Modeling Transient Churn-annular Flows in a Long Vertical Pipe

Alves, M.V.C., Barbosa, J.R., Waltrich, P.J. and Falcone, G. (2014) Modeling Transient Churn-annular Flows in a Long Vertical Pipe. Proceedings of the ASME international mechanical engineering congress and exposition, 8C, V08CT09A02.

Abstract

A mathematical model is presented to describe the behavior of transient gas-liquid flows involving the churn and annular flow patterns in a long vertical tube. The HyTAF (Hyperbolic Transient Annular Flow) code, developed specifically for this study, is based on the one-dimensional multi-fluid formulation and takes account of hydrodynamic non-equilibrium flow conditions by means of relationships for the rates of droplet entrainment and deposition. A finite difference algorithm is employed to solve the hyperbolic system of mass, momentum and energy equations via the Split Coefficient Matrix Method. The modeling results are compared with experimental data for steady-state annular and churn flows obtained from the literature and with pressure and flow rate induced transient churn-annular flow data generated in a large scale facility (48-nun ID, 42-m long test section).

• Item Type: Articles
• Additional Information: ASME International Mechanical Engineering Congress and Exposition (IMECE2013). San Diego, CA. Nov 15-21, 2013.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Falcone, Professor Gioia
• Authors: Alves, M.V.C., Barbosa, J.R., Waltrich, P.J., and Falcone, G.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Proceedings of the ASME international mechanical engineering congress and exposition
• Publisher: American Society of Mechanical Engineers