Abstract
Experiments were performed to investigate splitting bubbles formed by liquid flow through a Raschig ring packed bed. A liquid was discharged vertically upwards through a packed bed into a large volume of the same liquid. Shear layers were thus formed both in the packed bed and around the jet. A bubble rising through the packed bed and the jet splits in each layer. The measured bubble size distribution can be well represented by an upper limit log-normal probability function with two constant parameters and only one variable, the maximum stable bubble diameter. In this operation, micro-bubble, the diameter of which is less than 1 mm, was confirmed with increasing liquid velocity through a packed bed. Furthermore, we need mean bubble diameter to give the distribution of splitting bubbles the full picture. Therefore, a correlation equation for volumetric mean bubble diameter of splitting bubbles is presented.
