Electro-enhanced natural convection analysis for an Al2O3-water-filled enclosure by considering the effect of thermal radiation DOI
Seyyed Masoud Seyyedi, M. Hashemi‐Tilehnoee, Elena Palomo del Barrio

et al.

Numerical Heat Transfer Part A Applications, Journal Year: 2023, Volume and Issue: unknown, P. 1 - 20

Published: Aug. 11, 2023

AbstractOne of the most crucial topics in thermal sciences is analysis how an external electric field affects natural convection flow. In this study, heat transfer electro-hydrodynamic enclosure with a wavy hot wall numerically studied. Al2O3-water nanofluid considered as working fluid, and furthermore, effect radiation on characteristics fluid flow simulated. Non-dimensional forms governing equations are solved using control volume finite element method. The effects operational parameters such Rayleigh number, nanoparticles volume-fraction, Lorentz force Eckert charge diffusivity number maximum absolute value stream function average Nusselt investigated. Two new defined to evaluate contribution electrical results show that Nuave ascends 7.95% when ϕ increases from 0 0.05 at Ra=105. Also, values |Ψmax| increase 27.6% 37.2%, respectively, λ goes up 0.5 Rd=1.0. decrease 48.7% 27.1%, decreasing amplitude parameter (an) 0.1 0.3 Ra=105.Keywords: CVFEMelectric fieldnanofluidnatural convectionthermal

Language: Английский

The influence of magnetic field on entropy generation in a wavy cavity equipped with internal heated plate using Darcy–Brinkman–Forchheimer model DOI Creative Commons
Naseer H. Hamza, Nabeel M. Abdulrazzaq, Maathe A. Theeb

et al.

International Journal of Thermofluids, Journal Year: 2023, Volume and Issue: 20, P. 100463 - 100463

Published: Sept. 16, 2023

In this study, entropy accumulation during thermal convection of a hybrid nanosuspension in an undulating cavity having interior heated plate is investigated relation to magnetic fields. The Darcy-Brinkman-Forchheimer approach employed simulate the liquid circulation and energy transport parameters, while impact Lorentz force on system's thermodynamic properties analyzed. To better understand characteristics complex phenomenon, best compromise combination different interacted parameters needed be set on. geometrical are number waves (N), length (s) inclination angle (γ) (δ). These studied with volume fractions compound nanofluid (φ = 0 − −0.02), Rayleigh numbers (103 −106), Darcy changes between (Da 10−5 −10−1) various Hartmann (Ha −60). mean Nusselt rises growth by about three times (≈300%), average skin friction parameter reduces wall approximately half (≈50%). Additionally, Bejan reaches its maximum value when equals (N 5). Taking into consideration objective function maximizing Nu minimizing frication coefficient (Cf), scenario determined at 3, s 0.4, γ π/3 δ π/2).

Language: Английский

Citations

15
Computational analysis of MHDMgO−water nanofluid flow inside hexagonal enclosure fitted with fins DOI Creative Commons

Sumeira Yasmin,

Shan Ali Khan, Nahid Fatima

et al.

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 43, P. 102788 - 102788

Published: Feb. 3, 2023

Fins are utilized in a variety of technical applications such as heat exchangers, electrical transformers, semiconductors, air-cooled engines, gas turbines, automotive radiators, hydrogen fuel cells, and so on. Nanofluids innovative designed fluids with improved thermal conductivity comparison to standard coolants. The nanofluids more efficient well repudiated transportation evaluated regular due nanoparticle presence the base medium. efficiency nanofluid is nanoparticles. With this motivation, objective present article analyze hydrothermal analysis MgO−water flow across hexagonal cavity inner circular cylinder. inside cylinder fitted various rectangular fins. upper bottom wall heated while other alls cold. dimensional equations transmuted into non-dimensional system by using suitable similarity alternation. tackled utilizing Galerkin finite element method computational COMSOL Multiphysics software. Different streamlines isotherms Nusselt number profile plots for significance Rayleigh (Ra), Hartmann (Ha) volume fraction (Φ) different fins length flow. From results, it observed that convection, velocity outcomes boosted up number. components reduces via increment nanoparticles concentration. Furthermore, reveals reduced local inverse trend noted fraction.

Language: Английский

Citations

14
Passive control of, energy storage of NePCM, heat and mass transfer with gamma-shaped baffle in a thermo-bioconvection system using CFD and artificial intelligence DOI
Shafqat Hussain, Fatih Ertam, Mohamed Bechir Ben Hamida

et al.

International Communications in Heat and Mass Transfer, Journal Year: 2023, Volume and Issue: 144, P. 106764 - 106764

Published: April 6, 2023

Language: Английский

Citations

14
Enhanced heat transmission in a triangular enclosure with a rotating cooled wall using Nano-Encapsulated Phase Change Material nanofluid under mixed convection DOI Creative Commons
Aissa Abderrahmane, Abdeldjalil Belazreg, Houssem Laidoudi

et al.

