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Modelling of the equilibrium of supercritical CO2 + lavender essential oil with Aspen Plus® J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-15 E. Cruz Sánchez-Alarcos, M.T. Garcia, I. Gracia, J.F. Rodriguez, J.M Garcia-Vargas
This study describes the procedure to calculate the equilibrium data of supercritical CO extraction of lavender essential oil (LEO) by using the commercial Aspen Plus® simulator and RK-Aspen thermodynamic package. From the experimental and bibliographic data, properties of pure compounds and the binary interaction parameters could be determined. A plant was also designed to calculate the solubility
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Multi-objective design optimization of a transonic axial fan stage using sparse active subspaces Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-12 Richard Amankwa Adjei, Chengwei Fan
In this paper, a multi-objective optimization strategy for efficient design of turbomachinery blades using sparse active subspaces is implemented for a turbofan stage design. The proposed strategy ...
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Dual-objective optimization strategy of self-adaptive transient pressure controller in water delivery engineering Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-14 Boran Zhang, Wuyi Wan, Yuhang Wang, Qihua Ran, Xiaoyi Chen, Yue Fang, Saiyu Yuan, Huiming Zhang
Controlling pressure impact of water hammer is an important guarantee for safe and stable running of pipeline systems. Previously, we proposed a spring self-adaptive auxiliary control (SAC) system ...
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The influence of river discharge on energy transport in estuaries and its implication for the equilibrium bed profile Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-12 Min Zhang, Bo Li, Tianyi Xie, Ian Townend, Tongtiegang Zhao, Huayang Cai
In this paper, we revisit the classical energy transport equation for pure tidal flows in estuaries by including the effects of residual water level and freshwater discharge. Starting from the one-...
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Viscosity measurement and correlation for dense fluid mixture of carbon dioxide and ethanol at 313–343 K and 15–30 MPa J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-13 Norihiro Onodera, Toshitaka Funazukuri
The viscosity of dense fluid mixtures of carbon dioxide and ethanol was determined from the pressure drop between the inlet and outlet of a packed bed using the Ergun equation at temperatures from 313.2K to 343.2K and pressures from 15MPa to 30MPa over the entire range of ethanol composition. The values for the fluid mixtures decreased with increasing temperature and increased with increasing pressure
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Supercritical CO2 Extraction of Carotenoids From High Andean Forest Bee Pollen J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-12 Natalia Viloria-Pérez, Lady Viviana Camargo-Ovalle, Luis I. Rodríguez-Varela, Consuelo Díaz-Moreno, Héctor Suárez-Mahecha
An oily bee pollen extract was obtained using the supercritical fluid technique (SFE) using CO2 as a solvent and conditions of pressure: 28MPa, temperature: 60°C, gas flow: 5L/min, and duration: 6h. Initially, pollen samples were collected from different municipalities of Colombia, selected, and analyzed according to the content of total carotenoids (CCT) and yield of the extraction process. The results
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A strategy to compute critical surfaces in highly asymmetrical ternary systems J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-12 Pisoni G.O., Cismondi M., Zabaloy M.S.
This work shows that predicting, using a model, the topology and even the existence range of the critical behavior in an asymmetrical ternary system, is practically impossible without a systematic strategy to build through computations the ternary critical surface (T-CS). For this purpose, it is necessary to have robust calculation procedures to compute such surfaces. In this work, a calculation strategy
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A novel conceptual design approach for autonomous underwater helicopter based on multidisciplinary collaborative optimization Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-11 Yuan-Jie Chen, Haocai Huang
Autonomous underwater helicopters (AUHs) are complex electromechanical systems consisting of multiple interconnected sub-disciplines, posing a significant challenge for traditional sequential desig...
