Numerical simulation of bubble dynamics and segregation in binary heptane/dodecane mixtures

A mathematical model for the simulation of spherical bubble dynamics in binary alkane mixtures is presented. Detailed heat and mass transfer phase transition are resolved, air absorption desorption considered. As example mixtures, high-volatile heptane low-volatile dodecane investigated. The component shows a convective counter-intuitive transport opposite to diffusion flux. staggered flux associated with local segregation mixture components surrounding liquid distinctive species distribution within bubble. comparative study pseudo-fluid where interdiffusion absent whose cannot segregate reveals that an oscillating bubble, hardly affects dynamics, while continuously growing superheated liquid, growth rate considerably affected, particularly low percentage. This demonstrates limitations treating by single-component surrogate fluid may serve as starting point development multi-component cavitation models computational applications real as, e.g. fuels or hydraulic oils.