Modeling transient churn-annular flows in a long vertical pipe
Document Type
Conference Proceeding
Publication Date
1-1-2013
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-mm ID, 42-m long test section). Copyright © 2013 by ASME.
Publication Source (Journal or Book title)
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Recommended Citation
Alves, M., Barbosa, J., Waltrich, P., & Falcone, G. (2013). Modeling transient churn-annular flows in a long vertical pipe. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 8 C https://doi.org/10.1115/IMECE2013-64534