Home / Journals / FDMP / Vol.19, No.2, 2023
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In this paper, an effective measure is proposed to set up a hat oblique structure at the entrance and exit of the tunnel to alleviate the initial compression wave and micro-pressure wave. At the same time, the flow field characteristics and aerodynamic drag of the high-speed train passing through the tunnel are analyzed.

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  • Open Access

    ARTICLE

    Modeling of Crack Development Associated with Proppant Hydraulic Fracturing in a Clay-Carbonate Oil Deposit

    Sergey Galkin1,*, Ian Savitckii1, Denis Shustov1, Artyom Kukhtinskii1, Boris Osovetsky2, Alexander Votinov3
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 273-284, 2023, DOI:10.32604/fdmp.2022.021697
    Abstract Survey and novel research data are used in the present study to classify/identify the lithological type of Verey age reservoirs’ rocks. It is shown how the use of X-ray tomography can clarify the degree of heterogeneity, porosity and permeability of these rocks. These data are then used to elaborate a model of hydraulic fracturing. The resulting software can take into account the properties of proppant and breakdown fluid, thermal reservoir conditions, oil properties, well design data and even the filtration and elastic-mechanical properties of the rocks. Calculations of hydraulic fracturing crack formation are carried out and the results are compared… More >

    Graphic Abstract

    Modeling of Crack Development Associated with Proppant Hydraulic Fracturing in a Clay-Carbonate Oil Deposit

  • Open Access

    ARTICLE

    An Integrated Oil Production Enhancement Technology Based on Waterflooding Energy Recovery

    Aleksandr Lekomtsev1,*, Vitaliy Bakaneev1, Ivan Stepanenko1, Petr Maximov1, Yulia Rozhkova1, Alexey Dengaev2, Wanli Kang3
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 285-301, 2023, DOI:10.32604/fdmp.2022.019809
    (This article belongs to this Special Issue: Fluid Dynamics & Materials Processing in the Oil and Gas Industry)
    Abstract A new integrated oil production enhancement technology based on water-flooding energy recovery is proposed. After providing an extensive review of the existing scientific and technical literature on this subject, the proposed integrated technology is described together with the related process flow diagram, the criteria used to select a target facility for its implementation and the outcomes of the laboratory studies conducted to analyze emulsion formation and separation kinetics. Moreover, the outcomes of numerical simulations performed using Ansys CFX software are also presented. According to these results, using the proposed approach the incremental oil production may reach 1.2 t/day (with a 13%… More >

  • Open Access

    ARTICLE

    A Novel Method for Wet Gas Flow Measurements Based on an Over-Reading Principle

    Jinjing Zhang, Jia Li*
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 303-313, 2023, DOI:10.32604/fdmp.2022.020723
    Abstract

    A novel method to measure the flow rate in a wet gas is presented. Due to the presence of liquid, there is a deviation in the measurement of the gas volume flow rate obtained with standard vortex flow-meters. The proposed method is based on a correction factor determined through the application of an over-reading approach to a bluff body in mist flow. The correction factor is obtained from the slip velocity ratio, i.e., the ratio of droplet velocity to gas velocity, based on the analysis of the fluid velocity distribution in the pipeline section. It also takes into account relevant… More >

    Graphic Abstract

    A Novel Method for Wet Gas Flow Measurements Based on an Over-Reading Principle

  • Open Access

    ARTICLE

    Tubing Dimension Optimization for the Development of an Offshore Gasfield

    Donglei Jiang1, Heng Wang1, Huan Diao1, Tan Xiao1, Yi Yu1, Chunmin Zeng1, Rui Zhang2,*, Qi Huang2, Mingbo Wang2
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 315-327, 2023, DOI:10.32604/fdmp.2022.020221
    Abstract L1 is one of the largest offshore gas fields currently under development. In order to optimize the related design, nodal analysis is applied (including proper consideration of the plant productivity, sensitivity to the tubing size, erosion effects, liquid carrying performance, and tubing string). As a result of such approach, it is shown that 13Cr material should be chosen as the appropriate tubing material. Moreover, 3-1/2 inches 9.3 lb/ft N80 tubing, 4-1/2 inches 12.75 lb/ft N80 tubing, 5-1/2 inches 17 lb/ft N80 tubing should be used for a gas production rate under 80 × 104 m3/d, between 80 × 104 m3/d and 120 × 104 m3/d and above 120 × 104 m3/d,… More >

