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Neural downscaling for complex systems: from large-scale to small-scale by neural operator Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-09-19 Pengyu Lai, Jing Wang, Rui Wang, Dewu Yang, Haoqi Fei, Yihe Chen, Hui Xu
Researchers have long been working on interpreting and predicting the dynamics of complex systems in various fields. Conventional methods including full-scale simulations and reduced-order models a...
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Computational study on cilia transport of Prandtl nanofluid (blood-Fe3O4) enhancing convective heat transfer along microorganisms under electroosmotic effects in wavy capillaries Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-17 Madiha Ajmal, Rashid Mehmood, Noreen Sher Akbar, Taseer Muhammad
Purpose This study aims to focuse on the flow behavior of a specific nanofluid composed of blood-based iron oxide nanoparticles, combined with motile gyrotactic microorganisms, in a ciliated channel with electroosmosis. Design/methodology/approach This study applies a powerful mathematical model to examine the combined impacts of bio convection and electrokinetic forces on nanofluid flow. The presence
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Monotonic unbounded schemes transformer (MUST): an approach to remove undershoots and overshoots in family of unbounded schemes using finite-volume method Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-17 Y.F. Yap, J.C. Chai
Purpose This paper presents a Monotonic Unbounded Schemes Transformer (MUST) approach to bound/monotonize (remove undershoots and overshoots) unbounded spatial differencing schemes automatically, and naturally. Automatically means the approach (1) captures the critical cell Peclet number when an unbounded scheme starts to produce physically unrealistic solution automatically, and (2) removes the undershoots
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Multivariate gradient structure design of flexible thermoplastic polyurethane based composite foam for enhanced electromagnetic interference shielding performance J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-09-16 Panfeng Shao, Xiaohan Wang, Yishen Zhao, Fangfang Zou, Guangxian Li, Xia Liao
Flexible and efficient electromagnetic interference (EMI) shielding polymer composite foams are rapidly developing, but it is difficult to avoid the deterioration of shielding properties after foaming. To solve the issue, in this work, composite foams with multivariate gradient structure of thermoplastic polyurethane (TPU) mixed with multiwalled carbon nanotubes (MWCNTs) were constructed by combining
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Computational analysis of turbulent flow characteristics in nanofluids containing 1-D and 2-D carbon nanomaterials: grid optimization and performance evaluation Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-09-11 Hai Tao, Mohammed Suleman Aldlemy, Raad Z. Homod, Mustafa K. A. Mohammed, Abdul Rahman Mallah, Omer A. Alawi, Shafik S. Shafik, Hussein Togun, Blanka Klimova, Hassan Alzahrani, Zaher Mundher Yaseen
1D and 2D carbon nanomaterials such as multi-walled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) were investigated numerically. The thermophysical properties of water and nanofluids ...