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Bench-scale supercritical and near-supercritical water oxidation assays to treat Propylene Oxide-Styrene Monomer (POSM) wastewater J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-11 M.A. Cardete, L.R. Kritzinger, D. Breakey, D. McGarry, C. Peña, A. Orejas
Supercritical Water Oxidation is a promising technology to deal with the phenolic-benzoic nature of the wastewater from Propylene Oxide-Styrene Monomer processes. To assess its feasibility to meet discharge regulations for a continuous process, lab-scale assays were conducted with real wastewater. After a screening to maximize Chemical Oxygen Demand (COD) removal efficiency, a supercritical, four-hour
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Molecular dynamics simulation of polycyclic aromatic hydrocarbons solvation behavior in supercritical carbon dioxide under different pressure and temperature J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-09 Junying Wang, Meixin Guan, Jie Zhang, Hui Jin
In this work, the solvation behavior of polycyclic aromatic hydrocarbons (PAHs) in supercritical carbon dioxide (sCO) was investigated by molecular dynamics simulation. The effects of changing temperature and pressure on the solvation behavior were studied. In addition, the value of the interaction binding energy of PAHs-sCO and the radial distribution function at various conditions was calculated
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Numerical simulation investigation of the mechanism of lacquer curtain formation in curtain coating Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-06 Jie-min Zhan, Kai Lin, Yi-hua Li, Wen-qing Hu
To study the key factors on integrated curtain formation and breakup in curtain coating production process, we used the numerical simulation method to analyze the various stages of the curtains fro...
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Heat transfer analysis of magnetohydrodynamics peristaltic fluid with inhomogeneous solid particles and variable thermal conductivity through curved passageway Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-03-12 Atifa Kanwal, Ambreen A. Khan, Sadiq M. Sait, R. Ellahi
Purpose The particle distribution in a fluid is mostly not homogeneous. The inhomogeneous dispersion of solid particles affects the velocity profile as well as the heat transfer of fluid. This study aims to highlight the effects of varying density of particles in a fluid. The fluid flows through a wavy curved passage under an applied magnetic field. Heat transfer is discussed with variable thermal
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Impact of memory-dependent heat transfer on Rayleigh waves propagation in nonlocal piezo-thermo-elastic medium with voids Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-03-11 Vipin Gupta, Barak M.S., Soumik Das
Purpose This paper addresses a significant research gap in the study of Rayleigh surface wave propagation within a piezoelectric medium characterized by piezoelectric properties, thermal effects and voids. Previous research has often overlooked the crucial aspects related to voids. This study aims to provide analytical solutions for Rayleigh waves propagating through a medium consisting of a nonlocal
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Simulation of phase change during the freezing of unsaturated porous media by using a coupled lattice Boltzmann model Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-03-07 Fei Xu, Zheng Wang, Wei Hu, Caihao Yang, Xiaolong Li, Yaning Zhang, Bingxi Li, Gongnan Xie
Purpose The purpose of this paper is to develop a coupled lattice Boltzmann model for the simulation of the freezing process in unsaturated porous media. Design/methodology/approach In the developed model, the porous structure with complexity and disorder was generated by using a stochastic growth method, and then the Shan-Chen multiphase model and enthalpy-based phase change model were coupled by
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Polypropylene Re-entrant Foams with High Energy Absorption Realized by Vacuum-counter pressure-assisted Supercritical CO2 Foaming J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-03 Weipeng Zhong, Jiashun Hu, Hao-Yang Mi, Binbin Dong, Chuntai Liu, Changyu Shen
Manipulating the cellular microstructure is an important means to alter the mechanical properties and expand the application of polymer foams. Herein, a vacuum-counter pressure-assisted supercritical CO foaming (V-CP foaming) process was developed to fabricate polypropylene (PP) foams with closed re-entrant cell structures. The re-entrant cellular structure was realized by the combined effect of the
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Two-phase flow investigation of sewage pumps with different tip clearance via computational fluid dynamics and multi-factor ANOVA Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-01 Yang Yang, Hui Wang, Qixiang Hu, Leilei Ji, Zhaoming He, Weidong Shi, Xiangyu Song, Ling Zhou
Sewage pumps are widely utilized in various applications, including municipal wastewater treatment plants, industrial processes, and residential sewage systems. These pumps are specifically designe...
