Conjugate mass transfer from a spherical moving droplet: Direct numerical simulations of enhancement by a chemical reaction

This project helps you build a model for conjugate mass transfer from a moving spherical droplet that is reacting chemically. In fluid‑fluid extraction and gas absorption processes, it is hard to predict the exact solute exchange rate because fluid flow, diffusion, and reaction kinetics are tightly linked. Classic analytical models usually simplify things by assuming very slow (creeping) flow or uniform diffusion, which ignores the effect of convection. To overcome these limits, the project walks you through creating a numerical simulation that couples fluid flow, mass transfer, and chemical reactions. Using computational fluid dynamics (CFD) tools, the simulation captures both the internal and external resistance to mass transfer, expressed with

the appropriate Sherwood numbers. It also shows how a uniform chemical reaction can boost the overall mass‑transfer rate across the droplet surface for different Peclet and Reynolds numbers. The step‑by‑step guidance shows you how to: – write the governing transport equations, – set the correct boundary conditions at the moving interface, – examine the resulting concentration fields. This computational method gives a practical way to evaluate reaction‑enhanced mass transfer in multiphase chemical reactors.

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