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Magnetohydrodynamic double diffusion natural convection of power-law Non-Newtonian Nano-Encapsulated phase change materials in a trapezoidal enclosure Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-12 Khairunnahar Suchana, Md. Mamun Molla
Purpose The present numerical investigation examines the magnetohydrodynamic (MHD) double diffusion natural convection of power-law non-Newtonian nano-encapsulated phase change materials (NEPCMs) in a trapezoidal cavity. Design/methodology/approach The governing Navier-Stokes, energy and concentration equations based on the Cartesian curvilinear coordinates are solved using the collocated grid arrangement’s
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Bright and dark optical solitons in optical metamaterials using a variety of distinct schemes for a generalized Schrodinger equation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-11 Suheil Khuri, Abdul-Majid Wazwaz
Purpose The purpose of this study is to investigate the nonlinear Schrödinger equation (NLS) incorporating spatiotemporal dispersion and other dispersive effects. The goal is to derive various soliton solutions, including bright, dark, singular, periodic and exponential solitons, to enhance the understanding of soliton propagation dynamics in nonlinear metamaterials (MMs) and contribute new findings
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Instabilities and Mixing in Inertial Confinement Fusion Annu. Rev. Fluid Mech. (IF 25.4) Pub Date : 2024-09-11 Ye Zhou, James D. Sadler, Omar A. Hurricane
By imploding fuel of hydrogen isotopes, inertial confinement fusion (ICF) aims to create conditions that mimic those in the Sun's core. This is fluid dynamics in an extreme regime, with the ultimate goal of making nuclear fusion a viable clean energy source. The fuel must be reliably and symmetrically compressed to temperatures exceeding 100 million degrees Celsius. After the best part of a century
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Fluid Mechanics of the Dead Sea Annu. Rev. Fluid Mech. (IF 25.4) Pub Date : 2024-09-11 Eckart Meiburg, Nadav G. Lensky
The environmental setting of the Dead Sea combines several aspects whose interplay creates flow phenomena and transport processes that cannot be observed anywhere else on Earth. As a terminal lake with a rapidly declining surface level, the Dead Sea has a salinity that is close to saturation, so that the buoyancy-driven flows common in lakes are coupled to precipitation and dissolution, and large amounts
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Numerical study on the behavior of a polymeric MHD nanofluid: entropy optimization and thermal analysis Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-10 Razi Khan
Purpose Analyzing and reducing entropy generation is useful for enhancing the thermodynamic performance of engineering systems. This study aims to explore how polymers and nanoparticles in the presence of Lorentz forces influence the fluid behavior and heat transfer characteristics to lessen energy loss and entropy generation. Design/methodology/approach The dispersion model is initially used to examine
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Research on the response characteristics and operation control of unsteady water transport in Huangchigou water distribution hub Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-09-04 Shanshan Li, Shuang Wu, Xinhong Wang, Guodong Li, Haichao Li, Jiali Lv, Jiancang Xie
The water transfer project has alleviated the shortage of water resources, but frequent scheduling of water distribution hubs can harm the water transmission buildings. This article is based on the...
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Supercritical fluid extraction of coumarins and flavonoids from citrus peel J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-09-05 Juan J. Mora, Henrique M. Tavares, Romina Curbelo, Eduardo Dellacassa, Eduardo Cassel, Miriam A. Apel, Gilsane L. von Poser, Rubem M.F. Vargas
The production manufacture of juices generates a large amount of waste consisting mainly of fruit peels. The peels are source of molecules such as coumarins and flavonoids. In this study, the peels of , , and were the raw material for supercritical fluid extraction. The Box-Behnken design was used to optimize the global yield in function of process variables. The chemical analysis of the extract was
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Fabrication of electromagnetic wave absorption nanocomposite foam with adjustable conductive network by supercritical carbon dioxide foaming J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-09-05 Yishen Zhao, Kun Li, Yanru Li, Xiaoli Zhang, Shixun Zhang, Xia Liao, Jingbo Chen, Chul B. Park
Polymer nanocomposite foams with high electromagnetic interference (EMI) shielding performance have become the research hotspot to reduce electromagnetic wave pollution. Herein, we prepared polyethylene/poly (vinylidene fluoride)/carbon nanotubes/FeO(PE/PVDF/FeO/CNTs) nanocomposites and nanocomposite foams by following the simple melt blending and batch foaming procedures. The co-continuous structure
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Analysis of the influence of the daily regulation of power stations on navigable flow conditions at river confluences using the LSTM model Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-09-02 Hongcheng Xue, Shihao Cui, Qian Ma, Zhongyong Li, Pengyu Zhou, Yuanyuan Li, Lingyun Xie
The daily operations of large hydropower stations on rivers induce frequent variations in downstream water levels and flow velocities, resulting in unsteady and complex hydraulic characteristics at...
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3D computational fluid dynamics analysis of natural gas separation efficiency in multiphase pumping wells with heterogeneous flow regime Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-30 Charles C. Okafor, Patrick G. Verdin
This research uses 3D Computational Fluid Dynamics (CFD) simulations to investigate the downhole Natural Gas Separation Efficiency (NGSE) for multiphase pumping wells in the heterogeneous churn flo...
