Numerical modeling of local scour and forces for submarine pipeline under surface waves

Liu, Mingming; Lü, Lin; Teng, Bin; Zhao, Ming; Tang, Guoqiang

doi:10.1016/j.coastaleng.2016.05.003

Cited by 41 publications

(22 citation statements)

References 29 publications

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“…The two-dimensional incompressible Reynolds-Averaged Navier-Stokes equations are adopted to describe the turbulence flow of incompressible viscous fluid. The governing equations in the Arbitrary Lagrangian-Eulerian (ALE) frame can be written as (Liu et al [21])…”

Section: Governing Equation and Turbulence Modelmentioning

confidence: 99%

Numerical Investigation of Vortex Induced Vibration for Submerged Floating Tunnel under Different Reynolds Numbers

Jin

Liu

Geng

et al. 2020

Water

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A 2D numerical model was established to investigate vortex induced vibration (VIV) for submerged floating tunnel (SFT) by solving incompressible viscous Reynolds average Navier-Stokes equations in the frame of Abitrary Lagrangian Eulerian (ALE). The numerical model was closed by solving SST k-ω turbulence model. The present numerical model was firstly validated by comparing with published experimental data, and the comparison shows that good achievement is obtained. Then, the numerical model is used to investigate VIV for SFT under current. In the simulation, the SFT was allowed to oscillate in cross flow direction only under the constraint of spring and damping. The force coefficients and motion of SFT were obtained under different reduced velocity. Further research showed that Reynolds number has not only a great influence on the vibration amplitude and ‘lock-in’ region, but also on the force coefficients on of the SFT. A large Reynolds number results in a relatively small ‘lock-in’ region and force coefficient.

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Section: Governing Equation and Turbulence Modelmentioning

confidence: 99%

Numerical Investigation of Vortex Induced Vibration for Submerged Floating Tunnel under Different Reynolds Numbers

Jin

Liu

Geng

et al. 2020

Water

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“…The governing equation of the surface wave after the pile foundation [2] can be written as where 1 = and 2 = are the horizontal and vertical coordinates, respectively, is the fluid velocity in the -direction, is the velocity of moving grid in the -direction, is the time, is the pressure, is the wave density, is the kinematic viscosity of the fluid, denotes the gravitational acceleration, and is the mean strain rate tensor with = ( / + / )/2. The stress term in (6) reads = ( / + / ) + 2 /3, where is the turbulent eddy viscosity, is the turbulence kinetic energy, and is the Kronecker operator.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Ong et al [1] provided a practical stochastic method based on assuming the waves to be a stationary narrowband random process and compared it with the Sumer and Freds data for 2D random waves plus current. Liu et al [2] gave a review of the two-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations with a Shear-Stress Transport (SST) -turbulence closure to establish a two-dimensional numerical model. The roles of local scour around submarine pipelines induced by the orbital fluid motion under surface water waves were discussed.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Simulation of Base Shear Forces and Moments Exerted by Waves on Large Diameter Pile

Cheng

Xue

et al. 2017

Mathematical Problems in Engineering

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To solve the problem of the dynamic variation of wave force diameter of pile foundation for offshore wind turbines, wave force and moment of large diameter pile foundation can be calculated. In this paper, simulation technique is used to calculate the wave force and moment of different large diameter pile foundation, and the base shear force and moment of the interval 20-degree phase angle are obtained by the base line of the pile. Under the action of a certain load, the complete stress variation of the pile foundation is obtained. According to the basic principle of diffraction theory, the process curve of large diameter pile, and analysis of wave force, diffraction force changes in a certain period of time interval. The results show that the wave after the large diameter pile formed around the vortex, large diameter pile base shear, and moment dynamic change is nonlinear in a complete cycle, the diameter of the pile increases by 0.5 m, and the wave force increases by about 5%, the results show that it provides certain reference value for the offshore pile foundation pile with large diameter primary site. Some significant results for practical application are discussed.

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“…The aim of this study is to establish a 2D viscous numerical model to simulate fluid resonance in narrow gaps by using Arbitrary Lagrangian-Eulerian (ALE) method. This numerical model is an extension of the previous model proposed by Zhao and Cheng 12 and Liu et al 13 This article is organized as follows. The details of the numerical model will be described in the ''Numerical models'' section, followed by necessary numerical validations in the ''Numerical validations'' section.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of fluid resonance in narrow gaps of fixed rectangular structures

Liu

Jin

Cui

2019

Advances in Mechanical Engineering

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A two-dimensional numerical model is developed to investigate the phenomenon of resonance in narrow gaps. Instead of using commonly used Volume of Fluid method to capture the free surface which is sometimes difficult to capture the geometric properties of the geometrically complicated interface, the free surface is traced by using Arbitrary Lagrangian–Eulerian method. The numerical model is based on the two-dimensional Reynolds-Averaged Navier–Stokes equations. The numerical model is validated against wave propagation in wave flume. Comparisons between the numerical results and available theoretical data show satisfactory agreements. Fluid resonance in narrow gaps of fixed rectangular structures are simulated. Numerical results show that resonance wave height and wave frequency for rectangle boxes with sphenoid corners is larger than for rectangle boxes.

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Numerical modeling of local scour and forces for submarine pipeline under surface waves

Cited by 41 publications

References 29 publications

Numerical Investigation of Vortex Induced Vibration for Submerged Floating Tunnel under Different Reynolds Numbers

Numerical Investigation of Vortex Induced Vibration for Submerged Floating Tunnel under Different Reynolds Numbers

A Numerical Simulation of Base Shear Forces and Moments Exerted by Waves on Large Diameter Pile

Numerical modeling of fluid resonance in narrow gaps of fixed rectangular structures

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