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The symmetry of Taylor bubbles moving in a vertical pipe is likely to break when the liquid flows downward at a velocity greater than some critical value. The present experiments performed in the inertial regime for Reynolds numbers in the range 100<Re <10000 show that bifurcation to an eccentric motion occurs, with a noticeable increase of the bubble velocity. The influence of the surface tension parameter (an inverse Eötvös number) has been investigated in the range [0.0045,0.067]. It appears that the motion of an asymmetric bubble is much more sensitive to surface tension than that of a symmetric bubble.  For any given surface tension parameter, the symmetry-breaking bifurcation occurs in both laminar and turbulent flow at the same vorticity to radius ratio on the axis of the carrier fluid. This conclusion also applies to results obtained previously from numerical experiments in plane flows

Taylor bubble rising in a vertical pipe against laminar or turbulent downward flow: symmetric to asymmetric shape transition