Optimization of wavy trapezoidal porous cavity containing mixture hybrid nanofluid (water/ethylene glycol Go–Al2O3) by response surface method

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Янв. 30, 2023

Abstract Increasing thermal performance and preventing heat loss are very important in energy conversion systems, especially for new complex products that exacerbate this need. Therefore, to solve challenge, a trapezoidal cavity with wavy top wall containing water/ethylene glycol GO–Al 2 O 3 nanofluid is simulated using Galerkin finite element method. The effects of physical parameters affecting fluid flow, including porosity (ℇ), radiation (Rd), magnetic field angle (α), Rayleigh number (Ra) Hartmann (Ha), investigated the determined ratios. results applied boundary conditions showed optimal values Ra, Ha, ℇ, Rd α 1214.46, 2.86, 0.63, 0.24 59.35, respectively. Considering changes have little effect on streamlines isothermal lines. Optimization by RSM Taguchi integration resulted Nu detection. It provided correlation average based determinants due conflicting influence study factors, which finally calculated highest Nusselt 3.07. ideal design, primary goal research, increases performance.

Язык: Английский

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Double-diffusive magneto-natural convection of nanofluid in an enclosure equipped with a wavy porous cylinder in the local thermal non-equilibrium situation

Case Studies in Thermal Engineering, Год журнала: 2023, Номер 43, С. 102785 - 102785

Опубликована: Фев. 7, 2023

The emphasis of this study is the numerical analysis via finite volume method magneto-natural convection induced by double-diffusion a nanofluid within an enclosure equipped with wavy porous cylinder. cylinder which under local thermal non-equilibrium (LTNE) situation modeled using Darcy-Brinkman-Forchheimer design as momentum equation. Results are interpreted and evaluated in terms dimensionless controlling variables such Rayleigh number (Ra), Lewis (Le), Hartman (Ha), buoyancy ratio parameter (N), Darcy number, (Da), medium's porosity (ε) at given heat transfer coefficient for solid/fluid inter-phase (H) modified conductivity (γ) region. Corcione's correlations 4% Al2O3 nanoparticles used to estimate nanofluid's viscosity. Findings show that mass transfers improved Ra, Da, ε augmentation Ha Le diminution. In general, increases, rate rises while corresponding drops. Also, we identified value N where Le-dependent rates minimal. Moreover, found be more sensitive changes properties than rate. Furthermore, LTNE everywhere exists except center LTE realized.

Язык: Английский

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Enhanced conjugate natural convection in a corrugated porous enclosure with Ag-MgO hybrid nanofluid

International Journal of Thermofluids, Год журнала: 2024, Номер 21, С. 100574 - 100574

Опубликована: Янв. 17, 2024

Understanding the impact of hybrid nanofluids (NF) on natural convection (NC) within complex enclosures can significantly advance efficiency heat transfer (HT) mechanisms. These advancements play a crucial role in various engineering applications, such as thermal systems electronics, energy conversion, and exchangers. This study numerically examined NC taking place sinusoidal corrugated enclosure filled with an Ag-MgO NF. system was heated differentially by vertical solid wall. The right wall is maintained at isothermal high-temperature Th, while left cavity kept low-temperature Tc​. contact porous medium (PM) saturated cavity's In contrast, top bottom horizontal walls are adiabatic. governing equations were solved employing Galerkin weighted residual finite elements approach. domain modeled Darcy-Brinkman formulation. parameters being studied encompass Darcy number (10−5 ≤ Da 10−2), Rayleigh (103 Ra 106), nanoparticle volume fraction (0 ϕ 0.04), amplitude waviness (0.05 A 0.2), undulations (1 N 4). results highlighted that introduction nanoparticles into pure fluid enhances HT rate across parameter spectrum. highest average Nusselt (Nuav) attained = 106, 10−2, 0.2 4. findings current have practical implications for industrial particularly cooling electronic devices.

Язык: Английский

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Local thermal non-equilibrium effects on radiative ternary hybrid nanofluid with thermophoresis and Stefan Blowing impacts: Yamada-Ota and Xue model

Journal of Radiation Research and Applied Sciences, Год журнала: 2025, Номер 18(1), С. 101315 - 101315

Опубликована: Фев. 5, 2025

Язык: Английский

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Thermal energy transport of radioactive nanofluid flow submerged with microorganisms with zero mass flux condition

Waves in Random and Complex Media, Год журнала: 2022, Номер unknown, С. 1 - 23

Опубликована: Май 12, 2022

The importance of nanoparticles has evolved over the twenty-first century due to crucial applications in numerous thermophysical systems and increased sustainability. Based on improvements, current work plans explore Darcy free convection around an isothermal vertical cone with a fixed apex half-angle pointing downward nano liquid saturated porous medium. It is considered that medium consists oxytactic microorganisms nanoparticles. subjected concentration microorganisms' density. impacts Brownian movement thermophoresis are involved model for nanoliquids. Solar radiation convective heating phenomena added energy equation increase thermal distribution phenomena. Zero mass flux applied at boundary. Employing appropriate non-dimensional parameters transforms system nonlinear ordinary differential equations. These equations solved mathematically by 4th order Runge-Kutta method along shooting algorithm. leading dimensionless parameters, such as velocity, concentration, temperature, microorganism's density, local numbers (Nusselt, Sherwood, density) examined detail. Mathematical computation carried out different values define flow properties. observed nanoparticle diminishes increasing movement. Furthermore, motile organism profile declines increment bioconvection Lewis number.

