Based on bubbly two-phase flow an equation for the speed of sound in the ECM frontal gap is derived, and it is seen that the sonic speed is well within reach of the electrolyte velocities usually encountered in ECM. Thus the Mach number can become equal to one, which represents a choking condition. The practical significance of the choking phenomenon and other compressibility effects are discussed, and experimental data are presented. An explanation for the flow lines or striations frequently observed with radial outflow configurations is also given.

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