Open Access

ARTICLE

Jun Feng^1,2, Tao Bian^1,2,5, Qianpeng Han², Bing Wang^1,3,4,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 1-14, 2023, DOI:10.32604/fdmp.2023.018275
Abstract The influence of the width of the circular ring of a car cooling fan on the aerodynamic noise is investigated numerically through the determination of the overall sound pressure level (OASPL). The results demonstrate that when the circular rings cover near 2/3 of the width of the blade tips of the rotor in the axis direction, the rotor has the lowest OASPL and the related total pressure efficiency and flow mass rate are better than the corresponding values obtained for a reference rotor without a circular ring. With increasing the width of the circular ring in the axis direction, the… More >

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Alim Al Ayub Ahmed^1,*, Salim Oudah Mezan², Binyamin³, Murtadha Doghiam Abdullah⁴, Elena Tesleva⁵, Linar G. Akhmetov⁶, Rustem Zalilov⁷, Mustafa M. Kadhim^8,9,10, Abduladheem Turki Jalil^11,12
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 15-24, 2023, DOI:10.32604/fdmp.2022.019922
（This article belongs to this Special Issue: Advances in Fluid Flow and Smart Materials)
Abstract The utilization of vortex generators to increase heat transfer from cylinders installed inside a duct is investigated. In particular, a channel containing eight cylinders with volumetric heat sources is considered for different values of the Reynolds number. The effective possibility to use vortex generators with different sizes to increase heat transfer and, consequently, reduce the surface temperature of the cylinders is examined. Also, the amount of pressure drop inside the channel due to the presence of vortex generators is considered and compared with the cases without vortex generators. The results show that although the addition of generators increases the pressure… More >

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ARTICLE

Xiao Wu^*, Zhaoting Wang, Longfei Dong, Yanping Xin, Tianshu Yu
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 25-36, 2023, DOI:10.32604/fdmp.2023.020953
（This article belongs to this Special Issue: Advanced Oil and Gas Transportation and Treatment Technologies)
Abstract The Mixed Refrigerant (MR) component is an important factor influencing the performances of natural gas liquefaction processes. However, there is a lack of systematic research about the utilization of propane pre-cooled (C3/MRC). In this paper, this mixed refrigerant cycle liquefaction process is simulated using the HYSYS software and the main influential parameters involved in the process are varied to analyze their influence on the liquefaction rate and power consumption. The results show that an effective way for lowering the power consumption of the compressor consists of reducing the flow through the compressor through optimization of the percentage of mixed refrigerant.… More >

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ARTICLE

Xiaowei Nie¹, Lihui Ma^2,*, Yiqiu Xu³, Dong Sun², Weibo Zheng², Liang Zhou², Xiaodong Wang², Xiaohan Zhang², Weijia Dong², Yunfei Li²
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 37-50, 2023, DOI:10.32604/fdmp.2023.021118
（This article belongs to this Special Issue: Advanced Oil and Gas Transportation and Treatment Technologies)
Abstract An experimental study was conducted to investigate the properties of stratified regular or wavy two-phase flow in two parallel separators located after a manifold. A total of 103 experiments with various gas and liquid velocity combinations in three inlet pipes were conducted, including 77 groups of outlet pipe resistance symmetry and 26 groups of outlet pipe resistance asymmetry trials. The experimental results have revealed that when the gas-liquid flow rate is low, the degree of uneven splitting is high, and “extreme” conditions are attained. When the superficial gas velocity is greater than that established in the extreme case, the direction… More >