Язык: Английский

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Application of fractional derivatives in a Darcy medium natural convection flow of MHD nanofluid

Ain Shams Engineering Journal, Год журнала: 2023, Номер 14(9), С. 102093 - 102093

Опубликована: Янв. 3, 2023

Nanofluid thermophysical characteristics are critical for predicting heat transfer behavior. This attempt provides a computational assessment of boundary layer flow and behavior fractional Maxwell viscoelastic nanofluid their hybrids over permeable vertical surface. The effects Lorents buoyancy forces also considered in the region. problem is modeled with novel distributed order time derivatives to achieve control transfer. Mid-point quadrature approach used process integrals, whereas nonlinear coupled discretized through finite difference method along withL1- algorithm. results shows that rate enhanced 56.51% by enhancing thermal Grashof number. Further, increase nanoparticles volume fraction causes enhancement conductivity. More characteristic on velocity temperature fields shown graphically analyzed detail. involvement derivatives, importance simulated results, which can be helpful effectively related engineering issues, like management internal combustion engines, cooling devices, exchangers.

Язык: Английский

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Thermal instability of Tri-hybrid Casson nanofluid with thermal radiation saturated porous medium in different enclosures

Chinese Journal of Physics, Год журнала: 2023, Номер 87, С. 710 - 727

Опубликована: Дек. 29, 2023

Язык: Английский

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Numerical Crank-Nicolson methodology analysis for hybridity aluminium alloy nanofluid flowing based-water via stretchable horizontal plate with thermal resistive effect

Case Studies in Thermal Engineering, Год журнала: 2023, Номер 42, С. 102707 - 102707

Опубликована: Янв. 5, 2023

Hybrid nanofluid (HNF) is a new and improved type of models that widely employed in fluid flow regimes to increase thermal efficiency. The purpose this effort investigate HNF two dimensions over horizontal sheet while accounting for the effects Joule heating, viscous dissipation, suction, slip. impact regulating parameters on skin friction heat transfer also investigated. used investigation mixture water types solid nanoparticles, namely aluminium alloys AA7072 AA7075. numerical solutions partial differential equations are obtained using Crank-Nicolson method. outcomes illustrated detailed ranges connection parameters. slip effect diminishes temperature outline from system wall temperature. Shrinking movement plays key role manipulating fluidity dispersal. Magnetic strength pulls down meanwhile, it assists dispersion, fractional force, Nusselt number.

Язык: Английский

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A practical algorithm for the design of multiple-sized porous scaffolds with triply periodic structures

Mathematics and Computers in Simulation, Год журнала: 2024, Номер 220, С. 481 - 495

Опубликована: Фев. 12, 2024

Язык: Английский

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Wave oscillations in thermal boundary layer of Darcy-Forchheimer nanofluid flow along buoyancy-driven porous plate under solar radiation region

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 54, С. 103980 - 103980

Опубликована: Янв. 4, 2024

The significant contribution of current mechanism is to explore the periodical and fluctuating results heat mass flux Darcy-Forchheimer nanofluid flow along buoyancy-driven porous plate under solar radiation region. Flow through a Darcy-medium has wide range applications such as use oil in various hydrothermal transfer control, radioactive nuclear disposal systems, water improvement, filtration water. dimensional model transformed into non-dimension for scaling factors. primitive-based transformation applied on steady oscillatory parts smooth algorithm FORTRAN language machine. convenient again reduced algebraic pattern by using implicit finite difference method. numerical graphical velocity, temperature concentration are executed Gaussian elimination To enhance frequency wavelength, impact radiations, thermophoresis, Brownian movement, Schmidt factor, Prandtl porosity buoyancy pressure periodic nanoparticles with Darcy Forchheimer relation. novelty this proposal wave oscillations, amplitude phase angle thermal boundary layer It noticed that prominent wavelength layers generated significance variation increases radiation, motion thermophoresis increases. transport enhances modified force In thermodynamic Darcy-porous materials assumption employed many domains, especially clinical science, petrochemical structural engineering, geography, biochemistry biological physics, material science. For energy storage conservation, required batteries, fuel cells super capacitors.

Язык: Английский

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