Scholarlink

<p>Efficient thermal management and entropy minimization are critical in advanced engineering systems such as microfluidic cooling devices, energy conversion units, biomedical transport processes, and porous thermal reactors. In this study, the bioconvection mixed flow of a magnetohydrodynamic Casson nanofluid containing gyrotactic microorganisms over a stretching surface embedded in a porous medium is analyzed. The aim is&#xa0;to improve heat and mass-transfer performance while reducing thermodynamic irreversibility. Involvement of motile microorganism in nanoliquid stabilizes and prevents agglomeration of nanoparticle suspension while nonlinear thermal radiation and density dynamics are as well&#xa0;investigated. Similarity transformations are used to convert the governing equations into coupled nonlinear ordinary differential equations, which are then numerically solved using the Galerkin weighted residual method. Irreversibility is assessed using entropy generation and Bejan number formulations while&#xa0;the most significant physical parameters are determined via a 10% sensitivity analysis. The results reveal that magnetic fields suppress fluid motion, whereas higher porous permeability enhances momentum transport. Nonlinear thermal radiation significantly increases temperature and entropy generation. Brownian motion and thermophoresis strongly govern heat and mass transfer while Casson fluid and Darcy parameters dominate wall shear behavior. Sensitivity analysis confirms that nanoparticle diffusion and dissipative effects are the primary drivers of thermal transport. Moreover, findings from this practically provide guidelines for optimizing energy-efficient thermal systems involving non-Newtonian nanofluids, bioconvection, and porous structures.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sensitivity analysis and entropy generation of bioconvection mixed non-darcian flow of Casson nanofluid experiencing thermal radiation over a stretching surface

  • 期刊论文

  • 发表日期：

    2026年3月10日

查看全文
  • Abdulazeez Sheriff,
  • Muhammed M. Hamza,
  • Bala Y. Isah,
  • Halima Usman,
  • Mojeed T. Akolade,
  • Abbas Y. Balarabe,
  • Ibrahim G. Usman

摘要

Efficient thermal management and entropy minimization are critical in advanced engineering systems such as microfluidic cooling devices, energy conversion units, biomedical transport processes, and porous thermal reactors. In this study, the bioconvection mixed flow of a magnetohydrodynamic Casson nanofluid containing gyrotactic microorganisms over a stretching surface embedded in a porous medium is analyzed. The aim is to improve heat and mass-transfer performance while reducing thermodynamic irreversibility. Involvement of motile microorganism in nanoliquid stabilizes and prevents agglomeration of nanoparticle suspension while nonlinear thermal radiation and density dynamics are as well investigated. Similarity transformations are used to convert the governing equations into coupled nonlinear ordinary differential equations, which are then numerically solved using the Galerkin weighted residual method. Irreversibility is assessed using entropy generation and Bejan number formulations while the most significant physical parameters are determined via a 10% sensitivity analysis. The results reveal that magnetic fields suppress fluid motion, whereas higher porous permeability enhances momentum transport. Nonlinear thermal radiation significantly increases temperature and entropy generation. Brownian motion and thermophoresis strongly govern heat and mass transfer while Casson fluid and Darcy parameters dominate wall shear behavior. Sensitivity analysis confirms that nanoparticle diffusion and dissipative effects are the primary drivers of thermal transport. Moreover, findings from this practically provide guidelines for optimizing energy-efficient thermal systems involving non-Newtonian nanofluids, bioconvection, and porous structures.