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Wei Cui^1,2,*, Zhilun Yan^1,2, Zhi Tang^1,2, Mengyao Xu^1,2, Jian Tian^1,2, Chengyi Shen^1,2
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 51-60, 2023, DOI:10.32604/fdmp.2023.021499
（This article belongs to this Special Issue: Advanced Oil and Gas Transportation and Treatment Technologies)
Abstract At present, methods for treating tertiary oil recovery wastewater via electro-coagulation are still in their early stage of development. In this study, a device for electro-coagulation wastewater treatment was built and tested in an oil field. The effects that the initial pH value, electrode type, and connection mode have on the coagulation and separation effect were assessed by measuring the mass fraction and turbidity of oil. The results have shown that when the electro-coagulation method is used, the effectiveness of the treatment can be significantly increased in neutral pH conditions (pH = 7), in acidic conditions, and in alkaline conditions. Compared to… More >

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546

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ARTICLE

Muhammad Salman Kausar¹, H.A.M. Al-Sharifi², Abid Hussanan^3,*, Mustafa Mamat¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 61-81, 2023, DOI:10.32604/fdmp.2023.021590
（This article belongs to this Special Issue: Electro- magnetohydrodynamic Nanoliquid Flow and Heat Transfer)
Abstract In this paper, the effects of thermal radiation and viscous dissipation on the stagnation–point flow of a micropolar fluid over a permeable stretching sheet with suction and injection are analyzed and discussed. A suitable similarity transformation is used to convert the governing nonlinear partial differential equations into a system of nonlinear ordinary differential equations, which are then solved numerically by a fourth–order Runge–Kutta method. It is found that the linear fluid velocity decreases with the enhancement of the porosity, boundary, and suction parameters. Conversely, it increases with the micropolar and injection parameters. The angular velocity grows with the boundary, porosity,… More >

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ARTICLE

Chang Huang, Shuzhan Bai, Guoxiang Li^*, Ke Sun^*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 83-93, 2023, DOI:10.32604/fdmp.2022.021662
（This article belongs to this Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences II)
Abstract The influence of heterogeneous flow injection of urea at different velocities and temperatures on NOx conversion efficiency, ammonia storage and ammonia leakage is investigated experimentally. A diesel engine employing a selective catalytic reduction (SCR) technology is considered. It is found that for a fixed injection velocity, the degree of ammonia leakage changes depending on the temperature. The higher the temperature, the faster the catalytic reduction reaction and the smaller the degree of ammonia leakage. The temperature has a great influence on the catalytic reduction reaction rate. At an injection velocity of 10000/h, the average reaction rate at 420 C is… More >

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ARTICLE

Aouatif Saad^1,*, Mohammed EL Ganaoui²
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 95-103, 2023, DOI:10.32604/fdmp.2023.022014
（This article belongs to this Special Issue: Materials and Energy an Updated Image for 2021)
Abstract Resin transfer molding (RTM) is among the most used manufacturing processes for composite parts. Initially, the resin cure is initiated by heat supply to the mold. The supplementary heat generated during the reaction can cause thermal gradients in the composite, potentially leading to undesired residual stresses which can cause shrinkage and warpage. In the present numerical study of these processes, a one-dimensional finite difference method is used to predict the temperature evolution and the degree of cure in the course of the resin polymerization; the effect of some parameters on the thermal gradient is then analyzed, namely: the fiber nature,… More >

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ARTICLE

Jingpeng Wang¹, Wei Zhang¹, Zhiwei Lin¹, Lin Song¹, Shiyuan Xie¹, Qi Liu², Wei Wang², Tao Yang², Kai Xu², Meng Li², Yuqiang Xu^3,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 105-116, 2023, DOI:10.32604/fdmp.2023.020049
（This article belongs to this Special Issue: Dynamics and Materials Processing in Petroleum Engineering)
Abstract An uncertainty analysis method is proposed for the assessment of the residual strength of a casing subjected to wear and non-uniform load in a deep well. The influence of casing residual stress, out-of-roundness and non-uniform load is considered. The distribution of multi-source parameters related to the residual anti extrusion strength and residual anti internal pressure strength of the casing after wear are determined using the probability theory. Considering the technical casing of X101 well in Xinjiang Oilfield as an example, it is shown that the randomness of casing wear depth, formation elastic modulus and formation Poisson’s ratio are the main… More >