  • Open Access

    ARTICLE

    Integrity and Failure Analysis of Cement Sheath Subjected to Coalbed Methane Fracturing

    Lingyun Zhao1,2, Heng Yang3,4,*, Yuanlong Wei1,2,*, Yuhuan Bu3,4, Shaorui Jing3,4, Peiming Zhou1,2
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 329-344, 2023, DOI:10.32604/fdmp.2022.020216
    (This article belongs to this Special Issue: Dynamics and Materials Processing in Petroleum Engineering)
    Abstract Perforation and fracturing are typically associated with the development of coalbed methane wells. As the cement sheath is prone to failure during this process, in this work, the effects of the casing pressure, elastic modulus of the cement, elastic modulus of the formation, and casing eccentricity on the resulting stresses are analyzed in the frame of a finite element method. Subsequently, sensitivity response curves of the cement sheath stress are plotted by normalizing all factors. The results show that the maximum circumferential stress and Mises stress of the cement sheath increase with the casing internal pressure, elastic modulus of the… More >

    Graphic Abstract

    Integrity and Failure Analysis of Cement Sheath Subjected to Coalbed Methane Fracturing

  • Open Access

    ARTICLE

    Numerical Analysis of the Tunnel-Train-Air Interaction Problem in a Tunnel with a Double-Hat Oblique Hood

    Zongfa Zhang1, Minglu Zhang1,*, Xinbiao Xiao2
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 345-359, 2023, DOI:10.32604/fdmp.2022.020233
    Abstract The tunnel-train-air interaction problem is investigated by using a numerical method able to provide relevant information about pressure fluctuations, aerodynamic drag characteristics and the “piston wind” effect. The method relies on a RNG k-ε two-equation turbulence model. It is shown that although reducing the oblique slope can alleviate the pressure gradient resulting from initial compression waves at the tunnel entrance, the pressure fluctuations in the tunnel are barely affected; however, a large reduction of micro-pressure wave amplitudes is found outside the tunnel. In comparison to the case where no tunnel hood is present, the amplitudes of micro-pressure waves at 40… More >

    Graphic Abstract

    Numerical Analysis of the Tunnel-Train-Air Interaction Problem in a Tunnel with a Double-Hat Oblique Hood

  • Open Access

    ARTICLE

    Analysis of Channeling-Path Phenomena in a Complex Fault-Block Reservoir with Low Recovery Factor and High Water-Cut Ratio

    Qunyi Wang1, Xiaoli Ma1, Yongbin Bi1, Haiyan He1, Xiao Gu1, Tongjing Liu2,*, Lekun Zhao3
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 361-377, 2023, DOI:10.32604/fdmp.2022.020358
    Abstract Current methods for the analysis of channeling-path phenomena in reservoirs cannot account for the influence of time and space on the actual seepage behavior. In the present study, this problem is addressed considering actual production data and dynamic characteristic parameters quantitatively determined in the near wellbore area by fitting the water-cut curve of the well. Starting from the dynamic relationship between injection and production data, the average permeability is determined and used to obtain a real-time quantitative characterization of the seepage behavior of the channeling-path in the far wellbore area. For the considered case study (Jidong oilfield), it is found… More >

  • Open Access

    ARTICLE

    Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

    Yukun Lv1, Fan Yang1,*, Zi’an Wei1, Quan Lu2
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 379-397, 2023, DOI:10.32604/fdmp.2022.020373
    Abstract Leakage occurring in the tube sockets of the main steam thermometers can seriously threaten the safe operation of coal-fired power plants. Here, assuming a 300 MW unit as a relevant testbed, this problem is investigated numerically through solution of the equations of fluid-dynamics in synergy with the mathematical treatment of relevant statistics. The results indicate that the steam can form a large-scale spiral flow inside the tube socket and continuously scour the inner wall. In the model with the protective casing setting angle of 60°, the average tangential fluid velocity can reach up to 4.8 m/s, which is about twice higher… More >

    Graphic Abstract

    Numerical Analysis of the Erosion Mechanism inside the Tube Sockets of Main Steam Thermometers in a Coal-Fired Power Plant

  • Open Access

    ARTICLE

    Analysis of the Microstructure of a Failed Cement Sheath Subjected to Complex Temperature and Pressure Conditions

