Slug flow is a highly complex type of flow with an unsteady nature. The prediction of pressure drop, heat, and mass transfer for such flow is often considered a difficult task. The chapter deals with steady slug flow. The chapter introduces several options of modeling the hydrodynamic ...
slug frequency, bubble and slug lengths in ducts with inclination angles from −4° down to −13° on experimental grounds. The analyses were performed at different gas-liquid volumetric flow rates for which the slug flow regime was observed. An existing experimental rig in the NUEM/UTFPR ...
Two-phase flowslug flowflow structureinteraction between bubblesModelling of the slug structure requires a new effort on fundamental research. To clarify some aspects of the horizontal slug flow, an experimental study of the behaviour of two isolated bubbles in a single-phase liquid flow was ...
Two-phase slug flow in inclined pipelines can cause significant practical operating problems. When slugs flow in an inclined pipeline that contains sections of different inclinations, they undergo a change of length and slug flow characteristics as the slug moves from section to section. In addition...
(Collier,1994) 2.1 流型介绍 2.1.2绝热条件下水平管中气液两相流流型 2 3 分层流 分层波状流 5 4 塞状流 弹状流 1 6 分散泡状流 环状流 间歇流(Intermittent flow) 7 ——4 塞状流(plug flow ) ——5 弹状流(slug flow ) 雾状流 水平管中两相流型与垂直管中同向上升流型相似; 水平管中流型...
Slug flow: This is similar to plug flow, with alternate large bullet-shaped gas bubbles moving along the upper part of the tube. This can cause severe vibrations in the tube. 11. Annular flow: The liquid flows as a thin film along the tube wall and the gas flows in the core, while ...
Flow regime, void fraction, rising velocity of slug bubble and frictional pressure loss were measured for an air-water two-phase flow in a small diameter tube of 4 mm inside diameter. A good agreement was obtained between the transition boundaries of observed flow regimes and the predictions by...
(Plug flow) ( ) U G U L 2.1 2.1.2 2b (Collier,1994) 水平管中两相流型与垂直管中同向上升流型相似; 水平管中流型多数不对称(重力对各相密度影响)。 分层流 分层波状流 间歇流(Intermittent flow) ——4 塞状流(plug flow) ——5 弹状流(slug flow) 塞状流 弹状流 环状流 分散泡状流...
The paper presents a construction of a simplified model approximating the actual observed flow pattern. The resulting expressions for frictional pressure drop are found to agree fairly well with the author's data for steam and water and the data for air and water of other investigators. The simil...
shear stress are studied for a stationary slug bubble with downward liquid flow. Moreover, the relationship between the plug and foam flow shape profiles, relative velocity, void fraction and gas slug velocity at an elevated pressure of 0.2MPa studied bySekoguchi et al. (1996)are also analyzed...