Experimental Investigation of Two-Phase Flow Patterns in a Vertical to Horizontal Bend Pipe Using Wire-Mesh Sensor

The air-water two-phase flow plays an important role in many applications of industry fields. Usually, a 90-degree bend is used to connect pipes for changing the direction which influences pattern. In this paper, effect under different ranges gas and liquid superficial velocities on patterns horizontal pipe located after was experimentally investigated, then results were presented compared pattern map. Also, tomographic images probability density functions capture cross-section void fraction its distribution patterns. revealed that at low rates, stratified-wavy observed as dominant While wavy-annular semiannular high range rates pipe. also showed rate, bubbly, plug, slug, stratified-wavy, when increased. gave good agreement with experimental observations results.