Smoothed particle hydrodynamics simulations of flow separation at bends

Hou, Qingzhi; Kruisbrink, Ach; Pearce, F. R.; Tijsseling, AS Arris; Yue, Thomas

doi:10.1016/j.compfluid.2013.11.019

Cited by 21 publications

(11 citation statements)

References 37 publications

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“…For high Reynolds flow passing a bend, flow separation easily takes place. This has been verified theoretically [24][25][26], experimentally [24] and numerically [27]. The passing of a liquid slug through an elbow is a three-dimensional flow which perhaps can be predicted through solving the full Navier-Stokes equations.…”

Section: Slug Dynamics At the Elbowmentioning

confidence: 81%

“…Lastiwka et al [36] used SPH for 1D compressible nozzle flows. Recently, it was successfully employed to model rapid pipe filling [27] and water hammer [37]. The SPH simulations of the 2D jet impinging on an inclined wall [38,39] have close relationship with the problem considered herein.…”

Section: Smoothed Particle Hydrodynamics (Sph) Methodsmentioning

confidence: 99%

“…From the literature on flow separation at bends [24][25][26][27], we realized that the assumption made in [14,16,18] that the leaving slug occupies the full cross-section of the outlet pipe is not entirely realistic. For high Reynolds flow passing a bend, flow separation easily takes place.…”

Section: Slug Dynamics At the Elbowmentioning

confidence: 99%

“…As shown by Molteni and Colagrossi [38], for free surface flows the SPH solution is not sensitive to the value of α and α = 0.1 is commonly used. Here we take α = 0.1 as in [27].…”

Section: I Dtmentioning

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 Dynamics At the Elbowmentioning

confidence: 81%

Section: Smoothed Particle Hydrodynamics (Sph) Methodsmentioning

confidence: 99%

Section: Slug Dynamics At the Elbowmentioning

confidence: 99%

“…As shown by Molteni and Colagrossi [38], for free surface flows the SPH solution is not sensitive to the value of α and α = 0.1 is commonly used. Here we take α = 0.1 as in [27].…”

Section: I Dtmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Hou

Tijsseling

Bozkuş

2014

Journal of Pressure Vessel Technology

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“…Through the assumption of suitable inflow and outflow buffer particles, this algorithm allows the enforcement of different inlet/outlet boundary conditions. This inflow/outflow algorithm has also been successfully applied to model a broad range of flow processes such as the interaction between freesurface steady currents and boats or bluff bodies (Marrone et al, 2013), gated spillway flows (Saunders et al, 2014), flow separation at bends (Hou et al, 2014) and flow over sills and weirs (Meister et al, 2014). In this context, the modeling of jets discharged into reservoirs and channel flow through the SPH technique needs appropriate inlet/outlet boundary conditions.…”

Section: Introductionmentioning

confidence: 98%

SPH modeling of plane jets into water bodies through an inflow/outflow algorithm

2015

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An innovative open boundary treatment for incompressible SPH

Khorasanizade

Sousa

2015

Numerical Methods in Fluids

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Summary An innovative inflow/outflow boundary treatment has been proposed to be used in smoothed particle hydrodynamics (SPH). Among other strategies, it involves the use of extended regions at open boundary sections and a procedure to enforce the mass continuity constraint, as well as to minimize outflow reflections. This methodology has been coupled with a modified ‘particle shifting’ algorithm, so that the robustness of the method could be ensured at high Reynolds number regimes. Confined flow around a square cylinder with an open outflow has been selected as the flow problem to analyze the performance of the new method. Detailed comparisons with data available in the literature for a variety of mesh‐based methods have been made for two different values of the blockage ratio β, namely for β = 1/4 and 1/8, and a range of supercritical Reynolds numbers. The results obtained with the present implementation of truly incompressible SPH have demonstrated numerical accuracy comparable with that of other methods, as well as the success of the open boundary treatment. A direct comparison with previously published SPH results for a distinct blockage ratio, namely for β = 1/5, has also revealed that a major improvement has been achieved by the use of the method described in this paper. Copyright © 2015 John Wiley & Sons, Ltd.

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Smoothed particle hydrodynamics simulations of flow separation at bends

Cited by 21 publications

References 37 publications

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

Dynamic Force on an Elbow Caused by a Traveling Liquid Slug

SPH modeling of plane jets into water bodies through an inflow/outflow algorithm

An innovative open boundary treatment for incompressible SPH

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