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Finite element method (FEM) analysis of heat transfer by natural convection in a circular cavity containing a corrugated hollow cylinder Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-05 Abdelhak Daiz, Rachid Hidki, Redouane Fares, Zouhair Charqui
Purpose The purpose of this study is to analyze the free convection phenomena arising from a temperature disparity between a cold circular cylinder and a heated corrugated cylinder. Design/methodology/approach Numerical simulations were used to analyze the convection patterns. The inner cylinder, made of a thermally conductive solid material, was heated through its inner surface, while the space between
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Thermal radiation, Soret and Dufour effects on MHD mixed convective Maxwell hybrid nanofluid flow under porous medium: a numerical study Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-09-03 J. Jayaprakash, Vediyappan Govindan, S.S. Santra, S.S. Askar, Abdelaziz Foul, Susmay Nandi, Syed Modassir Hussain
Purpose Scientists have been conducting trials to find ways to reduce fuel consumption and enhance heat transfer rates to make heating systems more efficient and cheaper. Adding solid nanoparticles to conventional liquids may greatly improve their thermal conductivity, according to the available evidence. This study aims to examine the influence of external magnetic flux on the flow of a mixed convective
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Comparative analysis of biological potential of acerola by-product extracts obtained by hydrothermal and gas-expanded liquid extraction J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-31 Otília Mônica Alves Borges, Karina Cesca, Laís Benvenutti, Matheus Henrique Oliveira de Sousa, Neusa Fernandes de Moura, Jose David Sánchez-Martinez, Alejandro Cifuentes, Acácio A.F. Zielinski, Patrícia Poletto
The acerola non-pomace, a by-product from the juice clarification step and rich in phenolic compounds and ascorbic acid, was investigated for its biological potential through tests. Extracts were obtained using hydrothermal extraction (HT) at 121°C as well as CO-expanded ethanol (GXL) at 40°C. The GXL extract contained 159 mg/g of ascorbic acid, while the HT extract showed 70 mg/g. Catechin was found
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Numerical and experimental investigation of silo vibration of sulfur storage Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-30 A. Gholami, S. F. Hosseini, Kamel Milani Shirvan, Sadiq M. Sait, R. Ellahi
Purpose Due to the abundant use of granular materials in chemical industries, it is inevitable to store raw materials and products in bulk in silos. For this reason, much research has been carried out in the field of construction, operation and maintenance of silos. One of the important issues that must be investigated in silos is the behavior of their structure when the materials inside them are unloaded
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An integrated numerical and analytical investigation on cilia-generated MHD flow of Jeffrey fluid through a porous medium Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-30 A. Zeeshan, Hamza Javed, N. Shehzad, Sadiq M. Sait, R. Ellahi
Purpose This study aims to examine the cilia-driven flow of magnetohydrodynamics (MHD) non-Newtonian fluid through a porous medium. The Jeffrey fluid model is taken into account. The fluid motion in a two-dimensional symmetric channel emphasizes the dominance of viscous properties over inertial properties in the context of long wavelength and low Reynolds number approximations. Design/methodology/approach
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Novel localized waves and dynamics analysis for a generalized (3+1)-dimensional breaking soliton equation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-30 Jingfeng Quan, Xiaoyan Tang
Purpose This paper aims to explore new variable separation solutions for a new generalized (3 + 1)-dimensional breaking soliton equation, construct novel nonlinear excitations and discuss their dynamical behaviors that may exist in many realms such as fluid dynamics, optics and telecommunication. Design/methodology/approach By means of the multilinear variable separation approach, variable separation
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A comprehensive investigation of storm surge-induced urban flooding in Macao during Typhoon Hato in 2017 Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-30 Jinlan Guo, Shan Huang, Mingming Ge, Joseph Hun Wei Lee
A comprehensive understanding of the processes of storm surge and flooding induced by typhoons is crucial for the development of effective emergency plans and risk management strategies. This study...