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Development of strategies for continuous desalination of weak black liquor based on phase-behaviour analysis J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-03-02 Nicholas I. Canabarro, Darius J. Yeadon, Maximilian Wörner, Ursel Hornung, Frédéric Vogel, David Baudouin
This paper investigated different strategies to prevent salt deposition during weak black liquor (WBL) desalination under hydrothermal liquefaction conditions based on phase behaviour analysis. Phase equilibria of model salt solutions replicating the WBL composition were studied by high-pressure differential scanning calorimetry (HP-DSC) and different strategies to induce the Type 1 salt behaviour
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Adjoined ISPH method and artificial intelligence for thermal radiation on double diffusion inside a porous L-shaped cavity with fins Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-03-04 Hillal M. Elshehabey, Andaç Batur Çolak, Abdelraheem Aly
Purpose The purpose of this study is to adapt the incompressible smoothed particle hydrodynamics (ISPH) method with artificial intelligence to manage the physical problem of double diffusion inside a porous L-shaped cavity including two fins. Design/methodology/approach The ISPH method solves the nondimensional governing equations of a physical model. The ISPH simulations are attained at different
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Forecasting of energy-related carbon dioxide emission using ANN combined with hybrid metaheuristic optimization algorithms Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-29 Hossein Moayedi, Azfarizal Mukhtar, Nidhal Ben Khedher, Isam Elbadawi, Mouldi Ben Amara, Quynh TT, Nima Khalilpoor
Energy-related CO2 emissions are one of the biggest concerns facing urban design today, increasing rapidly as cities grow. This study uses as inputs the GDP of the G8 nations (from 1990 to 2016) de...
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Foaming behaviors of poly (butylene adipate-co-terephthalate) with methyl methacrylate-co-glycidyl methacrylate as chain extender J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-28 Zicheng Wang, Ruijia Wang, Shenzhi Yan, Shulin Sun
As an important biodegradable polymer, how to achieve stable cell morphology and high cell density in the foam of poly(butylene adipate-co-terephthalate) (PBAT) is challenging due to its low mechanical and melt strength. To address this issue, an innovative methyl methacrylate-co-glycidyl methacrylate (MG) copolymer was designed and used as a chain extender due to its strong affinity with carbon dioxide
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Research on precise and standardized numerical simulation strategy for vehicle aerodynamics Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-29 Zhen Chen, Jing Liu, Chao Ma, Huawei Wu, Zhi Li
Purpose The purpose of this study is to propose a precise and standardized strategy for numerically simulating vehicle aerodynamics. Design/methodology/approach Error sources in computational fluid dynamics were analyzed. Additionally, controllable experiential and discretization errors, which significantly influence the calculated results, are expounded upon. Considering the airflow mechanism around
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Numerical investigation of three-dimensional natural convection heat transfer on corrugated plates of variable height Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-28 Sílvio Aparecido Verdério Júnior, Pedro J. Coelho, Vicente Luiz Scalon
Purpose The purpose of this study is to numerically investigate the geometric influence of different corrugation profiles (rectangular, trapezoidal and triangular) of varying heights on the flow and the natural convection heat transfer process over isothermal plates. Design/methodology/approach This work is an extension and finalization of previous studies of the leading author. The numerical methodology
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Thermal performance improvement in wavy microchannels using secondary channels Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-27 Karthikeyan Paramanandam, Venkatachalapathy S, Balamurugan Srinivasan, Nanda Kishore P V R
Purpose This study aims to minimize the pressure drop across wavy microchannels using secondary branches without compromising its capacity to transfer the heat. The impact of secondary flows on the pressure drop and heat transfer capabilities at different Reynolds numbers are investigated numerically for different wavy microchannels. Finally, different channels are evaluated using performance evaluation
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Aerodynamic performance increase over an A320 morphing wing in transonic regime by numerical simulation at high Reynolds number Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-27 Jacques Abou Khalil, César Jiménez Navarro, Rami El Jeaid, Abderahmane Marouf, Rajaa El Akoury, Yannick Hoarau, Jean-François Rouchon, Marianna Braza
Purpose This study aims to investigate the morphing concepts able to manipulate the dynamics of the downstream unsteadiness in the separated shear layers and, in the wake, be able to modify the upstream shock–boundary layer interaction (SBLI) around an A320 morphing prototype to control these instabilities, with emphasis to the attenuation or even suppression of the transonic buffet. The modification
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Leading elliptic relationship for supercritical fluids in the Widom region J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-24 Donát M. Takács, Tamás Fülöp, Attila R. Imre
It is well-known that the behaviour of supercritical fluids near the critical point changes considerably in the region around the Widom lines. We have found, for pure fluids, that the relationship between the thermal expansion coefficient and the isothermal compressibility is not only highly nonlinear in this region but in a certain temperature range can also be approximated well at constant pressure
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Performance prediction and optimization of hydrogenation feed pump based on particle swarm optimization – least squares support vector regression surrogate model Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-22 Yanpi Lin, Liang Li, Shunyin Yang, Xiaoguang Chen, Xiaojun Li, Zuchao Zhu
Due to high power consumption and low energy efficiency of the hydrogenation feed multistage pump, conducting structural optimization design and reducing energy losses for this pump is necessary. I...
