Bubble velocity profile and model of surfactant mass transfer to bubble surface

• Published in: Chemical engineering science Vol. 56; no. 23; pp. 6605 - 6616
• Main Authors: Zhang, Yongqin, McLaughlin, J.B, Finch, J.A
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.12.2001; Elsevier
• Subjects: Adsorption; Bubble velocity; Chemistry; Drops and bubbles; Exact sciences and technology; Fluid dynamics; Fundamental areas of phenomenology (including applications); Gas-liquid interface and liquid-liquid interface; General and physical chemistry; Marangoni effect; Mass transfer; Nonhomogeneous flows; Numerical simulation; Physics; Surface physical chemistry; Surfactant; Bubble velocity; Numerical simulation; Adsorption; Surfactant; Marangoni effect; Mass transfer; Gas liquid interface; Non ionic surfactant; Bubble ascent; Theoretical study; Surfactant polymer; Gas liquid adsorption; Velocity distribution; Experimental study; Ethylene oxide polymer; Navier Stokes equation; Rising velocity; Kinetics
• ISSN: 0009-2509; 1873-4405
• DOI: 10.1016/S0009-2509(01)00304-9

Single bubble velocity profiles for a 0.8 mm diameter bubble in solutions of Triton X-100 are simulated by solving the Navier–Stokes equation combined with the Marangoni effect under pseudo-steady state conditions assuming the stagnant cap model and applying different mass transfer control steps. The fit between the experimental and simulated velocity profiles indicated that the mass transfer mechanism for Triton X-100 from bulk solution to the surface of a rising bubble is boundary layer mass transfer controlled.