Numerical Analysis of Radiative Magnetoviscoelastic Micropolar Flow External to a Sphere With a Convective Boundary Surface Condition DOI
S. Abdul Gaffar,

O. Anwar Bég,

P. Ramesh Reddy

et al.

Heat Transfer, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

ABSTRACT Increasing attention is being paid to the study of heat transfer properties non‐Newtonian fluids as a result their growing use in many industrial and manufacturing processes. Micropolar have garnered lot interest for potential uses because distinctive microstructures. Both viscoelastic microstructural characteristics fluid make it mimic several polymers. Motivated by magnetic polymer coating dynamics operations, this article, thermoconvective nonlinear, steady‐state boundary layer flow an incompressible third‐grade micropolar from isothermal sphere with field thermal radiation investigated theoretically numerically. The model incorporates microelement gyratory (rotating) motions accurately simulates complex polymeric suspensions. An accurate implicit finite‐difference Keller‐Box method second order used solve numerically modified nondimensional conservation equations under physically suitable conditions. Verification code conducted using previous special cases literature. impacts parameters, that is, parameter ( ϕ ), material parameters ε 1 , 2 Biot number γ R Prandtl Pr M V Eringen vortex viscosity K dimensionless tangential coordinate ξ ) on linear (translational) velocity, angular temperature distributions are computed depicted graphically. Additionally, selected skin friction, wall couple stress (wall velocity gradient), Nusselt rate) also examined. As increases, accelerates farther away surface while decelerating close it. oscillatory response microrotation (angular) indicates reverse spin microelements. coupling (i.e., ratio Newtonian dynamic viscosity) causes accelerate decreasing closer Skin friction both increased, local depleted higher values parameter. With elevation (), there marked increase whereas (sphere gradient) depleted. There significant depletion rate (Nusselt number) increasing first exhibit considerable elevation. reduced. interaction parameter, significantly damped, enhanced (further surface) elevated substantially, thickness polymer. current simulations relevant high‐temperature processing electromagnetic polymers curved bodies.

Language: Английский

Investigation of the unsteady MHD fluid flow and heat transfer through the porous medium asymmetric wavy channel DOI Creative Commons
Bahram Jalili, Ali Ahmadi Azar, Payam Jalili

et al.

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 61, P. 104859 - 104859

Published: Aug. 5, 2024

This paper uses three analytical methods to find the novel results in two-dimensional time-dependent MHD oscillatory flow and heat transfer an asymmetric wavy porous channel. The corresponding constitutive equations become complex by considering pressure gradient as a function. existence of both real imaginary solutions for fluid velocity temperature. changes parameters like Hartmann number, wavelength, Grashof medium shape factor will affect velocity. Still, only radiation parameter Increasing factor, drastically reduce Reynolds number should theoretically velocity, but according boundary condition definition, value becomes zero. Altering frequency walls Peclet temperature component, increasing these increase average profile. uniqueness this study lies resolution differential way that has not been attempted before. indicated each set was nearly identical, highlighting outcomes' precision.

Language: Английский

Citations

43
Numerical simulations of energy storage performance in a close configuration: A Galerkin finite element-based computation DOI Creative Commons
Afraz Hussain Majeed, Dong Liu, Ahmed Refaie Ali

et al.

Alexandria Engineering Journal, Journal Year: 2024, Volume and Issue: 104, P. 56 - 65

Published: June 21, 2024

Language: Английский

Citations

31
Effect of variations hollow of octagon porous media on heat and mass transfer DOI Creative Commons

Musa Bahmani,

Bahram Jalili, Payam Jalili

et al.

International Journal of Thermofluids, Journal Year: 2024, Volume and Issue: 21, P. 100576 - 100576

Published: Jan. 19, 2024

This study investigates stream function, temperature distribution, and concentration distortion of porous media with three types hollow. The key factors in conductive heat mass transfer are the number vanes hollows various hollows, including semi-circle, square, triangle vanes, which novelty this research. Furthermore, valuable result present is that semi-circle had a higher than square vanes. It matter to analyze phenomena used mutually coupled equations FEM. finite element approach employed compare distribution small large hollows. Based on obtained numerical results, most effect was reduction related On other hand, Nusselt bottom wall influence extremely, results depended some parameters such as ε, Diffusion, Radiation, Rayleigh number. Finally, Stream distortion, octagon analyzed develop knowledge transfer.

Language: Английский

Citations

26
Thermal study of MHD hybrid nano fluids confined between two parallel sheets: shape factors analysis DOI Creative Commons
Bahram Jalili,

Pooriya Majidi Zar,

Dong Liu

et al.

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 63, P. 105229 - 105229

Published: Oct. 5, 2024

Language: Английский

Citations

22
Analytical solution for MHD nanofluid flow over a porous wedge with melting heat transfer DOI Creative Commons
Ali Ahmadi Azar, Payam Jalili, Zahra Poolaei Moziraji

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(15), P. e34888 - e34888

Published: July 22, 2024

This study employs the Hybrid Analytical-Numerical (HAN) method to investigate steady two-dimensional magnetohydrodynamic (MHD) nanofluid flow over a permeable wedge. Analyzing hyperbolic tangent flow, governing time-independent partial differential equations (PDEs) for continuity, momentum, energy, and concentration transform into set of nonlinear third-order coupled ordinary (ODEs) through similarity transformations. These ODEs encompass critical parameters such as Lewis Prandtl numbers, Brownian diffusion, Weissenberg number, thermophoresis, Dufour Soret magnetic field strength, thermal radiation, power law index, medium permeability. The explores how variations in these impact velocity field, skin friction coefficient, Nusselt, Sherwood numbers. Noteworthy findings include sensitivity fluid like wedge angle, permeability, melting heat transfer. coefficient experiences significant increase with specific parameter changes, while Nusselt numbers remain relatively constant. local Reynolds number significantly affects less pronounced on coefficient. study's uniqueness lies employing analytical HAN extracting recent insights from results.

