2018/09/12 by Rashmi Ramadugu, Vikash Pandey, Ramadugu, Rashmi +3
Engineering · Environmental Science · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Mixing #Minerals Flotation and Separation Techniques
paper · pdf · doi:10.48550/arxiv.1809.04759
openalex publication_date 2018/09/12 · openalex created_date 2022/08/03 · openalex updated_date 2026/08/04
We present a direct numerical simulation (DNS) study of buoyancy driven\nbubbly flows in two-dimensions. We employ volume of fluid (VOF) method to track\nthe bubble interface. To investigate spectral properties of the flow, we derive\nthe scale-by-scale energy budget equation. We show that the Galilei number (Ga)\ncontrols different scaling regimes in the energy spectrum. For high Galilei\nnumbers, we find the presence of an inverse energy cascade. Our study indicates\nthat the density ratio of the bubble with the ambient fluid or the presence of\ncoalescence between the bubbles does not alter the scaling behaviour.\n