What are the main flow patterns in horizontal two-phase gas-liquid flow?

Main patterns include: Stratified flow (low velocities - liquid at bottom, gas above), Wavy stratified (higher gas velocity creates waves), Slug flow (liquid slugs alternate with gas pockets - problematic for equipment), Plug flow (elongated gas bubbles in liquid), Annular flow (high gas velocity - liquid film on wall, gas core with droplets), and Dispersed bubble flow (high liquid velocity - gas bubbles dispersed in liquid). Pattern maps (Baker, Taitel-Dukler) predict pattern based on superficial velocities and fluid properties.