A simplified model for churn and annular flow regimes in small- and large-diameter pipes

2017 ◽  
Vol 162 ◽  
pp. 309-321 ◽  
Author(s):  
E. Pagan ◽  
W.C. Williams ◽  
S. Kam ◽  
P.J. Waltrich
Keyword(s):  
Annular Flow ◽  
Large Diameter ◽  
Flow Regimes ◽  
Simplified Model ◽  
Large Diameter Pipes

Shifting Chemical Equilibria in Flow-Efficient Decarbonylation Driven by Annular Flow Regimes

2014 ◽  
Vol 126 (43) ◽  
pp. 11741-11745 ◽  
Author(s):  
Bernhard Gutmann ◽  
Petteri Elsner ◽  
Toma Glasnov ◽  
Dominique M. Roberge ◽  
C. Oliver Kappe
Keyword(s):  
Annular Flow ◽  
Flow Regimes ◽  
Chemical Equilibria

Load-carrying ability of large-diameter pipes

1978 ◽  
Vol 10 (1) ◽  
pp. 29-34 ◽  
Author(s):  
V. V. Chelyshev ◽  
V. G. Burdukovskii ◽  
B. N. Gubashov ◽  
V. V. Kirichenko
Keyword(s):  
Large Diameter ◽  
Load Carrying ◽  
Large Diameter Pipes

Factory-applied anticorrosive insulation for large-diameter pipes

Metallurgist ◽  
1987 ◽  
Vol 31 (10) ◽  
pp. 320-321
Author(s):  
V. M. Ryabov ◽  
L. A. Usova
Keyword(s):  
Large Diameter ◽  
Large Diameter Pipes

Numerical Simulation of Droplet Size Distribution in Vertical Upward Annular Flow

2010 ◽  
Vol 132 (12) ◽  
Author(s):  
Y. Liu ◽  
W. Z. Li
Keyword(s):  
Size Distribution ◽  
Droplet Size ◽  
Annular Flow ◽  
Liquid Droplet ◽  
Large Diameter ◽  
Droplet Size Distribution ◽  
Population Balance ◽  
Balance Model ◽  
Diameter Distribution ◽  
Two Fluid

The liquid droplet size distribution in gas-liquid vertical upward annular flow is investigated through a CFD (computational fluid dynamics)-PBM (population balance model) coupled model in this paper. Two-fluid Eulerian scheme is employed as the framework of this model and a population balance equation is used to obtain the dispersed liquid droplet diameter distribution, where three different coalescence and breakup kernels are investigated. The Sauter mean diameter d32 is used as a bridge between a two-fluid model and a PBM. The simulation results suggest that the original Luo–Luo kernel and the mixed kernel A (Luo’s coalescence kernel incorporated with Prince and Blanch’s breakup kernel) can only give reasonable predictions for large diameter droplets. Mixed kernel B (Saffman and Turner’s coalescence kernel incorporated with Lehr’s breakup kernel) can accurately capture the particle size distribution (PSD) of liquid droplets covering all droplet sizes, and is appropriate for the description of liquid droplet size distribution in gas-liquid annular flow.

Numerical Simulation of UOE Pipe Process and its Effect on Pipe Mechanical Behavior in Deep-Water Applications

2015 ◽  
Author(s):  
Giannoula Chatzopoulou ◽  
Spyros A. Karamanos ◽  
George E. Varelis
Keyword(s):  
Deep Water ◽  
Manufacturing Process ◽  
Large Diameter ◽  
Structural Response ◽  
Structural Instability ◽  
External Pressure ◽  
Line Pipe ◽  
Simulation Tools ◽  
Large Diameter Pipes ◽  
Pipe Manufacturing

Large-diameter thick-walled steel pipes during their installation in deep-water are subjected to a combination of loading in terms of external pressure, bending and axial tension, which may trigger structural instability due to excessive pipe ovalization with catastrophic effects. In the present study, the UOE pipe manufacturing process, commonly adopted for producing large-diameter pipes of significant thickness, is considered. The study examines the effect of UOE line pipe manufacturing process on the structural response and resistance of offshore pipes during the installation process using nonlinear finite element simulation tools.

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