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CFD simulation of bubble in flow field: Investigation of dynamic interfacial behaviour in presence of surfactant molecules
, Article Colloids and Interface Science Communications ; Volume 27 , 2018 , Pages 1-10 ; 22150382 (ISSN) ; Fayzi, P ; Lotfi, M ; Arzideh, S. M ; Sharif University of Technology
Elsevier B.V
2018
Abstract
This work presents the results of numerical simulation of liquid flow on a static bubble. Velocity and surfactant concentration profiles of the liquid around a bubble exposed in flow field were estimated via unsteady CFD solution. Governing equations are the Navier-Stokes and conservation of mass in the liquid bulk and at the interface. Resulted profiles of surfactant concentration and velocity in the liquid bulk are used to determine the dynamic surface tension data via two adsorption isotherms of Langmuir and Frumkin. Data of dynamic surface tension were validated via experimental data of “bubble in flow field” protocol. Surface concentrations of surfactants were also numerically...