Computation of Transient Radiative Reactive Thermosolutal Magnetohydrodynamic Convection in Inclined MHD Hall Generator Flow With Dissipation and Cross Diffusion

Bég, O. Anwar; Sheri, Siva Reddy; Modugula, Prasanthi; Kadir, A

doi:10.1615/computthermalscien.2019026405

Cited by 17 publications

(7 citation statements)

References 46 publications

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“…The negative nature of this term indicates destructive chemical reaction and clearly, its augmentation will dampen the nanoparticle concentration values as a greater conversion of original species to a new product via chemical reaction will be induced with greater (Kr) values. Similar trends in magnetohydrodynamic boundary layer thermo solutal flows are presented by Sivaraj and Kumar [54,55], Kumar and Sivaraj [56], Sheri et al [57] and Beg et al [58]. Of course, extra complex chemical reactions may take place e.g.…”

Section: Resultssupporting

confidence: 74%

Finite difference computation of free magneto-convective Powell-Eyring nanofluid flow over a permeable cylinder with variable thermal conductivity

et al. 2020

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It is essential to account the variability in thermophysical properties such as thermal conductivity to obtain the characteristics of transport properties in industrial thermal systems more accurately. This phenomenon is especially significant in coating protection for rocket chambers, heat exchangers and power generation, wherein cooling techniques are required for sustaining temperature regulation and structural material integrity. At high operating temperatures, the working fluid and hot walls generally emit appreciable radiation. Mathematical models are therefore required which simultaneously analyse all three modes of heat transfer in addition to viscous flow and a variety of other effects including reactions (corrosion, combustion), mass diffusion and rheological behaviour. The modern thrust in nanoscale materials is a major consideration. Motivated by these applications, in this paper, a theoretical examination is implemented to analyse the impact of thermal conductivity variation and thermal radiation on chemically reacting, free convective Powell-Eyring nanofluid flow over a cylinder. The nanoscale effects are accounted by employing the Buongiorno model. The transformed governing equations are numerically solved by using Keller box method under suitable boundary conditions. The comparison results reveal that the obtained results find an excellent match with the results in the literature. The graphs and tables elucidate the impacts of various pertinent parameters on thermo-solutal transport characteristics. It is to be noted that amplifying thermal conductivity variation rises fluid velocity and temperature. Velocity of the fluid decelerates for elevating Darcy number. Magnifying the radiation corresponds to weak radiative flux and stronger thermal conduction which decrease the heat transfer whereas the mass transfer is increased. Furthermore, nanoparticle concentration decreases with greater first-order chemical reaction and Brownian motion parameter values.

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Section: Resultssupporting

confidence: 74%

Finite difference computation of free magneto-convective Powell-Eyring nanofluid flow over a permeable cylinder with variable thermal conductivity

et al. 2020

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“…A uniform radiative flux is applied transverse to the sheet plane. The polymer is assumed to absorb or emit radiation but not scatter radiation [32] and Rosseland's diffusion flux approximation, valid for high optical thickness is therefore deployed.…”

Section: Mathematical Model For Viscoplastic Non‐fourier Stretching P...mentioning

confidence: 99%

Mixed convection Casson polymeric flow from a nonlinear stretching surface with radiative flux and non‐Fourier thermal relaxation effects: Computation with CSNIS

et al. 2023

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Thermal non-Newtonian polymer coating flows is growing as a major area in materials processing. Inspired by new developments in this field which require more sophisticated mathematical models, the current investigation examines the laminar viscoplastic boundary layer flow and mixed convective heat transfer over a power-law nonlinear stretching surface. To simulate thermal relaxation effects the hyperbolic Cattaneo-Christov heat flux model is deployed. The non-Newtonian polymer characteristics are described by employing the Casson flow model. High temperature conditions invoke thermal radiation flux which is analyzed with an algebraic flux model. Via robust similarity transformations, the primitive partial differential conservation equations for momentum and energy equations are rendered into a system of coupled non-linear ordinary differential equations with associated wall and free stream boundary conditions. The emerging boundary value problem is solved numerically with an efficient Chebyshev Spectral Newton Iterative scheme (CSNIS), in the MATLAB platform. The resulting solutions are discussed for different emerging parameters using graphs and tables. Validation is included with special cases from the literature. With increasing power law stretching index increases, the flow is decelerated, and temperatures are reduced. Increment in mixed convection parameter boosts the velocity but suppresses temperature and thermal boundary layer thickness. Increasing non-Fourier Deborah number, temperatures are depleted whereas with increasing radiative flux parameter they are increased. With elevation in Casson non-Newtonian parameter, velocity is decreased whereas temperature is enhanced and Nusselt number is suppressed.