    Zhiqiang Wu1,2, Yi Wu2, Renjun Xie2, Jin Yang1, Shujie Liu3, Qiao Deng4,*
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 399-406, 2023, DOI:10.32604/fdmp.2022.020402
    (This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)
    Abstract One of the main obstacles hindering the exploitation of high-temperature and high-pressure oil and gas is the sealing integrity of the cement sheath. Analyzing the microstructure of the cement sheath is therefore an important task. In this study, the microstructure of the cement sheath is determined using a CT scanner under different temperature and pressure conditions. The results suggest that the major cause of micro-cracks in the cement is the increase in the casing pressure. When the micro-cracks accumulate to a certain extent, the overall structure of the cement sheath is weakened, resulting in gas channeling, which poses a direct… More >

  • Open Access

    REVIEW

    Numerical Analysis of the Mixed Flow of a Non-Newtonian Fluid over a Stretching Sheet with Thermal Radiation

    Nourhan I. Ghoneim1,*, Ahmed M. Megahed2
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 407-419, 2023, DOI:10.32604/fdmp.2022.020508
    Abstract A mathematical model is elaborated for the laminar flow of an Eyring-Powell fluid over a stretching sheet. The considered non-Newtonian fluid has Prandtl number larger than one. The effects of variable fluid properties and heat generation/absorption are also discussed. The balance equations for fluid flow are reduced to a set of ordinary differential equations through a similarity transformation and solved numerically using a Chebyshev spectral scheme. The effect of various parameters on the rate of heat transfer in the thermal boundary regime is investigated, i.e., thermal conductivity, the heat generation/absorption ratio and the mixed convection parameter. Good agreement appears to… More >

  • Open Access

    ARTICLE

    Optimization of the Plugging Agent Dosage for High Temperature Salt Profile Control in Heavy Oil Reservoirs

    Jiayu Ruan1, Mingjing Lu2,3, Wei Zhang4, Yuxi Zhang1, Yuhui Zhou1,*, Jie Gong1, Fan Wang1, Yuanxiao Guan1
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 421-436, 2023, DOI:10.32604/fdmp.2022.020665
    (This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)
    Abstract After steam discharge in heavy oil reservoirs, the distribution of temperature, pressure, and permeability in different wells becomes irregular. Flow channels can easily be produced, which affect the sweep efficiency of the oil displacement. Previous studies have shown that the salting-out plugging method can effectively block these channels in high-temperature reservoirs, improve the suction profile, and increase oil production. In the present study, the optimal dosage of the plugging agent is determined taking into account connection transmissibility and inter-well volumes. Together with the connectivity model, a water flooding simulation model is introduced. Moreover, a non-gradient stochastic disturbance algorithm is used… More >

  • Open Access

    ARTICLE

    Analysis of the Performances and Optimization of Polyurethane Concrete with a Large Percentage of Fly Ash

    Tingting Huo1, Jiaquan Xue2,*, Zhi’an Fu3
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 437-450, 2023, DOI:10.32604/fdmp.2022.020696
    (This article belongs to this Special Issue: Advanced Materials, Processing and Testing Technology)
    Abstract The properties of polyurethane concrete containing a large amount of fly ash are investigated, and accordingly, a model is introduced to account for the influence of fly ash fineness, water ratio, and loss of ignition (LOI) on its mechanical performances. This research shows that, after optimization, the concrete has a compressive strength of 20.8 MPa, a flexural strength of 3.4 MPa, and a compressive modulus of elasticity of 19.2 GPa. The main factor influencing 28 and 90 d compressive strength is fly ash content, water-binder ratio, and early strength agent content. More >

  • Open Access

    ARTICLE

    Laser Additive Manufacturing of 316L Stainless Steel Thin-wall Ring Parts

    Yanhua Zhao1,3,*, Wenhao Tian1, Jianhua Liu1, Dongqing Qian2, Wei Meng1, Jiaming Wang1
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 451-470, 2023, DOI:10.32604/fdmp.2022.021035
    Abstract The process parameters of laser additive manufacturing have an important influence on the forming quality of the produced items or parts. In the present work, a finite element model for simulating transient heat transfer in such processes has been implemented using the ANSYS software, and the temperature and stress distributions related to 316L stainless steel thin-walled ring parts have been simulated and analyzed. The effect of the laser power, scanning speed, and scanning mode on temperature distribution, molten pool structure, deformation, and stress field has been studied. The simulation results show that the peak temperature, weld pool size, deformation, and… More >

  • Open Access

    ARTICLE

    Unsteady Flow and Heat Transfer of a Casson Micropolar Nanofluid over a Curved Stretching/Shrinking Surface

