Behavior of Flow around Obstacle in Vertical Gas-Liquid, Bubbly Two-Phase Flow. Effects of Geometry and Aspect Ratio of Obstacle.

Numerical Simulation for Gas-Liquid Two-Phase Free Turbulent Flow Based on Vortex in Cell Method

“…11. The ∆p value reduces with increasing α g0 at α g0 ≤ 0.03, being in agreement with the experiment (6) . The reduction may be attributable to the decrement in the mean density for the Fig.…”

“…7. These changes in C p caused by the increment in α g0 are favorably compared with the measurement (6) , though the depiction is omitted.…”

“…The diameter is set at the measured value 2.5 mm, and the velocity u g0 is estimated from the drift flux model (26) . The corresponding experiments (5), (6) reported that dispersed bubbles are observed to flow in the region upstream of the cylinder. To reproduce such bubbly flow condition, the bubble releasing positions are determined by using random numbers.…”

“…The flow was experimentally investigated by Shakouchi et al (5), (6) . The square-section cylinder, of which side length s is 30 mm, is mounted in a channel with 90 mm × 45 mm cross-sectional area.…”

“…For the fundamental flows, such as plane mixing layers (1), (2) , jet (3) and wake flows behind an obtuse body (4) - (6) , the turbulence modulation of the liquid-phase due to the bubble and the relation between the large-scale vortical structure and the bubble motion have been experimentally investigated. Some numerical analyses have also been carried out.…”