Investigation of the unsteady MHD fluid flow and heat transfer through the porous medium asymmetric wavy channel

Case Studies in Thermal Engineering, Год журнала: 2024, Номер 61, С. 104859 - 104859

Опубликована: Авг. 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.

Язык: Английский

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Simulation of radiative nonlinear heat dynamism on Buongiorno-modeled nanoliquid through porous inclined plate with adjustable chemical response

Modern Physics Letters B, Год журнала: 2024, Номер unknown

Опубликована: Апрель 5, 2024

Nanofluids are the fluid suspensions in nanoparticles. A considerable enhancement their features is less nanoparticle concentrations. Various studies on nanofluids focused representing performance with respect to functions — here enhancing straight heat transfer was critical, like that nuclear reactors, transportation, different industrial settings, biology, food and electronics. Hence, this consideration analyzes utilization of novel mathematical method, called bvp4c method by viscous energy research Buongiorno-modeled nanoliquid confined apt permeable plate along slip mechanism. The thermophoresis Brownian dispersion affects again assumed. This solutal thermal dependent appreciable effect source, variable chemical reactions nonlinear radiation. dimensional model partial differential equations (PDEs), applied precise related applications, had been adapted into ordinary (ODEs). modified Nusselt number decreases increasing heating, radiation, parameter motion, always it rises due temperature ratio parameter. validation outcomes attained past solutions free convectional flow non-magnetic research. There many petroleum industries engineering electroplating, processing substantial metals solar water heaters.

Язык: Английский

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Analytical solution for MHD nanofluid flow over a porous wedge with melting heat transfer

Heliyon, Год журнала: 2024, Номер 10(15), С. e34888 - e34888

Опубликована: Июль 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.

Язык: Английский

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Analytical formulation of the steady-state planar Taylor–Couette flow constitutive equations with entropy considerations

Physics of Fluids, Год журнала: 2024, Номер 36(11)

Опубликована: Ноя. 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.

Язык: Английский

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

Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, Год журнала: 2024, Номер unknown

Опубликована: Апрель 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.

Язык: Английский

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Investigating the effect of structural changes of two stretching disks on the dynamics of the MHD model

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

Опубликована: Дек. 9, 2023

Abstract The purpose of this theoretical study is to explore the behavior an electrically conducting micropolar fluid when subjected a uniform magnetic field along vertical axis between two stretching disks as structure problem changes. In context, structural changes refer alterations in distance discs or rate discs. governing equations are set nonlinear coupled partial differential equations, which transformed into ordinary equation by similarity transformation. transformation results four dimensionless quantities and their derivatives that appear equations. Nine parameters derived via variables, including Reynolds number, parameter, radiation Prandtl Eckert Schmidt three parameters. Previous solutions focused on analyzing effect each parameter quantities. However, type analysis mainly mathematical does not provide practical results. This study’s primary novelty redefine analyze physical depend them. semi-analytical hybrid analytical numerical method (HAN-method) used solve demonstrate affect all five radial velocity, axial microrotation, temperature, concentration. most significant finding increase causes sharp temperature Nusselt number. Conversely, increasing decrease micro-rotation wall couple stress. They were compared previous specific case validate results’ accuracy.

Язык: Английский

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Computational study on torsional Casson fluid flow through concentric cylinders in a porous medium

Alexandria Engineering Journal, Год журнала: 2024, Номер 108, С. 400 - 414

Опубликована: Авг. 2, 2024

Язык: Английский

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The comprehensive analysis of magnetohydrodynamic Casson fluid flow with rectangular porous medium through expanding/contracting channel

Multidiscipline Modeling in Materials and Structures, Год журнала: 2024, Номер unknown

Опубликована: Окт. 28, 2024

Purpose This study examines fluid flow within a rectangular porous medium bounded by walls capable of expansion or contraction. It focuses on non-Newtonian with Casson characteristics, incompressibility, and electrical conductivity, demonstrating temperature-dependent impacts viscosity. Design/methodology/approach The is two-dimensional, unsteady, laminar, influenced small electromagnetic force conductivity. Hybrid Analytical Numerical Method (HAN method) resolves the constitutive differential equations. Findings fluid’s velocity parameter, viscosity variation resistive force, while temperature affected radiation Prandtl number, power-law index. Increasing parameter from 0.1 to 50 results in 4.699% increase maximum 0.123% average velocity. Viscosity 0 15 decreases 1.42%. Wall (a −4 4) increases 19.07% 1.09%. 100.92% wall 51.47% number change 7. Originality/value Understanding dynamics various environments crucial for engineering natural systems. research emphasizes critical role movements offers valuable insights designing systems requiring heat transfer. presents new findings transfer channel two parallel, contraction, which have not been previously reported.

Язык: Английский

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Numerical assessment of MHD hybrid nanofluid flow over an exponentially stretching surface in the presence of mixed convection and non uniform heat source/sink

Results in Engineering, Год журнала: 2024, Номер 22, С. 102294 - 102294

Опубликована: Май 27, 2024

The modern era is concerned about the problems related to heat transfer and energy storage. hybridization of nanofluids stands an important study due enhanced thermophysical properties these effective fluids. distinguished response hybrid towards thermal conductivity appreciated for heating cooling industrial purposes. Thus, current intends investigate effect magnetohydrodynamics radiation on aiding opposing flow nanofluid flowing over a porous exponentially stretching surface. influenced by presence stagnation point non-uniform source/sink while convective boundary conditions are also assumed. control equations exhibited according assumptions similarity transformation leads system ordinary differential from partial equations. deduced solved numerically using bvp4c technique, built-in MATLAB based algorithm. upshots spectacle results velocity temperature profiles behalf various parameters affecting flow. increasing values magnetic parameter ratio significantly impacts profile assisting flows. escalates higher parameter, Eckert number Biot number. Moreover, analysis delivers valued insights into friction drag considered model. gained can support in applications involving systems.

Язык: Английский

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Entropy optimization and heat transfer in thin film flow of electromagnetic micropolar nanofluid using Maxwell–Bruggeman and Krieger–Dougherty models

Alexandria Engineering Journal, Год журнала: 2024, Номер 106, С. 71 - 86

Опубликована: Июль 9, 2024

Язык: Английский

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