A CFD model for mass transfer and interfacial phenomena on single droplets

Abstract

in Wiley InterScience (www.interscience.wiley.com).Mass transfer and interfacial phenomena during simultaneous extraction of two components from a single spherical droplet to a surrounding continuous phase were investigated both experimentally and theoretically. The experiments were carried out in a single droplet measuring cell in which the mass transfer of acetone and methylisopropylketone from the disperse toluene phase to the continuous aqueous phase was investigated. The developed model takes into consideration the cross-effects of multicomponent mass transfer and the onset of Marangoni convection induced by mass transfer. The influence of Marangoni convection on the velocity field around the droplet was analyzed. The developed model was implemented into the commercial computational fluid dynamics software package CFX4.3. The results of the performed simulations agree well with experimental data. Influences of Reynolds numbers of the continuous phase and initial mass fraction on the extraction process were analyzed. Furthermore, the effect of multicomponent mass transfer on the onset of Marangoni convection was studied.

Numerical Simulation of the Solute‐Induced Marangoni Effect with the Semi‐Lagrangian Advection Scheme

“…With the help of numerical calculations, more detailed information on flow and concentration fields can be obtained to study the Marangoni effect mechanism [2,19,20]. By transforming the concentration variables using distribution coefficients, a one-fluid formulation is achieved to handle the discontinuity of concentrations and molecular diffusion coefficients [21].…”

Separation of Sulfur-Containing Compounds From Diesel by Oxidation Followed by Solvent Extraction in a Single Drop Column

“…Single drop tests can provide valuable insights regarding the hydrodynamics of the complex systems in the liquidliquid extraction. These specifications include the drop form (Al- Hassan et al, 1991;Henschke and Pfennig, 1999;Clift et al, 2005), drop oscillation (Al- Hassan et al, 1991;Brunson and Wellek, 1970) and circulation (Al-Hassan et al, 1991;Wegener et al, 2010;Slater et al, 1988), the boundary layer around the moving drops (Kumar and Hartland, 1999), the initial concentration of solute (Wegener et al, 2007;Wegener et al, 2009;Mao and Chen, 2004;Engberg et al, 2014;Paschedag and Wegener, 2006;Burghoff and Kenig, 2006), and drop velocity (Adinata and Pfennig, 2011;Torkaman et al, 2014). In liquid-liquid extraction, the selection of appropriate solvents is important.…”

Unsteady conjugate forced convection heat/mass transfer in ensembles of spherical particles with cell models

“…The unsteady conjugate mass transfer from a sphere in the presence of a chemical reaction was analysed in [43][44][45][46][47]. The influence of the Marangoni convection on the unsteady conjugate mass transfer from a drop was recently investigated in [48].…”