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Research on aerodynamic characteristics of the pantograph on double-stack high container transportation lines Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-28 Yuhan Li, Qun Luo, Shiyu Zhao, Wenyan Qi, Zhong Huang, Guiming Mei
Purpose The purpose of this paper is to study the aerodynamic characteristics and uplift force tendencies of pantographs within the operational height span of 1,600–2,980 mm, aiming to offer valuable insights for research concerning the adaptability of pantograph-catenary systems on double-stack high container transportation lines. Design/methodology/approach Eight pantograph models were formulated
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Entropy optimization in multigrade motor oil based nanofluid: a spectral and sensitivity analysis with particle shape and dispersion effects Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-27 RamReddy Chetteti, Sweta , Pranitha Janapatla
Purpose This study aims to enhance heat transfer efficiency while minimizing friction factor and entropy generation in the flow of Nickel zinc ferrite (NiZnFe2O4) nanoparticles suspended in multigrade 20W-40 motor oil (as specified by the Society of Automotive Engineers). The investigation focuses on the effects of the melting process, nonspherical particle shapes, thermal dispersion and viscous dissipation
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Multiscale Modeling of Respiratory Transport Phenomena and Intersubject Variability Annu. Rev. Fluid Mech. (IF 25.4) Pub Date : 2024-08-27 Stavros C. Kassinos, Josué Sznitman
Our understanding of respiratory flow phenomena has been consolidated over decades with the exploration of in vitro and in silico canonical models that underscore the multiscale fluid mechanics spanning the vast airway complex. In recent years, there has been growing recognition of the significant intersubject variability characterizing the human lung morphometry that modulates underlying canonical
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An adaptive integration method for hybrid-dimensional simulations of aeroengine flight statuses by incorporating computational fluid dynamics models of turbomachinery subcomponents Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-27 Weimin Deng, Xiting Wang, Yibing Xu, Haoyang Xu
Hybrid-dimensional simulations can balance simulation accuracy and computational costs. However, applying hybrid-dimensional simulations to flight status remains challenging due to weak convergence...
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A novel graph modeling method for GNN-based hypersonic aircraft flow field reconstruction Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-26 Qiao Li, Xingchen Li, Xiaoqian Chen, Wen Yao
Detection of flow fields constitutes a critical role in the advancement and innovation of hypersonic aircraft. Under hypersonic conditions, aircraft aerodynamics manifest a multitude of complex phe...
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Data-driven wall modeling for LES involving non-equilibrium boundary layer effects Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-26 Sarath Radhakrishnan, Joan Calafell, Arnau Miró, Bernat Font, Oriol Lehmkuhl
Purpose Wall-modeled large eddy simulation (LES) is a practical tool for solving wall-bounded flows with less computational cost by avoiding the explicit resolution of the near-wall region. However, its use is limited in flows that have high non-equilibrium effects like separation or transition. This study aims to present a novel methodology of using high-fidelity data and machine learning (ML) techniques
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Reinforcement learning for cooling rate control during quenching Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-26 Elie Hachem, Abhijeet Vishwasrao, Maxime Renault, Jonathan Viquerat, P. Meliga
Purpose The premise of this research is that the coupling of reinforcement learning algorithms and computational dynamics can be used to design efficient control strategies and to improve the cooling of hot components by quenching, a process that is classically carried out based on professional experience and trial-error methods. Feasibility and relevance are assessed on various 2-D numerical experiments
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Chemometric assisted green extraction of tyrosinase inhibitor from Durio zibethinus rind for skin whitening agents in cosmetic products J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-26 Sofiyyah Ismail, Erna Normaya, Syamimi Sulfiza Shamsuri, Anwar Iqbal, Mohd Bijarimi Mat Piah, Sharifuddin Md Zain, Mohammad Norazmi Ahmad
Cosmetics typically contain artificial substances that could be harmful to people's health. Extended usage and exposure to these harmful substances are frequently linked to a number of negative impacts and illnesses. This study processed a rind, rich in natural antityrosinase properties, with a chemometric-assisted green extraction system. The TPC value was obtained at the optimum conditions (34.4 MPa