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Swash-flow induced forces on human body standing on a smooth and impermeable slope: A numerical study with experimental validations Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-22 Deping Cao, Zaibin Lin, Jing Yuan, Weikai Tan, Hao Chen
Swash flow poses a significant hazard to pedestrians standing on the slope of the seawall. Unlike the forces of overtopping flow or open channel flow on the human body, which have been studied befo...
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Tracking contaminants in the aqueous effluent during supercritical water gasification and oxidation of swine manure in the flow mode J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-22 Oxana N. Fedyaeva, Sergey V. Morozov, Anatoly A. Vostrikov
Biomass waste processing is an area of great interest due to its potential for reducing environmental impact and recovering resources. The present work investigates for the first time the composition of products resulting from supercritical water (SCW) gasification and oxidation of swine manure (SM) continuously fed into a tubular reactor at a temperature gradient along its vertical axis of 390–600
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Under-deposit corrosion of Cr-coated Ni-based alloys in supercritical water oxidation environment at 500 °C J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-17 Jianqiao Yang, Yining Ding, Fen Zhao, Shuzhong Wang, Yanhui Li, Donghai Xu
In this study, a Cr coating was fabricated on Ni-based alloys to prevent under-deposit corrosion. The effect of salt deposition on the structural integrity of the Cr coating in SCW environment with/without oxygen was investigated. Results show that the Cr coating kept its integrity after exposure in SCW environment, successfully avoided the metallic ions leaching from Ni-based alloys. The structure
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Computational Study of the Solvation Effect of Supercritical Water on o-Phthalic Acid Decarboxylation by Varying the Solvent Dielectric Constant J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-17 Anna Legaspi, Michiya Fujita, Yoshito Oshima, Makoto Akizuki
This study investigates the solvation effect on the decarboxylation of -phthalic acid using quantum calculations with a continuum solvation model with varying dielectric constants. Two mechanisms were considered: with and without a catalytic water molecule. The latter had a lower reaction barrier. Increasing the dielectric constant facilitates the hydrogen transfer but impedes C–C bond breaking in
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Propulsion curve analysis and optimisation of biomimetic pectoral fin with three degree of freedom based on multi-layer perception Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-15 Zonggang Li, Bin Li, Guangqing Xia, Huifeng Kang
This paper aims to improve the swimming efficiency of biomimetic robotic fish by optimising its propulsion curve with three degree of freedom (DOF), in which the key is to minimise the resistance d...