Language: Английский

Citations

21
A novel approach to micropolar fluid flow between a non-porous disk and a porous disk with slip DOI
Bahram Jalili, Ali Ahmadi Azar, Kamran Esmaeili

et al.

Chinese Journal of Physics, Journal Year: 2023, Volume and Issue: 87, P. 118 - 137

Published: Nov. 23, 2023

Language: Английский

Citations

26
Analytical formulation of the steady-state planar Taylor–Couette flow constitutive equations with entropy considerations DOI
Bahram Jalili, Ali Ahmadi Azar, Dong Liu

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

This study presents a comprehensive analytical approach to address the complexities of flow and heat transfer in planar Taylor–Couette systems. Utilizing innovative simplifying assumptions conversion variables, we analyze fluid dynamics between two cylinders, where outer cylinder is hotter, inner rotates at higher velocity. Employing cylindrical coordinate system, research derives governing equations for continuity, momentum, energy dimensions under steady-state conditions. These nonlinear partial differential are transformed into set ordinary (ODEs) using specific facilitating more practical analysis flow. The leverages distinct mathematical methods solve ODEs, introducing novel application penalty function replace pressure term, which traditionally used numerical studies. Our findings indicate that with Reynolds number (Re) 900 Prandtl (Pr) 6.9, dimensionless radial velocity approaches zero, validating model. reveals significant tangential gradient cylinders an efficient from cylinder, entropy values decreasing radially outward. Quantitative results include calculated Nusselt numbers 1.58 −0.58 while skin friction coefficients −0.0049 −0.0012, respectively. non-negative corroborate compliance second law thermodynamics, ensuring robustness results. Additionally, delves generation, number, coefficient, offering holistic view dynamics.

Language: Английский

Citations

13
Heat and mass transfer conduct in an unsteady two- dimensional stream between parallel sheets DOI Creative Commons

Pooriya Majidi Zar,

Payam Jalili, Bahram Jalili

et al.

South African Journal of Chemical Engineering, Journal Year: 2024, Volume and Issue: 50, P. 109 - 124

Published: July 27, 2024

In the present research, an effort has been made to analytically solve heat and mass linear/ nonlinear as well steady/ unsteady equations in a viscous nanofluid squeezed between parallel sheets. Using Python SymPy library, with properties sheets analyzed symbolically flow, heat, transfer effects through Homotopy Perturbation Method Akbari-Ganji approaches. The two nanofluids selected conduct this study are Copper Al2O3, whose sizes 29 nm 47 respectively. provided details encompass outcomes of active variables on flow coupled mass. methods have resulted top-of-the-line consequences compared analytical numerical This research highlights faster more accurate computation analytic section study. outcome shows that increase Prandtl number Eckert will Nusselt. However, skin friction increases Schmidt number. Furthermore, rise parameters related chemical reactions leads elevated Sherwood presented here provide innovative precise insight, comparison available literature also proves there is well-agreed calculation. Microchips engineering medical-related industries would enjoy obtained from maximum minimum amounts respect occur at η=0 η=1. Moreover, error equal 0.0001 0.00001, concentration η=1 order. Finally, 0.000016 0.000002,

Language: Английский

Citations

11
Thermal study of magnetohydrodynamic nanofluid flow and brownian motion between parallel sheets DOI Creative Commons

Pooriya Majidi Zar,

Bahram Jalili, Payam Jalili

et al.

International Journal of Thermofluids, Journal Year: 2024, Volume and Issue: 23, P. 100806 - 100806

Published: Aug. 1, 2024

Language: Английский

Citations

11
MHD Casson non-Newtonian fluid flow in a channel with expanding/contracting porous walls in the presence of thermal radiation DOI

Fatemeh Nadalinia Chari,

Payam Jalili, Bahram Jalili

et al.

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: April 1, 2024

In this research, we explore the impact of changing viscosity in context asymmetric laminar flow Casson fluid with thermal radiation. The occurs within a channel that can either expand or contract, featuring porous walls. equations are converted into ordinary differential (ODEs) through appropriate transformations to simplify analysis. velocity field and temperature profile expressions obtained using Akbari-Ganji's method (AGM) finite-element (FEM). graphs show different parameters on characteristics, especially viscosity-dependent parameter, expansion ratio. near lower wall increases parameter but decreases after mid-point. is more affected by temperature-dependent for Newtonian than non-Newtonian fluid. results showed as Prandtl number increases, decreases, while an increase Radiation parameter. Also, An ratio leads higher temperatures, whereas decrease power-law index reduced temperatures. we've acquired were cross-referenced prior studies, revealing employed methods exhibit high precision. novelty present work obtaining new use semi-analytical method.

Language: Английский

Citations

10