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An experimental and modeling study of propane oxidation kinetics in low temperature supercritical water J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-26 A. Mansfield, N. Sophonrat
Propane oxidation in supercritical water was investigated at iso-thermal iso-baric conditions using a batch reactor facility. Mixtures were comprised of 0.014 % propane by volume with an equivalence ratio of 0.8 and a total density of 222 mg/mL or 610 mg/mL. Reaction times ranged from 8 to 30 min for a temperature of 375ºC at 220 or 400 bar, or 400ºC at 220 bar. Major reaction products were CO and
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Designing an explainable bio-inspired model for suspended sediment load estimation: eXtreme Gradient Boosting coupled with Marine Predators Algorithm Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-20 Roozbeh Moazenzadeh, Okan Mert Katipoğlu, Ahmadreza Shateri, Hamid Nasiri, Mohammed Abdallah
This study aimed to develop an accurate and reliable model for predicting suspended sediment load (SL) in river systems, which is crucial for water resource management and environmental protection....
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Supercritical fluid impregnation of phenolic compounds from passion fruit bagasse in corn starch aerogels: Phase behavior and effect of operation mode J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-24 Erick Jarles Santos de Araujo, Arthur Jessé Oliveira Braga, José Claudio Klier Monteiro Filho, Papa Matar Ndiaye, Rodney Alexandre Ferreira Rodrigues, Julian Martínez
This work investigated the phase behavior of the system sc-CO + ethanolic extract of passion fruit bagasse (EEPFB) and the effect of operation modes on the supercritical fluid impregnation (SFI) of phenolic compounds from EEPFB in corn starch aerogels. The total reducing capacity, antioxidant capacity (FRAP and ORAC), piceatannol amount and SFI yield (%) were evaluated. Three of the four system compositions
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MLFV: a novel machine learning feature vector method to predict characteristics of turbulent heat and fluid flow Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-22 Iman Bashtani, Javad Abolfazli Esfahani
Purpose This study aims to introduce a novel machine learning feature vector (MLFV) method to bring machine learning to overcome the time-consuming computational fluid dynamics (CFD) simulations for rapidly predicting turbulent flow characteristics with acceptable accuracy. Design/methodology/approach In this method, CFD snapshots are encoded in a tensor as the input training data. Then, the MLFV learns
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Novel airfoil for improved supersonic aerodynamic performance Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-26 Zeyad M. Manaa, Naef A.A. Qasem
Purpose This study aims to validate the linear flow theory with computational fluid dynamics (CFD) simulations and to propose a novel shape for the airfoil that will improve supersonic aerodynamic performance compared to the National Advisory Committee for Aeronautics (NACA) 64a210 airfoil. Design/methodology/approach To design the new airfoil shape, this study uses a convex optimization approach to
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Application of roughness models to stationary and rotating minichannel flows Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-26 Mohammadsadegh Pahlavanzadeh, Sebastian Rulik, Włodzimierz Wróblewski, Krzysztof Rusin
Purpose The performance of a bladeless Tesla turbine is closely tied to momentum diffusion, kinetic energy transfer and wall shear stress generation on its rotating disks. The surface roughness adds complexity of flow analysis in such a domain. This paper aims to assess the effect of roughness on flow structures and the application of roughness models in flow cross sections with submillimeter height
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Heat transfer and entropy generation in viscous-joule heating MHD microchannels flow under asymmetric heating Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-22 Antar Tahiri, Haroun Ragueb, Mustafa Moussaoui, Kacem Mansouri, Djemaa Guerraiche, Khelifa Guerraiche
Purpose This paper aims to present a numerical investigation into heat transfer and entropy generation resulting from magnetohydrodynamic laminar flow through a microchannel under asymmetric boundary conditions. Furthermore, the authors consider the effects of viscous dissipation and Joule heating. Design/methodology/approach The finite difference method is used to obtain the numerical solution. Simulations
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Improve carbon dioxide emission prediction in the Asia and Oceania (OECD): nature-inspired optimisation algorithms versus conventional machine learning Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-23 Loke Kok Foong, Vojtech Blazek, Lukas Prokop, Stanislav Misak, Farruh Atamurotov, Nima Khalilpoor
This paper investigates the application of three nature-inspired optimisation algorithms – SHO, MFO, and GOA – combined with four machine learning methods – Gaussian Processes, Linear Regression, M...
