000			01843aab a2200193 4500
008			240202b19901990|||mr||| |||| 00| 0 eng d
022			_a0017-9310
100			_aG.C. Quintana _9880711
245			_aThe effect of surface blocking on mass transfer from a stagnant cap drop
300			_a2631-2640 p.
520			_aNumerical results for single-drop exterior mass transport of a solute from a surfactant covered drop to the continuous phase are presented. In particular the effect of physicochemical surface blocking is determined by considering the case in which the adsorbed surfactant accumulates at the rear of the translating drop. The stagnant cap velocity profiles are used to describe convective transport. Surface blocking is incorporated through the choice of a zero flux boundary condition on those portions of the drop where surfactant is present. Finite element numerical results for the Sherwood numbers as a function of Peclet number (Pe ⩽ 104) and stagnant cap angle, φ, show that for surface coverages greater than 0.1π, the effect of surface blocking cannot be ignored. For a Peclet number equal to 104 and φ = 0.5π, the mass transfer coefficients calculated under the assumption that the presence of surfactant reduced convection in the vicinity of the drop without inhibiting the interfacial transport of solute, are found to overestimate the rate of solute mass transfer by as much as 20%.
650			_aSurface Blocking _9880712
650			_aMass Transfer _928
650			_aStagnant Cap Drop _9880713
650			_aConective Transport _9880714
773	0		_dNew York, U.S.A : Pergamon Subsidiary of Elsevier Science & Technology _x00179310 _tInternational Journal of Heat and Mass Transfer
856			_uhttps://www.sciencedirect.com/science/article/pii/0017931090901995
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c814933 _d814933