Heating a cold semi-annulus wall by MHD natural convetion with nanofluid

Article Construction & Building Technology

A novel approach for pavement texture characterisation using 2D-wavelet decomposition

Yuchuan Du et al.

Summary: A 2D-wavelet approach is proposed in this paper to characterize pavement texture, which can effectively recognize aggregates, predict gradation distribution, and evaluate road performances.

INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING (2022)

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Article Mathematics, Applied

A generalized differential quadrature algorithm for simulating magnetohydrodynamic peristaltic flow of blood-based nanofluid containing magnetite nanoparticles: A physiological application

Muhammad Usman Ashraf et al.

Summary: This article numerically examines the peristaltic flow of blood-based nanofluid using the generalized differential quadrature method. It adopts the Casson constitutive model to depict flow characteristics in a uniform wavy tube, and considers the non-Newtonian nature and heat transfer feature of the nanofluidic medium. The study successfully models the flow under realistic assumptions, and explores the effects of adding magnetite nanoparticles in the biofluidic medium.

NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS (2022)

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Article Thermodynamics

Thermal radiation and surface roughness effects on the thermo-magneto-hydrodynamic stability of alumina-copper oxide hybrid nanofluids utilizing the generalized Buongiorno's nanofluid model

Abderrahim Wakif et al.

Summary: This study investigated the effects of thermal radiation and surface roughness on the dynamics of water conveying alumina and copper oxide nanoparticles. It found that increasing Lorentz forces, thermal radiation, and surface roughness enhanced the appearance of convection cells, while stability decreased with higher volumetric fraction and diameter of nanomaterials. Substituting alumina nanoparticles with copper oxide nanoparticles significantly stabilized the hybrid nanofluidic medium.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY (2021)

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Article Thermodynamics

Numerical spectral examination of EMHD mixed convective flow of second-grade nanofluid towards a vertical Riga plate using an advanced version of the revised Buongiorno's nanofluid model

Ghulam Rasool et al.

Summary: This study investigates the impact of the Cattaneo-Christov model and convective boundary on second-grade nanofluid flow, as well as the influence of Lorentz forces generated by a Riga pattern. The research finds variations in horizontal movement, thermal distribution, and concentration distribution of nanoparticles for different fluid parameters. The results are obtained using a spectral local linearization method and reveal enhancements in horizontal movement for elevated modified Hartman factor values, as well as reductions in thermal state and nanoparticle concentration for incremental relaxation time parameters.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY (2021)

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Article Thermodynamics

Entropic analysis of a double helical tube heat exchanger including circular depressions on both inner and outer tube

Yan Cao et al.

Summary: This research provides an entropic analysis of a double helical tube heat exchanger with circular depressions on both inner and outer tubes, using experimentally validated 3D numerical simulation. The study investigates the entropic characteristics of four different cases, showing that creating circular depressions on both tubes significantly improves heat transfer but also increases entropy generation. Case d, where the outer tube depressions are located between continuous inner tube depressions, demonstrates the highest thermal performance and entropy generation.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Thermodynamics

Significance of variability in magnetic field strength and heat source on the radiative-convective motion of sodium alginate-based nanofluid within a Darcy-Brinkman porous structure bounded vertically by an irregular slender surface

Metib Alghamdi et al.

Summary: Numerical examination of enhanced MHD convective Casson bi-phasic flows of sodium alginate-based nanofluids reveals that wall heat transfer rate and frictional effect are influenced by nanoparticle loading and heat source parameter values. Magnetic parameter exhibits a reverse trend compared to other engineering quantities.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Green & Sustainable Science & Technology

A complete energetic and exergetic analysis of a solar powered trigeneration system with two novel organic Rankine cycle (ORC) configurations

Shirko Jafary et al.

Summary: This study compares two solar powered trigeneration systems from energetic and exergetic viewpoints. The system with ORC-IHE configuration demonstrated higher energy and exergy efficiency compared to the RORC configuration, with energy efficiencies of 93.35% and 86.66%, and exergy efficiencies of 12.69% and 6.641%, respectively.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Thermodynamics

Economic and environmental assessment using emergy of a geothermal power plant

Mohammad Jalili et al.

