The formation of gas bubbles and their subsequent rise due to buoyancy are very important fundamental phenomena that contribute significantly to the hydrodynamics in gas−liquid reactors. The rise o...

Bubble Formation and Bubble Rise Velocity in Gas−Liquid Systems: A Review

Sea salt aerosol (SSA) exerts a major influence over a broad reach of geophysics. It is important to the physics and chemistry of the marine atmosphere and to marine geochemistry and biogeochemistry generally. It affects visibility, remote sensing, atmospheric chemistry, and air quality. Sea salt aerosol particles interact with other atmospheric gaseous and aerosol constituents by acting as sinks for condensable gases and suppressing new particle formation, thus influencing the size distribution of these other aerosols and more broadly influencing the geochemical cycles of substances with which they interact. As the key aerosol constituent over much of Earth's surface at present, and all the more so in pre-industrial times, SSA is central to description of Earth's aerosol burden.

Sea Salt Aerosol Production: Mechanisms, Methods, Measurements, and Models - A Critical Review

The bubble mechanism for methane transport from the shallow sea bed to the surface: A review and sensitivity study

https://ris.utwente.nl/ws/files/6408930/Kreulen93microporous.pdf

Microporous hollow fibre membrane modules as gas-liquid contactors. Part 1: Physical mass transfer processes. A specific application: mass transfer in highly viscous liquids

GAS bubbles rising by gravity in non-newtonian elastic liquids1–4 are different to gas bubbles in viscous newtonian fluids in at least two ways. First, the bubbles in the non-newtonian liquids often have a peculiar tip at the rear pole, and second, the terminal rise velocity versus volume curve often has a discontinuity at a certain ‘critical’ volume. To investigate this unusual flow situation further we have used laser–Doppler anemometry5 to measure the liquid velocity in the wake behind air bubbles in a non-newtonian liquid. The measurements described here reveal the unexpected result that the liquid velocity behind the bubbles is in the downwards direction away from the rising bubbles (the velocities are referred to an observer at rest with respect to the liquid far from the bubbles). Thus the liquid velocity is opposite to the velocity in the usual wake behind objects moving in viscous newtonian fluids and we have called the phenomenon ‘negative wake’.

D.S.L. Johnson

Papers

Mechanics and mass transfer of single bubbles in free rise through some Newtonian and non-Newtonian liquids