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“…The novelty is embodied in the simultaneous inclusion of multiple magnetic effects, a sophisticated micromorphic non-Newtonian model, and an alternative computational algorithm (modified cubic B-Spline differential quadrature method) which has never been considered collectively in previous studies. Ionslip and Hall's current effects have been extensively studied by Bég and co-workers [51][52][53][54] in the context of nuclear reactor transport modeling and magnetohydrodynamic energy generators (MHD). These studies have confirmed the substantial modification in velocity and temperature distributions produced with Hall current and ion slip which are relevant to, for example, seeded potassium interfacial flows in Hall and Faraday generator systems [55][56][57][58] and also hydromagnetic pumps and channel flow control in nuclear reactors.…”

Section: Articlementioning

confidence: 99%

Ion Slip and Hall Effects on Generalized Time-Dependent Hydromagnetic Couette Flow of Immiscible Micropolar and Dusty Micropolar Fluids with Heat Transfer and Dissipation: A Numerical Study

Chandrawat

Joshi

Bég³

2021

j nanofluids

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The hydrodynamics of immiscible micropolar fluids are important in a variety of engineering problems, including biofluid dynamics of arterial blood flows, pharmacodynamics, Principle of Boundary layers, lubrication technology, short waves for heat-conducting fluids, sediment transportation, magnetohydrodynamics, multicomponent hydrodynamics, and electrohydrodynamic. Motivated by the development of biological fluid modeling and medical diagnosis instrumentation, this article examines the collective impacts of ion slip, viscous dissipation, Joule heating, and Hall current on unsteady generalized magnetohydrodynamic (MHD) Couette flow of two immiscible fluids. Two non-Newtonian incompressible magnetohydrodynamic micropolar and micropolar dusty (fluid-particle suspension) fluids are considered in a horizontal duct with heat transfer. No-slip boundary conditions are assumed at the channel walls and constant pressure gradient. Continuous shear stress and fluid velocity are considered across the interface between the two immiscible fluids. The coupled partial differential equations are formulated for fluids and particle phases and the velocities, temperatures, and microrotation profiles are obtained. Under the physically realistic boundary and interfacial conditions, the Modified cubic-Bspline differential quadrature approach (MCB-DQM) is deployed to obtain numerical results. The influence of the magnetic, thermal, and other pertinent parameters, i.e. Hartmann magnetic number, Eckert (dissipation) number, Reynolds number, Prandtl number, micropolar material parameters, Hall and ion-slip parameters, particle concentration parameter, viscosity ratio, density ratio, and time on velocity, microrotation, and temperature characteristics are illustrated through graphs. The MCB-DQM is found to be in good agreement with accuracy and the skin friction coefficient and Nusselt number are also explored. It is found that fluids and particle velocities are reduced with increasing Hartmann numbers whereas they are elevated with increment in ion-slip and Hall parameters. Temperatures are generally enhanced with increasing Eckert number and viscosity ratio. The simulations are relevant to nuclear heat transfer control, MHD energy generators, and electromagnetic multiphase systems in chemical engineering.

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Computation of Transient Radiative Reactive Thermosolutal Magnetohydrodynamic Convection in Inclined MHD Hall Generator Flow With Dissipation and Cross Diffusion

Cited by 17 publications

References 46 publications

Finite difference computation of free magneto-convective Powell-Eyring nanofluid flow over a permeable cylinder with variable thermal conductivity

Finite difference computation of free magneto-convective Powell-Eyring nanofluid flow over a permeable cylinder with variable thermal conductivity

Mixed convection Casson polymeric flow from a nonlinear stretching surface with radiative flux and non‐Fourier thermal relaxation effects: Computation with CSNIS

Ion Slip and Hall Effects on Generalized Time-Dependent Hydromagnetic Couette Flow of Immiscible Micropolar and Dusty Micropolar Fluids with Heat Transfer and Dissipation: A Numerical Study

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