Monte Carlo simulation of aerosol transport in rising gas bubbles undergoing shape deformation

Development and application of a novel swirl cyclone scrubber

“…In a pool scrubbing experiment using a porous plug, Anagbo and Brimacombe [25] reported bubble diameter between 0.4 and 3 cm depending upon the degree of coalescence among the bubbles. Akbar and Ghiaasiaan [26] conducted a numerical simulation study on removal of aerosol particles in a pool scrubbing system using a hybrid Eulerian-Monte Carlo method. In their simulations, the bubble diameters between 0.3 and 0.5 cm were used, which represented the experiments of Herranz et al [27].…”

The dependence of pool scrubbing decontamination factor on particle number density: modeling based on bubble mass and energy balances

“…The influence of bubble secondary motion has been studied numerically by Akbar and Ghiaasiaan [29] for a single bubble with d b = 3 ×10 −3 and 5 ×10 −3 m presetting an ellipsoidal shape with oscillation and instable zigzag path. The DF for such a wobbling bubble is calculated to be a factor of five or so greater than that for a spherical bubble with similar size but without secondary motion.…”

Enhanced Effect of Bubble Deformation on Internal Particle Transport

“…(2) Particles that collide with the interface are considered to be scrubbed by the water film. For this purpose, particles would be automatically deleted from the computational domain as they reach the region with liquid fraction α l of 0.5 (the part of the computational domain with void fractions higher than 0.5 is considered to be the bubble 27 ). Therefore, the liquid−particle interaction and interfacial forces acting on the particles through the liquid film are ignored in this work but are under further study to couple with the internal transport process.…”

“…With the development of computing technology, researchers began to employ numerical methods to comprehensively analyze the coupled process of bubble motion and particle collection. ,,− Plenty of numerical work was conducted on the motion of particles in the bubble via Eulerian and Lagrange methods, in which the inertia, Brownian diffusion, and other mechanisms were taken into account. ,− To simplify the complexity, most of the studies assumed that the bubble remains spherical and rises steadily. The internal flow field was estimated using the Hadamard–Rybczynski solution and represented by Hill’s vortex flow.…”

“…The bubble external flow and internal circulation were determined by solving full Navier–Stokes Equations. Akbar and Ghiaasiaan investigated the transport of particles suspended in a bubble rising in a stagnant pool based on a hybrid Eulerian–Monte Carlo method. The bubble hydrodynamics were treated in the Eulerian frame with a VOF technique, and equations of motion of particles were numerically solved in the Lagrange frame.…”