*4.2. Fluid Velocity Profile*

The fluid and gas velocities are examined in Figures 6–19. The effect of the model coefficient on the flow velocity was increased when we increased the value of the model coefficient, as seen in Figure 6. It is clear from Figure 7 that with increasing values of the lift coefficient, there was an upturn in the velocity of fluid. From Figure 8, it is found that the behavior of the velocity reduced with the increasing values of the Eotvos number because the Eotvos number is the ratio of gravitation force to surface tension. The larger values of *Eo* represented lesser surface tension and an increase in gravity resulted in the reduction of velocity. In Figure 9, we observed that when we increased the values of volume, the velocity reduced. Due to the rise in bubble volume, drag force increased and, hence, fluid slowed down. The fluid velocity decreased by increasing the value of the added mass coefficient as depicted in Figure 10. The added mass force increased with the rise in bubble volume because it was a drag force due to accelerating bubbles, hence the velocity of the fluid reduced. It is clear from Figure 11 that with rising values of Rbe the velocity of the fluid was decreased. Rbe was a parameter related to bubble volume directly, with a constant fluid density it behaved similar to *Vb*. From Figure 12, it was detected that the behavior of velocity reduced with increasing values of the slip velocity.
