초음파장하에서 미소기포의 완화적 거동

Relaxation Behavior of a Microbubble under Ultrasonic Field

  • 강상우 (한국과학기술연구원 열유동제어연구센터) ;
  • 곽호영 (중앙대학교 기계공학부)
  • 발행 : 2000.11.02

초록

Nonlinear oscillation of a microbubble under ultrasound was investigated theoretically. The bubble radius-time curves calculated by the Rayleigh-Plesset equation with a polytropic index and by the Keller-Miksis equation with the analytical solution for the Navier-Stokes equations of the gases were compared with the observed results by the light scattering method. This study has revealed that the bubble behavior such as the expansion ratio and the bouncing motion after the first collapse under ultrasound depends crucially on the retarded time of the bubble motion to the applied ultrasound.

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