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ARTICLE

Abed Hawila^1,2,3, Hala Alsalloum⁴, Abdelatif Merabtine^1,*, Farouk Fardoun^4,5, Rachid Bennacer⁶
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 117-134, 2023, DOI:10.32604/fdmp.2022.022151
（This article belongs to this Special Issue: Materials and Energy an Updated Image for 2021)
Abstract The feasibility of Plus Energy Building for a sample relevant case is investigated. After a literature review aimed to identify key aspects of this type of buildings, a preliminary evaluation of the thermal performance of a building constructed using conventional material is presented together with a parametric analysis of the impact of typical influential parameters. Solar domestic hot water (SDHW) and photovoltaic systems (PV) are considered in the study. Numerical simulations indicate that for the examined sample case (Beirut in Lebanon) the total annual energy need of conventional building is 87.1 kWh/y.m² . About 49% of energy savings can be… More >

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ARTICLE

Fatih Çelik^1,*, Oğuzhan Yıldız², Andaç Batur Çolak³, Samet Mufit Bozkır¹
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 135-158, 2023, DOI:10.32604/fdmp.2022.021014
（This article belongs to this Special Issue: Nanotechnology applications in fluid dynamics and materials science)
Abstract In this study, the workability of cement-based grouts containing n-TiO₂ nanoparticles and fly ash has been investigated experimentally. Several characteristic quantities (including, but not limited to, the marsh cone flow time, the mini slump spreading diameter and the plate cohesion meter value) have been measured for different percentages of these additives. The use of fly ash as a mineral additive has been found to result in improvements in terms of workability behavior as expected. Moreover, if nano titanium oxide is also used, an improvement can be obtained regarding the bleeding values for the cement-based grout mixes. Using such experimental data,… More >

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Bolin Jiang^1,*, Shanshan Wu², Min Ji¹, Bo Liang³
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 159-173, 2023, DOI:10.32604/fdmp.2022.020730
Abstract Submerged floating tunnel (SFTs) are typically subjected to complex external environmental and internal loads such as wave currents and traffic load. In this study, this problem is investigated through a finite element method able to account for fluid-structure interaction. The obtained results show that increasing the number of vehicles per unit length enhances the transverse vibrational displacements of the SFT cross sections. Under ultimate traffic load condition, one-way and two-way syntropic distributions can promote the dynamic responses of SFTs whereas two-way reverse distributions have the opposite effect. More >

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Xuanyu Dong^1,*, Jingyao Yang²
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 175-185, 2023, DOI:10.32604/fdmp.2022.021345
（This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)
Abstract A new numerical model for low-permeability reservoirs is developed. The model incorporates the nonlinear characteristics of oil-water two-phase flows while taking into account the initiation pressure gradient. Related numerical solutions are obtained using a finite difference method. The correctness of the method is demonstrated using a two-dimensional inhomogeneous low permeability example. Then, the differences in the cumulative oil and water production are investigated for different starting water saturations. It is shown that when the initial water saturation grows, the water content of the block continues to rise and the cumulative oil production gradually decreases. More >

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M. K. Shilpa¹, Md Abdul Raheman², Abdul Aabid^3,*, Muneer Baig³, R. K. Veeresha⁴, Nagesh Kudva⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 187-206, 2023, DOI:10.32604/fdmp.2022.020351
（This article belongs to this Special Issue: Materials, Energy, and Fluid Dynamics)
Abstract Conventional refrigeration processes release ammonia and freon into the atmosphere, which results in global warming. These problems may be overcome by using thermoelectric modules because of the absence of coolants or refrigerants in these systems. However, the cooling performances of such modules are relatively small in comparison to those of conventional refrigerators. In this paper, the working principles of thermoelectric modules are discussed together with a review of different relevant aspects, namely: the thermoelectric materials, and their mechanical properties used to build thermoelectric devices, different types of thermoelectric devices available on the market, mathematical modeling of thermoelectric materials, and various… More >