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Green preparation of biodegradable poly (butylene adipate-co-terephthalate) foam modified with bio-based epoxidized cardanol using supercritical fluid foaming J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-23 Jie Yuan, Kun Xue, Xiulu Gao, Yichong Chen, Ling Zhao, Dongdong Hu
Poly (butylene adipate-co-terephthalate) (PBAT) foam is a potential alternative to conventional packaging materials. However, its wide adoption is hindered by issues such as low foaming–expansion ratios and shrinkage. A series of biodegradable epoxidized cardanol (EC)-modified PBAT foams were prepared using supercritical carbon dioxide (CO) foaming. The addition of EC enhanced the crystallisation temperature
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Impact of trailing-edge modification in stator vanes on heat transfer and the performance of gas turbine: a computational study Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-22 Thanh Dam Mai, Duy-Tan Vo, Byungwook Kim, Uideok Lee, Dokyun Kim, Hyoungsoon Lee, Jaiyoung Ryu
Despite extensive studies on the modification of airfoil profiles, most studies have primarily focused on the turbulent wave development and aerodynamic characteristics of modified airfoils. Moreov...
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Advancements in conventional and supercritical CO2 extraction of Moringa oleifera bioactives for cosmetic applications: A review J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-22 Júlia C. Kessler -, Isabel M. Martins, Yaidelin A. Manrique, Alírio E. Rodrigues, Maria Filomena Barreiro, Madalena M. Dias
L. extracts (Mo) have attracted attention as a sustainable and effective alternative to synthetic ingredients for cosmetic formulations. The unique and diverse phytochemical profile of the Mo tree enhances the quality and appeal of commercial products, as evidenced by numerous studies and patents. Supercritical carbon dioxide extraction (SFE-CO) is particularly advantageous for this purpose, offering
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Numerical investigation of the operating conditions affecting nitrogen condensation on a three-dimensional wing in the cryogenic wind tunnel Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-21 Jiaxin Hou, Junlong Xie, Xi Pan, Jianye Chen
Cryogenic wind tunnels (CWT) perform high Reynolds number aerodynamic tests in a cryogenic environment and simulate hypersonic flights. However, condensation under cryogenic conditions presents a m...
