On bubble stability in a standing sound field
نویسندگان
چکیده
The equation is solved numerically for the constants: liquid density ρ = 0.998 kg/m, surface tension σ = 0.07275 N/m, viscosity μ = 0.001 Pa·s, vapor pressure (water) pv = 2.330 kPa, static pressure pstat = 100 kPa to 20 000 kPa, polytropic exponent γ = 1.67, sound velocity in the liquid C0 = 1482 m/s. The variables in the equation are the radius of the bubble R and time t, an overdot means the derivative with respect to time t, thus Ṙ is the bubble wall velocity and R̈ is the bubble wall acceleration. Rn is the bubble radius at rest. The driving sound field pac(t) is assumed to be sinusoidal with pressure amplitude pa and circular frequency ω = 2πνa, νa being the driving frequency.
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