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ARTICLE

Hao Tian, Yongkang Zheng^*, Hanxin Zhang
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 207-222, 2023, DOI:10.32604/fdmp.2023.019790
（This article belongs to this Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences)
Abstract In this paper, some typical methods to promote mixing in supersonic combustion are reviewed, and the fluid-dynamic mechanism underpinning the development of the supersonic shear layer in the presence of a streamwise vortex is analyzed through computational fluid dynamics. It is proven that the streamwise vortex-couple method is an excellent approach to enhance mixing. A specific combustor design is proposed accordingly. More >

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ARTICLE

Rida Tazi¹, Adil Echchelh¹, Mohammed Hattabi², Mohammed El Ganaoui³, Aouatif Saad^4,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 223-232, 2023, DOI:10.32604/fdmp.2023.021976
（This article belongs to this Special Issue: Materials and Energy an Updated Image for 2021)
Abstract The successful manufacture of thick composites is challenging since the highly exothermic nature of thermoset resins and limited temperature control make avoiding the onset of detrimental thermal gradients within the composite relatively difficult. This phenomenon is mainly caused by exothermic heat reactions. The so-called Michaud's model has been largely used in the literature to reduce the gap between experience and simulation with regard to the effective prediction of the temperature cycle in these processes. In this work, another solution is proposed to simulate the curing process for thick composites, namely preheating the resin to activate the curing reaction before resin… More >

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524

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ARTICLE

Mohammad Reza Hajmohammadi¹, Javad Najafiyan¹, Giulio Lorenzini^2,*
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 233-244, 2023, DOI:10.32604/fdmp.2023.019763
Abstract In this study, three computational approaches for the optimization of a thermal conduction problem are critically compared. These include a Direct Method (DM), a Genetic Algorithm (GA), and a Pattern Search (PS) technique. The optimization aims to minimize the maximum temperature of a hot medium (a medium with uniform heat generation) using a constant amount of high conductivity materials (playing the role of fixed factor constraining the considered problem). The principal goal of this paper is to determine the most efficient and fastest option among the considered ones. It is shown that the examined three methods approximately lead to the… More >

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ARTICLE

Yuhui Zhou^1,2,3,*, Shichang Ju⁴, Qijun Lyu⁴, Hongfei Chen⁴, Xuebiao Du⁴, Aiping Zheng⁴, Wenshun Chen⁴, Ning Li⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 245-259, 2023, DOI:10.32604/fdmp.2023.019971
（This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)
Abstract It is known that the pore media characteristics of glutenite reservoirs are different from those of conventional sandstone reservoirs. Low reservoir permeability and naturally developed microfractures make water injection in this kind of reservoir very difficult. In this study, new exploitation methods are explored. Using a real glutenite reservoir as a basis, a three-dimensional fine geological model is elaborated. Then, combining the model with reservoir performance information, and through a historical fitting analysis, the saturation abundance distribution of remaining oil in the reservoir is determined. It is shown that, using this information, predictions can be made about whether the considered… More >

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Yanxian Wu¹, Shouming Zhong¹, Zhigang Guan¹, Lin Song¹, Kun Li², Jiarui Sun², Yuqiang Xu^2,*, Maochuan Tu³, Chaobin Fan³, Jinbin Yang⁴
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 261-271, 2023, DOI:10.32604/fdmp.2023.020076
（This article belongs to this Special Issue: Dynamics and Materials Processing in Petroleum Engineering)
Abstract A three-dimensional model for the numerical simulation of casing-cement behavior is used to investigate residual strength in the perforated casing of ultra deep wells. The influence of the hole diameter, hole density and phase angle on the residual strength of the casing under non-uniform stress and fracturing conditions is revealed through the consideration of different perforation parameters. It is shown that the residual strength of the casing increases with the hole diameter and periodically changes with the hole density; the phase angle is the main factor that affects the residual strength of the perforated casing, and the perforation should be… More >

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