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A new exploration on passive control of transonic flow over a backward-facing step Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-19 Xiang Shen, Kai Zeng, Liming Yang, Chengyong Zhu, Laurent Dala
Purpose This paper aims to study passive control techniques for transonic flow over a backward-facing step (BFS) using square-lobed trailing edges. The study investigates the efficacy of upward and downward lobe patterns, different lobe widths and deflection angles on flow separation, aiming for a deeper understanding of the flow physics behind the passive flow control system. Design/methodology/approach
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Analysis of open channel flow with various layered vegetation using CFD, considering different near-wall treatment methods Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-20 Rahim Şibil
Purpose The purpose of this paper is to investigate the impact of near-wall treatment approaches, which are crucial parameters in predicting the flow characteristics of open channels, and the influence of different vegetation covers in different layers. Design/methodology/approach Ansys Fluent, a computational fluid dynamics software, was used to calculate the flow and turbulence characteristics using
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Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-20 Ebrahem A. Algehyne
Purpose In recent times, there has been a growing interest in buoyancy-induced heat transfer within confined enclosures due to its frequent occurrence in heat transfer processes across diverse engineering disciplines, including electronic cooling, solar technologies, nuclear reactor systems, heat exchangers and energy storage systems. Moreover, the reduction of entropy generation holds significant
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Oscillatory flow driven microdroplet breakup dynamics and microparticle formation in LMPA-water two phase flow system Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-15 Yanhong Guo, Yong Liu, Tuo Hou, Xinyu Zhang, Jiayun Gao, Jun He, Chengbo Wang, Jing Wang, Qingsen Zhao, Yue Chan, Yong Ren
This study presents a mathematical modeling and numerical investigation of oscillatory flow induced microdroplet breakup in low melting point alloy (LMPA)-in-water two-phase flow system in a microc...
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Porous structures design in liquid silicone rubber foams through CO2 controlled molecular crosslinking J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-10 Zuoze Fan, Wanyu Tang, Lei Zhang, Fangfang Zou, Shaozhe Shi, Guangxian Li, Xia Liao
During CO foaming, molecular crosslinking plays an important role on cell structure of rubber foam. In this work, effects of CO on crosslinking reaction of liquid silicone rubber (LSR) were investigated according to viscoelasticity and reaction activation energy. It was found that CO facilitates formation of local primary crosslinking structure in LSR, while inhibiting creation of crosslinking network
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Evaluating shallow mixing layer in partially-distributed canopy flows using DA-LES: bed friction, water shallowness and canopy denseness Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-05 Zi-Rui Wang, Si-Jin Zhang, Yu-Xuan Jiang, Zhi-Dong Yao, Xu-Feng Yan
Shallow mixing layers developed in partially-distributed canopy flows (PCFs) are important for water conveyance, sediment transport and solute dispersion. In this paper, we address the response of ...
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Optimization of supercritical fluid extraction of bioactive compounds from Ammodaucus leucotrichus fruits by using multivariate response surface methodology J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-07 Norelhouda Abderrezag, Felipe Sanchez Bragagnolo, Ouahida Louaer, Abdeslam-Hassen Meniai, Alejandro Cifuentes, Elena Ibáñez, Jose A. Mendiola
This study explored supercritical fluid extraction (SFE) of bioactive molecules from seeds, a little-known source of potent bioactive compounds. Response surface methodology assessed extraction parameters (pressure, temperature, and ethanol co-solvent) and their effects on global yield, total phenolic compound (TPC), total carbohydrate content (TCC), and anti-Alzheimer activity. Optimization via a
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Investigation on unstable flow characteristics and energy dissipation in Pelton turbine Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-01 Wenrui Fan, Longgang Sun, Pengcheng Guo
The internal flow scale of a Pelton turbine is variable, and the interaction between the jet and the bucket has strong transient characteristics, resulting in an incomplete understanding of its int...
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An elementary model for an advancing autoignition front in laminar reactive co-flow jets injected into supercritical water J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-06 Amanda Matson, Michael C. Hicks, Uday G. Hegde, Peter V. Gordon
In this paper we formulate and analyze an elementary model for the propagation of advancing autoignition fronts in reactive co-flow fuel/oxidizer jets injected into an aqueous environment at pressures exceeding the critical point of water. This work is motivated by the experimental studies of autoignition of hydrothermal flames performed at the high pressure laboratory of NASA Glenn Research Center
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Solubility and extraction studies on diamylhydrogen phosphonate in supercritical carbon dioxide J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-06 B. Sivaramakrishna, M. Darshana, P. Rajani, K.C. Pitchaiah, G. Chandrasekhar, V.K. Madhavan Kutty, G. Srinivasa Rao, C.V.S.Brahammanada Rao, N. Sivaraman
Dialkylhydrogen phosphonates have emerged as potential extractants for extraction and recovery of actinide species from different environments. The applicability of diamylhydrogen phosphonate (DAHP) as a ligand in supercritical medium was evaluated by measuring its solubility in supercritical carbon dioxide. The solubility behaviour is examined at 313K to 343K, with pressure ranging from 10MPa to 20MPa
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Energy distribution and chaotic pressure pulsation analysis of vortex ropes in Francis-99 Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-02 Puxi Li, Jiahao Lu, Ran Tao, Ruofu Xiao, Bin Ji, Fujun Wang
Francis turbines, essential for stability in diverse operating conditions and variable-speed scenarios, encounter efficiency-compromising vortex rope formations in the draft tube, leading to substa...
