Propagation of a negative streamer over a bubble floating on a water surface

The main goal of this work is to clarify in detail the interaction of negative corona and negative streamers with a bubble floating on a water surface. The corona and streamers were initiated with the metallic pin stressed by a step-wise high voltage of a negative polarity. It was shown that at low applied voltage and short distance between pin and bubble a negative corona foregoes an appearance of the streamers. This corona produces the ionic wind which directed towards the top of a bubble and influences both the geometry of a bubble and its life-time. In the case of high amplitude of the applied voltage and long distance between tip and bubble the negative streamer sliding on the bubble surface happens. A difference in the interaction of positive and negative streamers with a water bubble is discussed.