Numerical simulation method of ultrasonic wave propagation in gas-liquid two-phase flow of deepwater riser

Xu, Yuqiang; Guan, Zhichuan; Xu, Chuanbin; Liu, Yongwang; Yang, Tian; Sheng, Yanan; Sun, Shuo

doi:10.1016/j.ymssp.2018.08.038

Cited by 15 publications

(5 citation statements)

References 5 publications

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“…Therefore, the appropriate time step matching the grid size should be selected, which is determined by the Courant Friedrichs Lewy (CFL). 43,44 The relationship between the grid size and the time step in modeling is expressed as follows by CFL:…”

Section: Numerical Modelingmentioning

confidence: 99%

“…If the time step is set too small, then the total computational time will increase, and the improvement of simulation results will be very small. Therefore, the appropriate time step matching the grid size should be selected, which is determined by the Courant Friedrichs Lewy (CFL) 43,44 . The relationship between the grid size and the time step in modeling is expressed as follows by CFL:

CFL goodbreak= \frac{c normalΔ t}{h}

normalΔ t goodbreak= \frac{1}{12 f_{\max}}

where

normalΔ t

is the time step, c is the acoustic velocity m/s, and h is the mesh size.…”

Section: Ae Wave Propagation Simulationmentioning

confidence: 99%

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Investigation of wave propagation path and damage source 3D localization in parallel steel wire bundle

Liu

2022

Structural Contr & Hlth

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As one of the most important load-bearing components of cable-stayed bridges, the integrity of cables is essential to bridge condition assessment. However, the traditional one-dimensional damage location method has difficulty determining the spatial location of the damage source on parallel steel wire cables.Acoustic emission (AE) technology is a common means of structural health monitoring, and one of its most beneficial attributes is the ability to localize the damage. For this reason, a three-dimensional (3D) location algorithm based on the AE signal propagation path is proposed for cable damage localization. First, the propagation path of simulated AE signals in a parallel steel wire bundle (PSWB) was visualized using COMSOL Multiphysics software platform. Then, a 3D localization algorithm suitable for PSWB damage is proposed based on the propagation path and dispersion characteristics of AE waves. After that, experimental verifications were performed, and it was found that the damage locations can be determined accurately using the proposed algorithm. This algorithm helps to localize the damage source with only a few sensors and is crucial for cable protection and replacement.

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Section: Numerical Modelingmentioning

confidence: 99%

CFL goodbreak= \frac{c normalΔ t}{h}

normalΔ t goodbreak= \frac{1}{12 f_{\max}}

where

normalΔ t

is the time step, c is the acoustic velocity m/s, and h is the mesh size.…”

Section: Ae Wave Propagation Simulationmentioning

confidence: 99%

Investigation of wave propagation path and damage source 3D localization in parallel steel wire bundle

Liu

2022

Structural Contr & Hlth

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“…High-speed particle impact causes material damage in two ways: stripping damage to the surface and impact damage to the material's interior [19]. The impact generates substantial stress within a very short timeframe, leading to significant deformation damage [20,21]. In particle jet cutting, the cutting depth increases with jet velocity and decreases with standoff distance and moving speed, with standoff distance exerting the greatest influence on cutting volume [22].…”

Section: Introductionmentioning

confidence: 99%

Enhancing CO2 Injection Efficiency: Rock-Breaking Characteristics of Particle Jet Impact in Bottom Hole

Wang,

Zhao

2024

Atmosphere

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Storing CO2 in oil and gas reservoirs offers a dual benefit: it reduces atmospheric CO2 concentration while simultaneously enhancing oil displacement efficiency and increasing crude oil production. This is achieved by injecting CO2 into producing oil and gas wells. Employing particle jet technology at the bottom of CO2 injection wells significantly expands the bottom hole diameter, thereby improving CO2 injection efficiency and storage safety. To further investigate the rock-breaking characteristics and efficiency, a finite element model for particle jet rock breaking is established by utilizing the smoothed particle hydrodynamics (SPH) method. Specifically, this new model considers the high temperature and confining pressure conditions present at the bottom hole. The dynamic response and fracturing effects of rock subjected to a particle jet are also revealed. The results indicate that particle jet impact rebound significantly influences the size of the impact crater, with the maximum first principal stress primarily concentrated on the crater’s surface. The impact creates a “v”-shaped crater on the rock surface, with both depth and volume increasing proportionally to jet inlet velocity and particle diameter. However, beyond a key particle concentration of 3%, the increase in depth and volume becomes less pronounced. Confining pressure is found to hinder particle impact rock-breaking efficiency, while high temperatures contribute to larger impact depths and breaking volumes. This research can provide theoretical support and parameter guidance for the practical application of particle impact technology in enhancing CO2 injection efficiency at the bottom hole.

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“…The impact of fluid characteristics on cavity and seam elements leads to the identification of four driving types, with corresponding material balance equations for each type [13][14][15][16]. The curve's slope, intercept, and inflection point are used to analyze reservoir size, pressure loss before water injection, wellbore conditions, and the potential for a secondary reservoir set [11,[17][18][19][20][21]. The Tahe Oilfield's water injection method for oil production is applied to establish the relationship between water injection and pressure, using the pressure change law from wellhead to bottom-hole flow pressure to formation pressure, to calculate controlled reserves for individual wells [22,23].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Reserve Calculation Method of Fractured-Vuggy Reservoir Based on Modified Comprehensive Compression Coefficient

He,

Chen,

Yuan

et al. 2024

Processes

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The low comprehensive compressibility coefficient characteristic of fracture-vuggy reservoirs often leads to imprecise dynamic reserve calculations. This study introduces a novel method for estimating dynamic reserves, which incorporates a modified comprehensive compressibility coefficient to enhance accuracy. This methodology has been applied to 23 wells in the Tahe Oilfield, resulting in error rates substantially lower than those associated with traditional techniques, thereby markedly enhancing the accuracy of dynamic reserve estimations. Specifically, for karst cave and fracture-vuggy reservoirs, the error rate in dynamic reserve calculations is reduced to under 10%, surpassing conventional methods by more than fivefold. In the case of fractured reservoirs, despite minor fluctuations in error rates due to stress sensitivity, diversion capacity, and channel variations, the proposed method still demonstrates a significant reduction in error rates compared to standard practices.

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Numerical simulation method of ultrasonic wave propagation in gas-liquid two-phase flow of deepwater riser

Cited by 15 publications

References 5 publications

Investigation of wave propagation path and damage source 3D localization in parallel steel wire bundle

Investigation of wave propagation path and damage source 3D localization in parallel steel wire bundle

Enhancing CO2 Injection Efficiency: Rock-Breaking Characteristics of Particle Jet Impact in Bottom Hole

Dynamic Reserve Calculation Method of Fractured-Vuggy Reservoir Based on Modified Comprehensive Compression Coefficient

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