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Comparative study of Yamada-Ota and Xue models for MHD hybrid nanofluid flow past a rotating stretchable disk: stability analysis Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-21 Muhammad Yousuf Rafiq, Ayesha Sabeen, Aqeel ur Rehman, Zaheer Abbas
Purpose The hybrid nanofluid flow due to a rotating disk has numerous applications, including centrifugal pumps, paper production, polymers dying, air filtration systems, automobile cooling and solar collectors. This study aims to investigate the convective heat transport and magnetohydrodynamics (MHD) hybrid nanofluid flow past a stretchable rotating surface using the Yamada-Ota and Xue models with
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Buoyancy-driven heat transfer and entropy analysis of a hydromagnetic GO-Fe3O4/H2O hybrid nanofluid in an energy storage enclosure partially filled with non-Darcy porous medium under an oblique magnetic field Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-22 H. Thameem Basha, Hyunju Kim, Bongsoo Jang
Purpose Thermal energy storage systems use thermal energy to elevate the temperature of a storage substance, enabling the release of energy during a discharge cycle. The storage or retrieval of energy occurs through the heating or cooling of either a liquid or a solid, without undergoing a phase change, within a sensible heat storage system. In a sensible packed bed thermal energy storage system, the
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Solution of the Poisson equation by the boundary integral method Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-22 Sandipan Kumar Das
Purpose The boundary integral method (BIM) is very attractive to practicing engineers as it reduces the dimensionality of the problem by one, thereby making the procedure computationally inexpensive compared to its peers. The principal feature of this technique is the limitation of all its computations to only the boundaries of the domain. Although the procedure is well developed for the Laplace equation
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Exploring stability of Jeffrey fluids in anisotropic porous media: incorporating Soret effects and microbial systems Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-19 S. Sridhar, M. Muthtamilselvan
Purpose This paper aims to present a study on stability analysis of Jeffrey fluids in the presence of emergent chemical gradients within microbial systems of anisotropic porous media. Design/methodology/approach This study uses an effective method that combines non-dimensionalization, normal mode analysis and linear stability analysis to examine the stability of Jeffrey fluids in the presence of emergent
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Segment-based Eulerian-Lagrangian transition method for flat nozzle spray atomization simulation Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-19 Mengqi Liu, David L.S. Hung
This paper presents a novel segment-based Eulerian-Lagrangian transition method for predicting the primary and secondary breakup behavior of a flat nozzle spray. It combines the Volume of Fluid (VO...
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Experimental and numerical study on the heat transfer deterioration of supercritical nitrogen in a vertical tube J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-17 Runfeng Xiao, Jing Cao, Liang Chen, Zixin Zhang, Bin Ye, Yijie Cai, Yu Hou
Supercritical cryogenic fluids exhibit significant potential for diverse applications across various industries, including liquid air energy storage, high-temperature superconducting cables, and hypersonic vehicle engine cooling. Heat transfer deterioration (HTD) poses a substantial risk to the system safety. In this study, we constructed an experimental system and performed numerical simulations to
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Computational investigation of the relationship between landslide-related conditions and resultant dam overtopping waves Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Yunfei Mao, Mingfu Guan
The landslide-induced overtopping waves on the dam possesses the potential to release significant energy, presenting a severe hazard to infrastructures and human lives downstream. To gain insight i...
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Geometric Approaches to Lagrangian Averaging Annu. Rev. Fluid Mech. (IF 25.4) Pub Date : 2024-08-15 Andrew D. Gilbert, Jacques Vanneste
Lagrangian averaging theories, most notably the generalized Lagrangian mean (GLM) theory of Andrews and McIntyre, have been primarily developed in Euclidean space and Cartesian coordinates. We reinterpret these theories using a geometric, coordinate-free formulation. This gives central roles to the flow map, its decomposition into mean and perturbation maps, and the momentum 1-form dual to the velocity
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Artificial intelligence-based droplet size prediction for microfluidic system Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-15 Sameer Dubey, Pradeep Vishwakarma, TVS Ramarao, Satish Kumar Dubey, Sanket Goel, Arshad Javed
Purpose This study aims to introduce a vision-based model to generate droplets with auto-tuned parameters. The model can auto-adjust the inherent uncertainties and errors involved with the fabrication and operating parameters in microfluidic platform, attaining precise size and frequency of droplet generation. Design/methodology/approach The photolithography method is utilized to prepare the microfluidic
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Numerical simulation of various flow regimes in water delivery systems Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 YinYing Hu, Ling Zhou, YunJie Li, YanQing Lu, RuiLin Feng, QianXun Chen, ZiJian Xue
Transient flow frequently occurs in water delivery systems, including various flow regimes such as water hammer, free surface flow, and slug flow. Current models often oversimplify these phenomena ...