Summary: Environmental and economic factors play vital roles in thermodynamic systems design, and exergoeconomic and exergoenvironmental analyses are utilized to assess energy production systems. By using the concept of emergy, this research aims to improve understanding of economic and environmental impacts. The application of emergy-based exergoeconomic and exergoenvironmental balances provides insights for a combined flash and binary geothermal system, showing the need for strategies to reduce destruction emergy.

ENERGY CONVERSION AND MANAGEMENT (2021)

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Article Physics, Multidisciplinary

Dynamics of radiative-reactive Walters-b fluid due to mixed convection conveying gyrotactic microorganisms, tiny particles experience haphazard motion, thermo-migration, and Lorentz force

A. Wakif et al.

Summary: This passage discusses the significance of the dynamics of a mixture of polymethyl methacrylate and pyridine under certain conditions, utilizing mathematical models to analyze fluid dynamics properties and draw conclusions on heat transfer rate, microorganism flux, and temperature distribution enhancements.

PHYSICA SCRIPTA (2021)

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Article Energy & Fuels

Thermal, frictional and exergetic analysis of non-parallel configurations for plate heat exchangers

Yusuf A. Al-Turki et al.

Summary: This study focuses on non-parallel configurations of plate heat exchangers and finds that they are more thermally efficient compared to parallel configurations, providing higher Nusselt numbers and thermal performance factors. The optimal configuration involves hot fluid flowing through the converge channel and cold fluid flowing through the divergent channel.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2021)

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Article Engineering, Manufacturing

Semiempirical heat flux model of hard-brittle bone material in ductile microgrinding

Min Yang et al.

Summary: A semiempirical heat flux theoretical model based on the dynamic grinding force of hard-brittle bone ductile microgrinding is proposed to solve the calculation error problem in bone microgrinding temperature field. Experimental results show high consistency between theoretical calculations and actual measurements, with an average error of less than 7.7%. This model allows for precise control of temperature distribution during hard-brittle bone microgrinding processes through mechanical processing theory.

JOURNAL OF MANUFACTURING PROCESSES (2021)

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Article Engineering, Mechanical

MHD natural convection and entropy generation of non-Newtonian ferrofluid in a wavy enclosure

Sadia Afsana et al.

Summary: The study investigates 2D laminar MHD natural convection flow of non-Newtonian ferrofluid in a wavy enclosure, focusing on heat transfer, streamlines, isotherms, and entropy generation. Numerical simulations reveal differences in behavior and properties of different fluid types under magnetic field influence, with significant effects on heat transfer and entropy generation.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2021)

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Article Biology

Fast virtual coiling algorithm for intracranial aneurysms using pre-shape path planning

Palak Patel et al.

Summary: The study introduces a fast virtual coiling algorithm called P3, which accurately predicts and improves the treatment outcome of endovascular coiling of intracranial aneurysms by simulating patient-specific coil deployment.

COMPUTERS IN BIOLOGY AND MEDICINE (2021)

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Article Thermodynamics

Numerical investigation on natural convection of Al2O3/water nanofluid with variable properties in an annular enclosure under magnetic field

Farid Berrahil et al.

Summary: Numerical investigation of the natural convection of Al2O3-water nanofluid was conducted under different conditions, revealing the importance of nanoparticle size in evaluating nanofluid properties. The study showed variations in Nu over line i under different parameters, such as nanoparticle volume fraction and magnetic field strength.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Chemistry, Multidisciplinary

PEM fuel cell cathode-side flow field design optimization based on multi-criteria analysis of liquid-slug dynamics

Yan Cao et al.

Summary: The study aims to improve the efficiency of GDL clearance and liquid residence time by optimizing the geometrical shape of gas channels. The results show that gas channels with a triangular cross-section perform the best in reducing ACR and increasing stable two-phase pressure drop, with a contact angle of 120 degrees recommended for optimal fuel cell performance.

