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Research Article
Parametric Assessment of Thermal Energy Transport in Magnetohydrodynamic Silver Nanofluid Flow over a Cylindrical Geometry
Ojo Adetoye Solomon*
,
Nwabuzor Peter Onyelukachukwu
Issue:
Volume 12, Issue 3, September 2026
Pages:
79-93
Received:
22 July 2026
Accepted:
30 July 2026
Published:
20 August 2026
Abstract: Thermal energy transport remains a critical challenge in engineering systems, particularly in applications involving advanced cooling technologies, chemical processing, energy conversion, and thermal management devices. This study presents a parametric assessment of thermal energy transport in magnetohydrodynamic (MHD) silver nanofluid flow over a cylindrical geometry by examining the influence of key thermo-physical and flow parameters on heat and mass transfer characteristics. To accurately predict the effective properties of the nanofluid, hybrid constitutive models were adopted by combining the thermal conductivity correlations of Jang and Choi (2004) and Xue (2005), together with the viscosity models of Mooney (1951) and Saito (1950). These models account for the effects of nanoparticle concentration, particle size, temperature, and particle geometry on the transport properties of the nanofluid. The mathematical formulation consists of the continuity, momentum, energy, and concentration equations expressed in cylindrical coordinates. The governing equations incorporate magnetohydrodynamic effects and thermal radiation through the Rosseland diffusion approximation. Analytical solutions were obtained using the Laplace transform technique and evaluated with Wolfram Mathematica Version 12. The influence of the governing dimensionless parameters on the velocity, temperature, and concentration distributions, together with the engineering performance indices including skin friction coefficient, Nusselt number, and Sherwood number, was systematically investigated. The results reveal that increasing the Prandtl number significantly suppresses the thermal boundary layer, leading to a reduction in the nanofluid temperature profile. A similar decline in temperature is observed with increasing thermal radiation parameter, indicating enhanced thermal energy dissipation. Furthermore, variations in the Grashof number, Reynolds number, Schmidt number, and chemical reaction parameter substantially influence the momentum, thermal, and concentration boundary layers. The combined thermo-physical models provide improved prediction of transport behaviour and demonstrate the potential of silver nanofluids for enhanced thermal performance in engineering systems involving cylindrical geometries under magnetic field effects.
Abstract: Thermal energy transport remains a critical challenge in engineering systems, particularly in applications involving advanced cooling technologies, chemical processing, energy conversion, and thermal management devices. This study presents a parametric assessment of thermal energy transport in magnetohydrodynamic (MHD) silver nanofluid flow over a ...
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Research Article
Unsteady Magnetohydrodynamic Flow of a Chemically Reactive Fluid Past an Inclined Porous Plate Embedded in a Porous Medium with Thermal-Diffusion Effects
Henry Martyns,
Liberty Ebiwareme*,
Roseline Ize Ndu
Issue:
Volume 12, Issue 3, September 2026
Pages:
94-105
Received:
10 August 2026
Accepted:
22 August 2026
Published:
15 September 2026
Abstract: This study elucidates the unsteady magnetohydrodynamic (MHD) flow of a chemically reactive, electrically conducting fluid past an inclined porous plate embedded in a saturated porous medium, considering the effects of chemical reaction and thermal diffusion. The governing equations describing momentum, energy, and species transport are formulated under the boundary-layer approximation, accounting for magnetic field, porous medium resistance, thermal and solutal buoyancy, plate inclination, and flow unsteadiness. The dimensionless governing equations are solved via the regular perturbation method, and the effects of the controlling parameters on the velocity, temperature, and concentration fields are examined alongside the skin-friction coefficient, local Nusselt number, and Sherwood number. The results show that increasing the magnetic field strength and porous medium resistance suppresses fluid motion, whereas thermal and solutal buoyancy enhance the flow. Soret effect promotes species diffusion by enhancing mass transfer induced by temperature gradients. In contrast, stronger chemical reactions reduce concentration levels within the boundary layer. The interaction of these physical mechanisms significantly influences the momentum, heat, and mass transfer characteristics. The findings offer valuable theoretical insights for analyzing and optimizing reactive MHD transport processes in porous media, with applications in chemical processing, thermal engineering, and energy conversion systems.
Abstract: This study elucidates the unsteady magnetohydrodynamic (MHD) flow of a chemically reactive, electrically conducting fluid past an inclined porous plate embedded in a saturated porous medium, considering the effects of chemical reaction and thermal diffusion. The governing equations describing momentum, energy, and species transport are formulated u...
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Research Article
System Dynamics Modeling of the Impact of Economic Growth and Carbon Pricing on Greenhouse Gas Emissions in the Niger Delta
Godspower Chukwunedum Abanum,
George Smart Nduka*
Issue:
Volume 12, Issue 3, September 2026
Pages:
106-115
Received:
15 June 2026
Accepted:
14 August 2026
Published:
18 September 2026
DOI:
10.11648/j.ijamtp.20261203.13
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Abstract: The Niger Delta in Nigeria is an area of high economic activity, especially in the oil and gas sector, which not only has been responsible for a considerable increase in the emissions of greenhouse gases but also has caused the degradation of the environment. It is thus a main challenge for the government to come up with policies that would make it possible for economic growth to continue while the environment is still protected. The current research presents a mathematical model that is based on system dynamics to analyze the interactions among the three forces of economic growth, carbon pricing policies, and greenhouse gas emissions in the Niger Delta region. The model combines the dynamics of macroeconomic growth, mechanisms of emissions production, and carbon pricing as a form of regulatory feedback control. A set of coupled nonlinear differential equations is created to describe the changes in output, emissions intensity, cumulative emissions, and carbon price dynamics over time. The fundamental qualitative characteristics of the model, like positivity, boundedness, equilibrium existence, and stability, are proven. A semi-analytical solution method that uses the Differential Transform Method (DTM) is applied to derive the dynamic solutions and policy implications that are approximated. The scenario analyses exhibit that putting in place a reasonable carbon price can lead to a situation where economic growth is no longer accompanied by emissions growth, thus making it possible for the environment to be sustainable in the long run without any major contraction in the economy. The findings give a numerical framework for the design of climate and environmental policies that are in line with the goal of sustainable development in the Niger Delta.
Abstract: The Niger Delta in Nigeria is an area of high economic activity, especially in the oil and gas sector, which not only has been responsible for a considerable increase in the emissions of greenhouse gases but also has caused the degradation of the environment. It is thus a main challenge for the government to come up with policies that would make it...
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