    Muhammad A. Sadiq1,2,*, Nadeem Abbas3, Haitham M. S. Bahaidarah4, Mohammad Amjad5
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 471-486, 2023, DOI:10.32604/fdmp.2022.021133
    (This article belongs to this Special Issue: Electro- magnetohydrodynamic Nanoliquid Flow and Heat Transfer)
    Abstract We present the results of an investigation into the behavior of the unsteady flow of a Casson Micropolar nanofluid over a shrinking/stretching curved surface, together with a heat transfer analysis of the same problem. The body force acting perpendicular to the surface wall is in charge of regulating the fluid flow rate. Curvilinear coordinates are used to account for the considered curved geometry and a set of balance equations for mass, momentum, energy and concentration is obtained accordingly. These are turned into ordinary differential equations using a similarity transformation. We show that these equations have dual solutions for a number… More >

  • Open Access

    ARTICLE

    Flow Structure and Short-Term Riverbed Evolution in Curved Flumes

    Shuxian Gao1, Yonggang Cao2,*, Yuchuan Bai3, Yanhua Yang1
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 487-500, 2023, DOI:10.32604/fdmp.2022.021149
    Abstract River bending is the major effect responsible for bed topography and bank changes. In this study, fluid velocity (measured by a three-dimensional Doppler advanced point current meter) and bed topographical data have been collected in 40 sections of an experimental model. The whole flume was composed of an organic glass bend, upstream and downstream water tanks, two transition straight sections, a circulation pump, and a connection pipeline. Each section has been found to be characterized by a primary circulation and a small reverse circulation, with some sections even presenting three more or more circulation structures. The minimum circulation intensity has… More >

  • Open Access

    ARTICLE

    Pipes with Trapezoidal Cut Twisted Tape Inserts in the Laminar Flow Regime: Nusselt Number and Friction Coefficient Analysis

    Shrikant Arunrao Thote*, Netra Pal Singh
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 501-511, 2023, DOI:10.32604/fdmp.2022.021502
    Abstract The thermal behavior of pipes with a twisted tape inside (used to enhance heat transfer through the tube wall) is studied in the laminar flow regime. Oil is used as the work fluid with the corresponding Reynolds Number spanning the interval 200–2000. It is found that in such conditions the ‘Nusselt Number’ (Nu) gradually increases with reducing the tape twist ratio, whereas the friction factor is detrimentally affected by the presence of the tape (as witnessed by the comparison with the companion case where a plain tube is considered). In particular, it is shown that the heat transfer efficiency can… More >

  • Open Access

    ARTICLE

    Numerical Study of Natural Convective Heat Transfer in an Air Filled Square Cavity Heated from Below and Symmetrically Cooled from the Sides with a Partition in the Hot Wall

    Farah Zemani-Kaci*, Amina Sabeur-Bendhina
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 513-539, 2023, DOI:10.32604/fdmp.2022.021974
    (This article belongs to this Special Issue: Materials and Energy an Updated Image for 2021)
    Abstract A two-dimensional numerical study of laminar natural convection in a square enclosure filled with air with a wall partially heated on the bottom is presented. The heat source is located on the lower wall with different heated widths varied from 20 to 80%(ε = 0.2–0.8) of the total width of the lower wall and different heights h = H/4 and H/2 of the partition. The effect of the partition height on the main system dynamics is investigated through solution of the two-dimensional Navier–Stokes equations and the energy equation by means of a finite volume method based on the SIMPLE algorithm.… More >

    Graphic Abstract

    Numerical Study of Natural Convective Heat Transfer in an Air Filled Square Cavity Heated from Below and Symmetrically Cooled from the Sides with a Partition in the Hot Wall

  • Open Access

    ARTICLE

    Analysis of a Stagnation Point Flow with Hybrid Nanoparticles over a Porous Medium

    U. S. Mahabaleshwar1, T. Anusha1 and M. Hatami2,*
    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.2, pp. 541-567, 2023, DOI:10.32604/fdmp.2022.022002
    Abstract The unsteady stagnation-point flow of a hybrid nanofluid over a stretching/shrinking sheet embedded in a porous medium with mass transpiration and chemical reactions is considered. The momentum and mass transfer problems are combined to form a system of partial differential equations, which is converted into a set of ordinary differential equations via similarity transformation. These ordinary differential equations are solved analytically to obtain the solution for velocity and concentration profiles in exponential and hypergeometric forms, respectively. The concentration profile is obtained for four different cases namely constant wall concentration, uniform mass flux, general power law wall con-centration and general power… More >

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