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY (2021)

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Article Mechanics

Effects of Brownian motions and thermophoresis diffusions on the hematocrit and LDL concentration/diameter of pulsatile non-Newtonian blood in abdominal aortic aneurysm

Mohammad Abbasi et al.

Summary: The study found that small LDLs had the highest concentration on the wall of abdominal aortic aneurysm, and adding thermophoresis diffusion increased LDL concentration. Maximum Brownian diffusion was observed in vorticity places, and Brownian diffusion decreased while thermophoresis diffusion increased as hematocrit reached 45%.

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS (2021)

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Article Acoustics

A dual-functional metamaterial for integrated vibration isolation and energy harvesting

Ze-Qi Lu et al.

Summary: This paper proposes a dual-functional metamaterial for integrated low-frequency vibration isolation and energy harvesting, achieved by implanting a rolling-ball with coils into a spherical magnetic cavity. Numerical results demonstrate that a cavity mass arrayed beam with a periodic array of nonlinear energy harvesters has more and wider low-frequency band-gaps compared to traditional metamaterials.

JOURNAL OF SOUND AND VIBRATION (2021)

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Article Electrochemistry

Facile Synthesis of Co9S8 Nanocages as an Electrochemical Sensor for Luteolin Detection

Hao Cheng et al.

Summary: A novel Co9S8 nanocage was successfully fabricated and utilized as an efficient sensing platform for detection of luteolin, showing significant electrocatalytic activity and improved electrochemical response. The sensor exhibited excellent linear relationship, wide detection range (0.01-20 mu M), low detection limit (0.8 nM), good repeatability, reproducibility, and selectivity, as well as simplicity and low cost for accurate and precise determination of luteolin in actual samples.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

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Article Physics, Multidisciplinary

Application of Arrhenius kinetics on MHD radiative Von Karman Casson nanofluid flow occurring in a Darcy-Forchheimer porous medium in the presence of an adjustable heat source

P. Ragupathi et al.

Summary: This research paper investigates the effects of nonlinear Rosseland thermal radiation and temperature-dependent heat generation on non-Darcian steady MHD convective Casson nanofluid flows over a radially extended rotating disk. By utilizing a trustworthy BVP4C numerical algorithm, the resulting boundary value problem is successfully solved, showing that the nanofluid motion slows down significantly with certain parameters. Additionally, thermal enrichment can be achieved by adjusting parameters related to heat generation, thermal radiation, and nanoparticle motion.

PHYSICA SCRIPTA (2021)

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Article Green & Sustainable Science & Technology

CFD-based irreversibility analysis of avant-garde semi-O/O-shape grooving fashions of solar pond heat trade-off unit

Chao Liu et al.

Summary: Balancing thermal and frictional factors in spiral piping system design for solar ponds is crucial yet challenging. Various innovative grooving designs were proposed, each with unique thermal and frictional behavior. The study examined the impact of inlet positions on irreversibilities and found significant differences based on the innermost or outermost inlet selection.

RENEWABLE ENERGY (2021)

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Article Energy & Fuels

Thermal/frictional performance of spiral pipe with ring-shape depression used as in-pond heat exchanger

Yan Cao et al.

Summary: In this study, a simple and cost-effective technique for enhancing heat extraction in salinity-gradient solar ponds was proposed. By increasing turbulence inside the modified piping system, higher heat extraction was achieved without the need for additional equipment. The numerical simulations showed that the thermal performance factor (TPF) values were above 1 for all cases, indicating the justification of the modifications made.

SOLAR ENERGY (2021)

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Article Energy & Fuels

Investigation of the effect of adding nano-encapsulated phase change material to water in natural convection inside a rectangular cavity

Ehsan Golab et al.

Summary: The study investigates the effects of adding NEPCM nanoparticles to water in natural convection inside a cavity using numerical simulation. It is found that adding NEPCM enhances heat transfer rate of water, with optimal heat transfer occurring at the center of the cavity. The relationship between energy wall and heat transfer rate is explored in the study.

JOURNAL OF ENERGY STORAGE (2021)

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Article Engineering, Multidisciplinary