Transient Mass Transfer in Steady-State Translational and Shear Flows

Transient Mass Transfer in Steady-State Translational and Shear Flows 

We consider a laminar steady-state flow past a solid spherical particle (drop or bubble) of radius a and study transient mass transfer to the particle surface. At the initial time t = 0, the concentration in the continuous phase is constant and equal to C, whereas for t 0 a constant concentration Cs is maintained on the particle surface. 

In the particle-centered spherical coordinate system (R, 6, p), the nonsta-tionary problem for the concentration C in dimensionless variables comprises the convective diffusion equation 

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