Australian Journal of Mechanical Engineering, Год журнала: 2024, Номер unknown, С. 1 - 18
Опубликована: Июнь 13, 2024
Язык: Английский
International Journal of Thermofluids, Год журнала: 2024, Номер 21, С. 100571 - 100571
Опубликована: Янв. 15, 2024
The phenomenon of flow around a static or rotating circular cylinder has significant applications in various engineering fields, such as building, bridge, and structure engineering. It can be used to control flow-induced vibration, blowing suction, moving surfaces, acoustic thriller, synthetic jet. Additionally, there is need enhance heat transfer rates many life industrial applications, including cavity shape enhancement, heating cooling spread inside cavity, dissipation electronic devices, thermal mixing storage units, solar collectors, desalination, journal bearing lubrication. This study explores the effect horizontal magnetic field inner on mixed convection within two-dimensional oval-shaped enclosure filled with non-Newtonian nanofluid. Galerkin Finite Element Method (GFEM) utilized for analysis, undergoing differential wall wall, respectively. nanofluid consists water infused copper nanoparticles. simulation parameters, Richardson number (Ri), Hartmann (Ha), inclination angle (β), power-law index (n), circle center eccentricity (e), nanoparticles volume fraction (φ). been observed that Ha n increase different Ri values, wavy trend local Nusselt (Nu) profiles along source surface observed. rate decreases increasing combinations index. Under specific conditions, = 0.001, 60, e 0, φ 0.09, β 90, results show that, compared Newtonian fluid (n 1), exhibits percentage gains approximately 6.31% pseudo-plastic 0.6) 8.47% Dilatant 1.4). convective was significantly enhanced when positioned lower upper regions enclosure, particularly at - 0.3. highest were 60 240.
Язык: Английский
Процитировано
21
International Journal of Thermofluids, Год журнала: 2024, Номер 21, С. 100568 - 100568
Опубликована: Янв. 9, 2024
This extensive review aims to provide a thorough understanding of entropy generation (Egen) in confined conduits, or enclosures, by examining vast array peer-reviewed research. The covers various studies on Egen enclosures with different geometric configurations and highlights the significant effects thermo-physical dynamics, such as temperature gradient, viscous dissipation, frictional drag, magnetic field strength, characterization. broad range that investigate diverse types fluids, including air, water, nanofluids. Furthermore, also includes enclosure structures, I, L, C, U, semicircular, triangular, square, rectangular, rhombic, trapezoidal, polygonal, channel types, well wavy wall configurations. Notably, encompasses both 2D 3D cases present complete comprehension conduits. In addition, carefully evaluates validity methods utilized numerical investigations, incorporating mesh sizes A examination literature demonstrates obstacles, single multiple rotating cylinders, exhibit noticeable increase Egen. Also, use nanofluids significantly increases These findings have important practical implications analysis thermofluid systems, but not limited heat exchangers, chip cooling, food storage, solar ponds, nuclear reactor systems. Based comprehensive conducted this study, several future research directions been proposed for emerging enclosures. study explores intricate mechanisms potential avenues further investigation area. insights will contribute advancement knowledge base applications
Язык: Английский
Процитировано
16
International Journal of Thermofluids, Год журнала: 2024, Номер 22, С. 100706 - 100706
Опубликована: Май 1, 2024
The corrugated channels play a vital role in many engineering applications, such as electronic cooling and heat exchanger devices; thus, forced convection transfer entropy generation within the are important subjects to investigate. This study numerically investigated laminar of water flow sinusoidal channel. channel walls were subjected wall temperature heating while varying wave parameters. finite element method had been employed solve governing equation, simulation results conducted for Reynolds number 5 ≤ Re 500, dimensionless wavelength 0.25 λth 2.25, Prandtl Pr = 6.93. main findings depicted terms Nusselt number, skin friction coefficient, effectiveness, total generation, Bejan contours, well being compared with uniform heating. In addition, demonstrated that significantly improved < 1.75 all ranges critical was found, where showed higher rate non-uniform at ≥ . Besides that, it is found has lower than heating, except 0.25. investigation recommends more effective by 7.5, 2.78, 1.9, 1.52, 1.34 factors 0.25, 0.75, 1.25, respectively.
Язык: Английский
Процитировано
10
Results in Surfaces and Interfaces, Год журнала: 2025, Номер unknown, С. 100469 - 100469
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
1
International Communications in Heat and Mass Transfer, Год журнала: 2024, Номер 159, С. 108166 - 108166
Опубликована: Окт. 9, 2024
Язык: Английский
Процитировано
7
International Journal of Thermofluids, Год журнала: 2025, Номер unknown, С. 101057 - 101057
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1
Journal of Engineering Research, Год журнала: 2024, Номер unknown
Опубликована: Май 1, 2024
A numerical simulation was performed to investigate the characteristics of thermo-fluids and irreversibility generation laminar forced convection through three different channel designs. This article first presents a comprehensive study combination straight wavy sections in order create balance between improved thermal performance from design optimized flow properties section, leading an overall enhancement cooling efficiency. novel has been considered using configuration that consists lengths is named (cases I, II, III). The outcomes are shown terms average Nu, ratio (ER), factor, total generation, as well contours streamlines, isothermal, Bejan numbers for values Reynolds number range 5≤Re≤400 dimensionless wave amplitude 0.3≤α≤0.6. results were compared cases with plane channel, revealing augmentation HTR 73.7%, 64.9%, 43.3% III, respectively. On other hand, both Re α, increases continuously.
Язык: Английский
Процитировано
5
Heat Transfer, Год журнала: 2024, Номер 53(8), С. 4285 - 4315
Опубликована: Июль 26, 2024
Abstract Previous works that investigated the characteristics of heat transfer and fluid flow in channels with corrugated walls have been extensively reviewed this study. In accordance fast increase power consumption requirements, many researchers a new approach for cooling techniques can enhance performance devices without consuming more power. To improve efficiency energy systems, investigators engineers implement promising such as surface optimization additives passive methods to augment rates transfer. Researchers different corrugation profiles along various working fluids well external further exchange process thermal systems. The aim article is give clear preview effects parameters wave parameters, Reynolds number, type fluid, pulsating condition on average local Nusselt pressure drop, factors, irreversibility. main findings are listed tables depicted figures, matter helps choose suitable channel shape their applications.
Язык: Английский
Процитировано
4
Journal of Taibah University for Science, Год журнала: 2024, Номер 18(1)
Опубликована: Апрель 1, 2024
The present work focuses on investigating magnetohydrodynamic (MHD) natural convection in a complex I-shaped enclosure with corrugated walls, filled nanofluid and porous media layers. This study analyzes various parameters' effects heat transfer fluid flow. enclosure's left right walls maintain low temperatures, while the other are insulated. inner cylinder experiences high temperatures. examines impact of Rayleigh number (Ra), Hartman (Ha), volume fraction (ϕ), Darcy (Da), MHD inclination angle (γ), position (δ) undulations (N) isotherms, streamlines, velocity profiles average Nusselt variations. results show that higher Ra values increase increasing Da enhances it by 65%. Magnetic source greatly affects transfer, at γ = 90° being 15.34 compared to 10.234 0°. concludes optimal occurs 90°, 106, 10−3, Ha 30 N 2.
Язык: Английский
Процитировано
3
International Journal of Thermofluids, Год журнала: 2024, Номер 24, С. 100949 - 100949
Опубликована: Ноя. 1, 2024
Язык: Английский
Процитировано
3