Bikerman column

This method is useful for the continuous monitoring of drainage rates and the stabilities of foams. The technique is similar to the Bikerman column test, although in this case pairs of silver-or platinum-plated electrodes are situated at different heights in the column. The electrodes are connected to an analog digital converter... 

Figure 13.16 Effect of particle size on foaming ability in an electrolyte solution of CaC/2- Large, electrolyte-induced hydrophobic quartz particles can cause destabilization of froths, whereas small particles cam stabilize them. In the figure, "large" particles have an average size of 227 pm and "small" particles an average size of 6 pm Ah refers to foam height in a Bikerman column. Adapted from Hansen et al (2008), with permission from Elsevier...

Bikerman has reviewed various data involving static columns of foam. When gas was bubbled through a surfactant solution, toe height of the static column of foam generated was shown to be directly proportional to toe gas flow rate. This effect on static foam can be related to flowing foam since toe behavior of toe latter is affected by bubble texture and size. 

The lifetime of bubbles in a foam column can be defined as a significant physical parameter. Bikerman proposed the ratio of steady-state foam volume to gas flow rate as a unit of foaminess, denoted X- A glass frit is used to generate the bubbles in a jacketed glass column [20]. The steady state of... 

Bikerman test with a cylindrical column (Sparge tube technique)... 

Komarov et al. [61] have also studied the effect of acoustic pressure on the residence time of gas in foam generated by nitrogen sparging a bubble column containing highly viscous glycerin-water solutions (of viscosity >100 mPa s). The residence time of gas in the foam in a bubble column is of course the foaminess, Ebik of Bikerman [62]. It is measmed in the case where continuous injection of gas results in the formation of a foam of a steady height at which the rate of bubble rupture... 

---