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Entropy generation in a partially heated hybrid nanofluid saturated wavy porous cavity Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-05 Prabir Barman, Srinivasa Rao Pentyala, B.V. Rathish Kumar
Purpose A porous cavity flow field generates entropy owing to energy and momentum exchange within the fluid and at solid barriers. The heat transport and viscosity effects on fluid and solid walls irreversibly generate entropy. This numerical study aims to investigate convective heat transfer together with entropy generation in a partially heated wavy porous cavity filled with a hybrid nanofluid.
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Impact of cosolvent concentration of ternary and binary solution for biodegradable poly(D,L-lactic acid) under supercritical solvents J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-05 Siddhant Kumar Prasad, Uma Sankar Behera, Chang-Woo Lee, Hun-Soo Byun
This study provides experimental cloud point data for poly(D,L-lactic acid) (PDLLA) polymer and supercritical solvent and cosolvent mixtures at ~333K to ~424K and pressures up to ~157MPa for PDLLA. Various solvents investigated include CO, DME, CHF, CHF, CF, CH, c-CF, and F-22. CO is a preferred solvent due to non-toxic, non-flammability, low cost but the results indicate low PDLLA solubility in CO
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Energy management of a concentrated photovoltaic−thermal unit utilizing nanofluid jet impingement in existence of thermoelectric module Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-02 M. Sheikholeslami, Z. Khalili
To generate a concentrated photovoltaic–thermal (CPVT) unit system, linear Fresnel concentrators have been attached to a PV unit and a thermoelectric generator (TEG) has been combined in this work ...
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Machine-learning and CFD based optimization and comprehensive experimental study on diagonal flow fan for energy conservation and efficiency enhancement Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-02 Shuiqing Zhou, Yu Luo, Zijian Mao, Laifa Lu, Weiping Feng
The diagonal flow fan, known for its innovative airflow guiding technique, presents a dual advantage of heightened efficiency and reduced noise levels. Despite garnering attention in energy product...
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Vapor-liquid equilibrium measurement and critical line prediction for carbon dioxide (CO2) + fluoroethane (R161) binary mixtures J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-02-03 Zirui Wu, Rui Sun, Lingfeng Shi, Peng Hu, Hua Tian, Xuan Wang, Gequn Shu
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Instantaneous 2D extreme wind speed prediction using the novel Wind Gust Prediction Net based on purely convolutional neural mechanism Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-01-31 Zeguo Zhang, Jianchuan Yin
Accurate prediction of spatial–temporal extreme wind gust is vital for the wind farm dynamic regulation, the floating wind turbine deployment and its early warning. Deep-learning approaches have be...
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MHD unsteady flow of carbon nanotubes over nonlinear radiative surface with anisotropic slip conditions: computational analysis of irreversibility for Yamada-Ota model Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-02-01 Zafar Mahmood, Khadija Rafique, Adnan, Umar Khan, Taseer Muhammad, Ahmed M. Hassan
In this study, the Yamada-Ota model is used to look for an analysis of irreversibility when there is nonsymmetric magnetohydrodynamic flow inside a nanoliquid made of carbon nanotubes (CNTs) across...