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Flow control by a hybrid use of machine learning and control theory Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-14 Takeru Ishize, Hiroshi Omichi, Koji Fukagata
Purpose Flow control has a great potential to contribute to a sustainable society through mitigation of environmental burden. However, the high dimensional and nonlinear nature of fluid flows poses challenges in designing efficient control laws using the control theory. This paper aims to propose a hybrid method (i.e. machine learning and control theory) for feedback control of fluid flows, by which
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Improving the streamflow prediction accuracy in sparse data regions: a fresh perspective on integrated hydrological-hydrodynamic and hybrid machine learning models Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Saeed Khorram, Nima Jehbez
Considering the differences and complex nonlinear relationships of the observational data, this research integrated the hydrological, hydrodynamic and time series models, including the SWAT+, MIKE2...
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Effect of wing height layout on the aerodynamic performance ofhigh-speed train Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-08-13 Xiaohui Xiong, Jiaxu Geng, Kaiwen Wang, Xinran Wang
Purpose This paper aims to investigate the effect of different wing height layouts on the aerodynamic performance and flow structure of high-speed train, in a train-wing coupling method with multiple tandem wings installed on the train roof. Design/methodology/approach The improved delayed detached eddy simulation method based on shear stress transport k- ω turbulence model has been used to conduct
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Aerodynamics effects of rear-mounted porous plate in cylindrical flow at different Reynold numbers Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Shishang Zhang, Tanghong Liu, Xiaodong Chen, Ye Zhang, Zhiqiang Kong, Qian Yu, Hongkang Liu
This paper conducts simulations to analyze the flow control characteristics of cylindrical flow over porous plates in the subcritical regime, utilising large-eddy simulation (LES) coupled with the ...
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High-pressure phase equilibrium for carbon dioxide solubility with biofuels: Experimental and thermodynamic insights in 2,5-dimethylfuran and methyl levulinate J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-13 Amal Ayad, Mojgan Ebrahiminejadhasanabadi, Wayne Michael Nelson, Latifa Negadi, Paramespri Naidoo
The solubility of carbon dioxide in two solvents, 2,5-dimethylfuran and methyl levulinate, were measured to high pressure, up to 9.1 MPa, at three different temperatures (283.15, 303.15 and 323.15) K. The new data were measured using both the isothermal synthetic technique and the variable volume synthetic method. Two methods were utilised to provide a level of data validation. The uncertainties in
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Enhancing anti-diabetic activity and reducing cytotoxicity of T. crispa extracts through sustainable approach of pressurized hot water extraction and micelle-mediated separation J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-13 Kunat Suktham, Suvimol Surassmo, Chaisak Chansriniyom, Motonobu Goto, Artiwan Shotipruk
In this study, pressurized hot water extraction (PHWE) was evaluated for the recovery of anti-diabetic borapetoside C (BPC) from stems. The maximum BPC extraction efficiency obtained at 100 ˚C, 2.5 MPa and 5.0 mL/min was considerably higher than that obtained by the conventional methods. Under optimized conditions, one-site kinetic desorption model could most accurately describe the PHWE behavior,
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Study of potassium deactivation rule in supercritical water gasification of coal with K2CO3 as catalyst J. Supercrit. Fluids (IF 3.4) Pub Date : 2024-08-12 Chenchen Zhou, Hui Jin, Zhiwei Ge, Liejin Guo
KCO has a good catalytic effect in supercritical water gasification (SCWG) of coal. However, researchers have mainly focused on the effects of coal gasification, while the potassium mass transfer process has rarely been studied. Herein, the distribution pattern of potassium during the SCWG of coal and the factors influencing potassium deactivation were experimentally obtained. Through the detection
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Non-similar analysis of two-phase hybrid nano-fluid flow with Cattaneo-Christov heat flux model: a computational study Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-06 Faisal Shah, D. Zhang, G. Linlin
The purpose of this research elaborates the behaviour of the two-phase hybrid nano-fluid flow of viscous fluid through the stretching sheet. Impacts of heat transfer, for MHD two-dimensional steady...