-of-absorbtion-coefficient-too-small-or-zero-on-impedance-tube-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-the-reason-of-absorbtion-coefficient-too-small-or-zero-on-impedance-tube-simulation\/","title":{"rendered":"What is the reason of Absorbtion Coefficient too small or zero on Impedance Tube Simulation?"},"content":{"rendered":"
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Hello,<\/p>\n

I am trying to simulate Impedance Tube and obtain absorption coefficient. <\/p>\n

I have three body including 2 acoustic body(air) and 1 structural (absorber). <\/p>\n

I define surface velocity as 0.01 mm\/s on port and it is also radiation boundary.<\/p>\n

I define rigid wall on the other side of tube. <\/p>\n

I define fluid solid interface automatically.<\/p>\n

I define displacement 0 on both direction for absorber.<\/p>\n

I check a lot of article and tutorial but I can not understand what is my mistake. <\/p>\n

I need someone guidance. Please help. Thank you. <\/p>\n

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