The behavior and hydrodynamical performance of a single bubble rising through mercury with and without magnetic field has been studied experimentally. A new method to measure the rise velocity and the shape of bubble with an electrical triple probe is proposed. When there is no magnetic field, a bubble changes its shape from spherical to elliptic and then to a spherical cap shape, as its equivalent radius Rm changes from 0.1 to 3 mm. The experimental results are found to agree well with the theories reported so far. In the case of a magnetic field, it is found that the effect of intensity of magnetic field B on the rise velocity depends largely on the radius of a bubble. When Rm = 3 mm, the rise velocity decreases monotonically with the increase of B. However, when Rm = 1 mm, the rise velocity increases once but it then starts to decrease afterwards with the increase of B.

This content is only available via PDF.
You do not currently have access to this content.