Author(s): Chaebin Song; Joo Suk Ko; Su Hyeok Choi; Siwan Lyu
Linked Author(s): Joo Suk Ko
Keywords: PTV velocity distribution air-water two phase flow volumetric flux ratio
Abstract: In order to investigate the behavior of air-water two phase flow in a horizontal pipe, laboratory experiments were performed. PTV technique was applied to analyze the velocity structure and flow characteristics according to the air-water volumetric flux ratio. It has been shown that the size and distribution of bubbles in the flow vary with the air-water flux ratio, resulting in vertically asymmetrical velocity distribution and flow pattern about centerline of pipe. This distribution is due to the accumulation of bubbles near the upper surface of the pipe as a result of buoyancy, suggesting that the flow behaviour in the horizontal pipe is dominated by air-water interactions rather than single-phase flow dynamics. The experimental results under various hydraulic conditions can offer as the basic approach for analyzing two-phase flow in pipes and enhancing hydraulic performance.
Year: 2025