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<p>The present study investigates radiative magnetohydrodynamic (MHD) Darcy–Forchheimer flow and heat transfer of a Casson SWCNT-MWCNT/water hybrid nanofluid over a curved stretching/shrinking surface, with simultaneous inclusion of thermal radiation, Joule heating, internal heat generation, and porous‑medium inertial resistance. The novelty of this work lies in developing a unified boundary‑layer model for this Casson CNT‑based hybrid nanofluid configuration and in quantifying the combined influence of magnetic, curvature, Casson, Darcy–Forchheimer, radiation, heat source, Eckert number, suction, Prandtl number, and nanoparticle volume fractions on skin‑friction and Nusselt number characteristics relative to the base fluid. Similarity transformations reduce the governing equations to a coupled system of nonlinear ordinary differential equations, which are solved numerically using MATLAB’s bvp4c solver. The outcomes reveal that the incorporation of SWCNT-MWCNT nanoparticles, whose combined volume fraction is 0.02, causes an approximate rise in the Nusselt number of about 12 to 18%, thus confirming considerable improvements in thermal efficiency when contrasted with pristine water. Thermal radiation, internal heat source, and viscous dissipation cause a notable rise in the fluid temperature; however, higher values of the Prandtl number reduce the thickness of the thermal boundary layer along with increasing the thermal gradient at the surface. The magnetohydrodynamic effect causes an enhance in the thickness of the velocity boundary layer and a decrease in the velocity of the stretching sheet with an increase in the shrinking velocity of the sheet, and large values of the Casson parameter enhance wall shear stress.</p>

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Thermal analysis of enhanced heat transfer radiative MHD Darcy–Forchheimer Casson SWCNT-MWCNT hybrid nanofluid flow over a curved stretching/shrinking surface

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Pawan Kumar Jangir,
  • Ruchika Mehta,
  • Shilpa Choudhary,
  • Tripti Mehta

摘要

The present study investigates radiative magnetohydrodynamic (MHD) Darcy–Forchheimer flow and heat transfer of a Casson SWCNT-MWCNT/water hybrid nanofluid over a curved stretching/shrinking surface, with simultaneous inclusion of thermal radiation, Joule heating, internal heat generation, and porous‑medium inertial resistance. The novelty of this work lies in developing a unified boundary‑layer model for this Casson CNT‑based hybrid nanofluid configuration and in quantifying the combined influence of magnetic, curvature, Casson, Darcy–Forchheimer, radiation, heat source, Eckert number, suction, Prandtl number, and nanoparticle volume fractions on skin‑friction and Nusselt number characteristics relative to the base fluid. Similarity transformations reduce the governing equations to a coupled system of nonlinear ordinary differential equations, which are solved numerically using MATLAB’s bvp4c solver. The outcomes reveal that the incorporation of SWCNT-MWCNT nanoparticles, whose combined volume fraction is 0.02, causes an approximate rise in the Nusselt number of about 12 to 18%, thus confirming considerable improvements in thermal efficiency when contrasted with pristine water. Thermal radiation, internal heat source, and viscous dissipation cause a notable rise in the fluid temperature; however, higher values of the Prandtl number reduce the thickness of the thermal boundary layer along with increasing the thermal gradient at the surface. The magnetohydrodynamic effect causes an enhance in the thickness of the velocity boundary layer and a decrease in the velocity of the stretching sheet with an increase in the shrinking velocity of the sheet, and large values of the Casson parameter enhance wall shear stress.