Effects of Liquid Physical Properties on the Forces Acting on a Pipe Bend in Gas–Liquid Slug Flow

Tay, Boon Li; Thorpe, Rex B.

doi:10.1205/026387604322870453

Cited by 35 publications

(28 citation statements)

References 5 publications

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“…Formula (1) is derived from a control volume (CV) around the elbow [22] and has been used to calculate the average pressure (F/A) at a bend [10,11] or on a vertical plate [8]. For steady slug flows, the velocity range is relatively low (0.1 to 5 m/s [1]), so that the generated impact pressure is small (less than 0.25 bar) and no damage is to be expected [8,10,11]. This is the reason why we stated above that steady slugs are not important for us.…”

Section: Slug Velocity and Impact Force At The Elbowmentioning

confidence: 99%

“…For a water slug emerging from the end of a horizontal pipe and impacting on a vertical plate, Sakaguchi et al [8] measured and modeled the generated force. The dynamics of a slug in nearly horizontal pipes [9], a vertical pipe with a bend [10] and an 'S' shaped riser [11] was measured and modeled. In these studies, the slug was assumed to be continuous (coherent liquid column of finite length) and steady.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Hou

Tijsseling

Bozkuş

2014

Journal of Pressure Vessel Technology

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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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Section: Slug Velocity and Impact Force At The Elbowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Hou

Tijsseling

Bozkuş

2014

Journal of Pressure Vessel Technology

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“…Therefore, it is pertinent to obtain time varying measurements of the impact and some slug characteristics, including slug velocity, liquid hold-up and pressure at the inlet and outlet of the bend that contribute to this impact. It has been shown that isolating the bend from the upstream and downstream pipe works is vital (Tay and Thorpe, 2002, 2004, 2014Fairhurst, 1983;Hargreaves and Slocombe, 1998). The experimental data discussed in this paper was collected from the same experimental rig used by Tay and Thorpe (2002, 2004, 2014.…”

Section: Experiments Set-upmentioning

confidence: 99%

Statistical analysis of the hydrodynamic forces acting on pipe bends in gas–liquid slug flow and their relation to fatigue

Tay

Thorpe

2015

Chemical Engineering Research and Design

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“…Several experimental studies have been carried out in order to understand the nature of forces caused by slug flow in pipelines (Sanchez et al, 1998) followed by (Tay and Thorpe, 2002). It is generally accepted that the short hydrodynamic slugs are the main cause of destructive forces in pipe bends and fittings (Tay and Thorpe, 2004). When the pipeline is operated at relatively low pressure and flow rates, long slugs may appear.…”

Section: Introductionmentioning

confidence: 99%

Slug Dynamics in a Nearly Horizontal Pipe Using Non-Invasive Measurement Techniques

Siddiqui¹,

Munir²,

Heikal³

et al. 2015

MAS

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This paper examines the effect of gas and liquid superficial velocities on the dynamics of the slug flow in a nearly horizontal pipeline. Instead of the invasive measurements the experiments were conducted using non-invasive techniques to measure slug frequency and bubble length in the slug flows. A simultaneous PIV-LIF technique was employed to measure the instantaneous velocity of both liquid and gas phases simultaneously using two CCD cameras. Effect of gas superficial velocity on the instantaneous measurements were studied and analyzed.

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Effects of Liquid Physical Properties on the Forces Acting on a Pipe Bend in Gas–Liquid Slug Flow

Cited by 35 publications

References 5 publications

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Statistical analysis of the hydrodynamic forces acting on pipe bends in gas–liquid slug flow and their relation to fatigue

Slug Dynamics in a Nearly Horizontal Pipe Using Non-Invasive Measurement Techniques

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