The impact force on an elbow induced by traveling isolated liquid slugs in a horizontal pipeline is studied. A literature review reveals that the force on the elbow is mainly due to momentum transfer in changing the fluid flow direction around the elbow. Therefore, to accurately calculate the magnitude and duration of the impact force, the slug arrival velocity at the elbow needs to be well predicted. The hydrodynamic behavior of the slug passing through the elbow needs to be properly modeled too. A combination of 1D and 2D models is used in this paper to analyze this problem. The 1D model is used to predict the slug motion in the horizontal pipeline. With the obtained slug arrival velocity, slug length, and driving air pressure as initial conditions, the 2D Euler equations are solved by the smoothed particle hydrodynamics (SPH) method to analyze the slug dynamics at the elbow. The 2D SPH solution matches experimental data and clearly demonstrates the occurrence of flow separation at the elbow, which is a typical effect of high Reynolds flows. Using the obtained flow contraction coefficient, an improved 1D model with nonlinear elbow resistance is proposed and solved by SPH. The 1D SPH results show the best fit with experimental data obtained so far.
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June 2014
Research-Article
Dynamic Force on an Elbow Caused by a Traveling Liquid Slug
Darcy Q. Hou,
Darcy Q. Hou
State Key Laboratory of Hydraulic
Engineering Simulation and Safety, and
School of Computer Science and Technology,
e-mail: darcy.hou@gmail.com
Engineering Simulation and Safety, and
School of Computer Science and Technology,
Tianjin University
,Tianjin 300072
, China
e-mail: darcy.hou@gmail.com
Search for other works by this author on:
Arris S. Tijsseling,
Arris S. Tijsseling
Department of Mathematics
and Computer Science,
e-mail: a.s.tijsseling@tue.nl
and Computer Science,
Eindhoven University of Technology
,Eindhoven 5600MB
, The Netherlands
e-mail: a.s.tijsseling@tue.nl
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Zafer Bozkus
Zafer Bozkus
Hydromechanics Laboratory,
Department of Civil Engineering,
e-mail: bozkus@metu.edu.tr
Department of Civil Engineering,
Middle East Technical University
,Ankara 06800
, Turkey
e-mail: bozkus@metu.edu.tr
Search for other works by this author on:
Darcy Q. Hou
State Key Laboratory of Hydraulic
Engineering Simulation and Safety, and
School of Computer Science and Technology,
e-mail: darcy.hou@gmail.com
Engineering Simulation and Safety, and
School of Computer Science and Technology,
Tianjin University
,Tianjin 300072
, China
e-mail: darcy.hou@gmail.com
Arris S. Tijsseling
Department of Mathematics
and Computer Science,
e-mail: a.s.tijsseling@tue.nl
and Computer Science,
Eindhoven University of Technology
,Eindhoven 5600MB
, The Netherlands
e-mail: a.s.tijsseling@tue.nl
Zafer Bozkus
Hydromechanics Laboratory,
Department of Civil Engineering,
e-mail: bozkus@metu.edu.tr
Department of Civil Engineering,
Middle East Technical University
,Ankara 06800
, Turkey
e-mail: bozkus@metu.edu.tr
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received March 2, 2013; final manuscript received December 14, 2013; published online February 27, 2014. Assoc. Editor: Jong Chull Jo.
J. Pressure Vessel Technol. Jun 2014, 136(3): 031302 (11 pages)
Published Online: February 27, 2014
Article history
Received:
March 2, 2013
Revision Received:
December 14, 2013
Citation
Hou, D. Q., Tijsseling, A. S., and Bozkus, Z. (February 27, 2014). "Dynamic Force on an Elbow Caused by a Traveling Liquid Slug." ASME. J. Pressure Vessel Technol. June 2014; 136(3): 031302. https://doi.org/10.1115/1.4026276
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