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Bubble nucleation and growth in fluids

Abstract : The nucleation and growth of CO2 bubbles in non-Newtonian and Newtonian fluids that were initially supersaturated under different pressures are investigated in the present work. Quantitative information by means of two cameras reveals that at an immobile nucleation site the bubble grows rapidly followed by a linear increase in bubble diameter with time. After reaching a critical size, the bubble detaches from the stagnant site to rise in liquids with an exponential temporary increase for both the diameter and distance. A simple physical reasoning was proposed to qualitatively explain these observed phenomena. Recently, the growth rate and flow fields around a CO2 micro-bubble were measured in a microdevice by a micro-Particle Image Velocimetry in water. This information at microscale gives new insight into the complex mechanism of bubble nucleation and growth in fluids and could help to develop a rigorous theoretical modelling and numerical simulation such as the Lattice Boltzmann approach.
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Submitted on : Friday, July 23, 2021 - 5:22:47 PM
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  • HAL Id : hal-00272986, version 1



X. Frank, N. Dietrich, J. Wu, B. Barraud, H.-Z. Li. Bubble nucleation and growth in fluids. Chemical Engineering Science, Elsevier, 2007, 62, pp.7090-7097. ⟨hal-00272986⟩



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