Effect of Wall Proximity and Surface Tension on a Single Bubble Rising near a Vertical Wall

Path instability of a rising bubble is complex phenomenon. In many industrial applications, bubbles encounter walls, and the interactions between wall have significant impact on flow physics. A single near vertical was experimentally observed to follow bouncing trajectory. To investigate near-wall dynamics bubbles, 3D numerical simulations were performed based volume fluid (VOF) method using open source solver OpenFOAM. The effect proximity surface tension trajectory investigated. Previous studies focused for higher Eotvos numbers (Eo) varied Galilei number (Ga). physical properties chosen such that free-rising lies in rectilinear regime. Ga fixed Eo analyze its bubble’s It found presence increases drag experienced by induces an early transition from planar zigzagging We identify maximum distance critical amplitude, frequency wavelength motion are independent initial distance, but they decrease with decreasing tension.