Computing Mass Transfer at Deformable Bubbles for High Schmidt Numbers

The occurrence of extremely thin liquid‐sided concentration boundary layers at bubble or droplet interfaces for realistic, i.e., high Schmidt numbers is a severe obstacle for the numerical simulation of mass transfer processes in gas‐liquid systems. This contribution provides a survey of different approaches to overcome this problem, with the main emphasis put on the approach introduced and further developed by the authors. This approach employs a nonlinear flux computation and is based on the modeling of subgrid‐scale concentration profiles. Based on the latest developments, recommendations for future research are also provided.