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Numerical modelling and experimental validation of dripping, jetting and whipping modes of gas dynamic virtual nozzle Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-05 Krištof Kovačič, Jurij Gregorc, Božidar Šarler
Purpose This study aims to develop an experimentally validated three-dimensional numerical model for predicting different flow patterns produced with a gas dynamic virtual nozzle (GDVN). Design/methodology/approach The physical model is posed in the mixture formulation and copes with the unsteady, incompressible, isothermal, Newtonian, low turbulent two-phase flow. The computational fluid dynamics
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Entropy generation for thermo-magnetic fractional order convective flow in complex porous enclosures: a numerical study Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-02-02 Deepika Parmar, S.V.S.S.N.V.G. Krishna Murthy, B.V. Rathish Kumar, Sumant Kumar
Purpose This study aims to analyze the impact of fractional derivatives on heat transfer and entropy generation during transient free convection inside various complex porous enclosures, such as triangle, L-shape and square-containing wavy surfaces. These porous enclosures are saturated with Cu-water nanofluid and subjected to the influence of a uniform magnetic field. Design/methodology/approach In
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A Hamiltonian equation produces a variety of Painlevé integrable equations: solutions of distinct physical structures Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-01-30 Abdul-Majid Wazwaz
Purpose The purpose of this paper is to investigate a variety of Painlevé integrable equations derived from a Hamiltonian equation. Design/methodology/approach The newly developed Painlevé integrable equations have been handled by using Hirota’s direct method. The authors obtain multiple soliton solutions and other kinds of solutions for these six models. Findings The developed Hamiltonian models exhibit
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Kinetic modeling of oil shale upgrading at sub- and supercritical water conditions using Ni- and Fe-based oil-soluble catalysts J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-01-26 Guillermo Félix, Richard Djimasbe, Mikhail A. Varfolomeev, Ameen Al-Muntaser, Alexis Tirado, Muneer Suwaid, Konstantin Y. Prochukhan, Andrey S. Bochkov, Konstantin N. Frolov, Oleg V. Zhdaneev, Eduard A. Galiullin, Insaf N. Shamanov, Evgeniya V. Morozova, Bulat I. Gareev, Jorge Ancheyta
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Continuous production of highly bioavailable lycopene nanodispersions via subcritical ethanol extraction and in-line mixing J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-01-26 Masaki Honda, Yuichi Murakami, Hirotoshi Sumida, Kentaro Takahama, Kazuya Murakami, Yuji Muramoto, Motonobu Goto
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Effects of velocity, thermal and concentration slips on the entropy generation of nanofluid over an inclined sheet Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-01-29 Ashok K. Barik, Swetapadma Rout, Jnana Ranjan Senapati, M.M. Awad
Purpose This paper aims at studying numerically the entropy generation of nanofluid flowing over an inclined sheet in the presence of external magnetic field, heat source/sink, chemical reaction along with slip boundary conditions imposed on an impermeable wall. Design/methodology/approach A suitable similarity transformation technique has been used to convert the coupled nonlinear partial differential
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Solvothermal synthesis of porous FeOx–CeO2−y composite spheres with high mixing homogeneity J. Supercrit. Fluids (IF 3.9) Pub Date : 2024-01-29 Ayano Taniguchi, Yusuke Hiraguri, Reo Minakuchi, Honoka Kajimoto, Asuka Shima, Masataka Ohtani, Kazuya Kobiro
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Explainable machine learning models for estimating daily dissolved oxygen concentration of the Tualatin River Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-01-23 Shuguang Li, Sultan Noman Qasem, Shahab S. Band, Rasoul Ameri, Hao-Ting Pai, Saeid Mehdizadeh
Monitoring the quality of river water is of fundamental importance and needs to be taken into consideration when it comes to the research into the hydrological field. In this context, the concentra...
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Scaling and modeling of the heat transfer across the free surface of a thermocapillary liquid bridge Int. J. Numer. Methods Heat Fluid Flow (IF 4.2) Pub Date : 2024-01-29 Francesco Romanò, Mario Stojanović, Hendrik C. Kuhlmann
Purpose This paper aims to derive a reduced-order model for the heat transfer across the interface between a millimetric thermocapillary liquid bridge from silicone oil and the surrounding ambient gas. Design/methodology/approach Numerical solutions for the two-fluid model are computed covering a wide parametric space, making a total of 2,800 numerical flow simulations. Based on the computed data,