Numerical investigation of wavy-annular airwater two-pase flow in a small horizontal pipe

<p>This study has been carried out using Computational Fluid Dynamics (CFD) to investigate the annulartwo phase flow behavior that flow pattern has some desirable features for renewable energy systemapplication. The circumferential distribution of the liquid film in a small diameter horizontal pipe (ID =8.8mm) is non-uniform owing to gravitational force, where liquid film is thicker at the bottom than that atthe top. In a wavy-annular flow regime, large amplitude waves formed at the gas-liquid interface hasplayed a significant role to replenish the top liquid film.</p>