Numerical study of mean flow effect on sound propagation through an aerosol


172nd Meeting of the Acoustical Society of America, Hawaii, United States Of America, 28 November - 02 December 2016, vol.29 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 29
  • Doi Number: 10.1121/2.0000483
  • City: Hawaii
  • Country: United States Of America


© 2017 Acoustical Society of America.Previous studies on the sound attenuation and dispersion in an aerosol consisting of air and water droplets have been extended to accommodate mean flow effects. A numerical methodology based on solution of one dimensional, linearized Euler equations in the frequency domain has been developed. The interactions between the fluid and particle phases have been considered to be through momentum and heat exchange. In order to compare the numerical results, a theoretical solution which is valid for stationary medium has been extended to include flow effects. The attenuation and dispersion results are presented for different flow conditions and aerosol concentration levels. Both theoretical and numerical methods have proven the correctness of each other by yielding the same results. Accordingly, mean flow parameters (amplitude and direction) seem to have varying affects with respect to frequency both on attenuation and dispersion values. In addition, the level of aerosol concentration changes these outputs significantly, especially when it is at finite values.