Effects of Vertical Serpentine Pipe on Liquid Film Characteristics

الملخص

This study investigates the dynamics of liquid film thickness in both downward and upward-flow pipes, influenced by various superficial air and water velocities. Data collected from sensors reveals distinct flow characteristics. High airflow combined with low water flow rates results in large disturbance waves at upper and mid-level probes, while smaller wavelengths and lower amplitudes are observed under different conditions. The stabilisation of the liquid film in the middle and lower regions is attributed to reduced bending effects. Unique frequency patterns emerge near bends, showing significant differences in power spectral density (PSD) compared to more distant locations. Furthermore, the examination of probability density function (PDF) data highlights the substantial influence of air and water superficial velocities on flow dynamics, with variations observed across all tested velocity ranges. These findings illustrate the complex interplay of flow parameters and liquid film behaviour in multiphase systems