Abstract
Abstract Three-dimensional simultaneous measurements of the position of a rising microbubble, and of the velocity field surrounding it, are performed by micro-digital holographic velocimetry. The rising position of the microbubble and the many particles surrounding the microbubble can be reconstructed by a digital hologram. This technique has successfully been applied to the 3-D dynamics of a hydrogen microbubble, in a vertical water channel, that emanates from a platinum electrode by electrolysis. The velocity of the microbubble and the flow of particles surrounding the microbubble are simultaneously obtained.
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