Rectified diffusion during nonlinear gas bubble oscillations Free

Mass transfer of the dissolved gas across a bubble wall during nonlinear spherically symmetric oscillations is studied. Use of an earlier comprehensive model [Prosperetti et al., J. Acoust. Soc. Am. 83, 502–514 (1988)] to determine the bubble dynamics avoids the need to use ad hoc polytropic assumptions. A numerical technique based on a pseudospectral method is used to determine the dissolved gas concentration in the liquid. This formulation does not require the assumptions made in the classic theory of Eller and Flynn [J. Acoust. Soc. Am. 37, 493–503 (1965)]. In some conditions results indicate a significant difference in growth rate predictions when compared to the Eller‐Flynn model. [Work supported by NSF.]