Experiments and numerical simulations were performed to study the onset of finger convection in a stratified fluid layer caused by thermal and solutal capillary motion. Experiments were performed in a stratified ethanol-water solution contained in a shallow tank. Capillary motion was generated by a 2°C temperature difference maintained between the sidewalls. It caused the onset of finger convection by bringing relatively warm and solute-rich fluid on top of relatively cooler solute-poor fluid. A two-dimensional numerical simulation at early times prior to the onset of finger convection was carried out. The results clearly show the interactive effects of thermal and solutal capillary motion.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes