Abstract
The shape and rising velocity, pressure variation of a bubble and pressure spectrum from the pressure variation due to the rise of a bubble in water have been studied for bubble volumes from 1 × 10–6 to 5 × 10–5 m3.
The vertical bubble length and radius of curvature are found to be 0.393 and 1.21 times the equivalent bubble diameter, respectively.
The mean frequency of the pressure spectrum decreases with increase in bubble size. The dynamic minimum pressure is related to the radius of curvature and the maximum pressure to the vertical bubble length. The pressure spectrum is correlated with the bubble properties.
The energy dissipation rate was determined from the pressure spectrum and was found to increase with increase in the bubble radius of curvature.