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 54, P. 103992 - 103992

Published: Jan. 10, 2024

Maximizing heat transfer rates within enclosed cavities is of paramount importance in various engineering applications. This study focuses on enhancing transmission efficiency through forced convection a triangular cavity containing rotating cylinder. The approach involves incorporating Nano-Encapsulated Phase Change Material (NEPCM), applying uniform magnetic field, and introducing cold, dynamically cavity's configuration maintains an elevated temperature the upper wall while inclined side walls remain cold. investigation also explores impact varying position cylinder cavity. Mathematical modeling undertaken using Galerkin finite element methodology. Numerical results reveal direct proportionality between Nusselt number (Nu) Darcy (Da), as well inverse Nu Hartmann (Ha). Elevating from 10−5 to 10−2 leads 54% increase number, increasing 0 100 12.5% decrease Nu. Intriguingly, positioning cold enclosure 240% enhancement highlights intricate interplay geometry external fields optimizing complex cavities.

Language: Английский

Citations

5
Partitions influence on rectangular latent heat thermal energy storage unit performance during melting and solidification DOI Creative Commons
Grzegorz Czerwiński, Jerzy Wołoszyn

International Communications in Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 159, P. 108047 - 108047

Published: Sept. 14, 2024

Language: Английский

Citations

5
Analysis of natural convection and the generation of entropy within an enclosure filled with nanofluid-packed structured pebble beds subjected to an external magnetic field and thermal radiation DOI
M. Hashemi‐Tilehnoee, Seyyed Masoud Seyyedi, Elena Palomo del Barrio

et al.

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 73, P. 109223 - 109223

Published: Oct. 11, 2023

Language: Английский

Citations

13
Investigating the effect of electric field amplitude on the thermal behavior of paraffin/Cu nanostructure in a tube containing non-connected rotating ribs using molecular dynamics simulation DOI

Ahmed Shawqi Sadeq,

Rassol Hamed Rasheed,

Shaima Albazzaz

et al.

Case Studies in Chemical and Environmental Engineering, Journal Year: 2025, Volume and Issue: 11, P. 101115 - 101115

Published: Jan. 27, 2025

Language: Английский

Citations

0
Computational Investigation of Heat Transfer and Fluid Flow in a NEPCM-Filled Cavity with Sinusoidal Porous Layer: Influence of Magnetic Field and Exothermic Reactions DOI Creative Commons
Mohammed Azeez Alomari, Ahmed M. Hassan,

Hawkar Birdawod

et al.

Case Studies in Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 106013 - 106013

Published: March 1, 2025

Language: Английский

Citations

0
Aspect ratio variation influence in minimizing entropy production generated by buoyancy driven flow of Newtonian fluid in L-shaped enclosure DOI
Noor Zeb Khan,

S. Bilal,

Wasim Jamshed

et al.

Proceedings of the Institution of Mechanical Engineers Part N Journal of Nanomaterials Nanoengineering and Nanosystems, Journal Year: 2025, Volume and Issue: unknown

Published: April 12, 2025

Minimizing entropy generation boosts the efficacy of thermal engineering systems by reducing energy losses. This method maximizes fuel cells, nuclear, and geothermal reactors, electronic heating cooling, photovoltaic storage energy, processing food. Entropy control is essential for contemporary heat conveyance uses because it enhances efficiency, sustainability, saving energy. Thus, this work presents a detailed investigation fluidic transmission entropic fluctuations caused enclosure aspect ratio change in naturally convective water flow an L-shaped chamber. Conservation rules are used to represent issue dimensional governing equations. After that, variables make constitutive equations dimensionless. The finite element (FEM) COMSOL Multiphysics solve issue. Graphs show viscous versus settings. Nusselt number total calculated against various factors. Comparing current data published research ensures accuracy. A step height produces more than width. decreases as Rayleigh ( Ra ) increases, but increases. Additionally, outperforms low irreversibility parameters. study suggests that temperature gradients contribute at levels, whereas forces Ra > 10 4 . (6.0955) (1033.9) peak Pr = 7 . 0 When ϕ − 3 , reaches its maximum value 70.

Language: Английский

Citations

0
Mixed convection of EG/NEPCM inside a lid-driven cavity with a rotating cylinder DOI Creative Commons
Yang Zhang,

Haitao Lin,

Rishabh Chaturvedi

et al.

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 47, P. 103072 - 103072

Published: May 20, 2023

Using the potential of nature's phenomena such as free convection phenomenon could help to cooling a piece, moving hot plate in lid-driven problems. Moreover, adding modern nanostructures named nano-encapsulated phase change material (NEPCM) with ability transition greatly improve heat transfer processes. In this study, mixed ethylene glycol (EG) and NEPCM was simulated inside cavity rotating cylinder evaluate contribution Grashof number, speed, concentration on characteristics. Hence, findings current numerical study indicated that 6% increased mean Nusselt number by 41.7%. speed enhanced 38.7%. Finally, there an optimum value for occurred 4% brought 104.

Language: Английский

Citations

10