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<p>The intricate dynamics of exponential heat sources and thermal radiation have garnered significant attention in enhancing heat transfer efficiency in advanced fluid flow systems. When coupled with Electro-Magneto-Hydrodynamic (EMHD) effects, these mechanisms offer unparalleled control over thermal and flow characteristics, particularly in hybrid nanofluid systems that synergize the superior thermal properties of multiple nanoparticles. Such studies have practical relevance in designing energy-efficient cooling systems, high-precision thermal control in microfluidics, and aerospace thermal shields. With this motivation, this research explores the impact of nonlinear thermal radiation (NLTR) and an exponential space-dependent heat source (ESHS) on the stagnation point dynamics of hybrid nanofluid flow across a contracting Riga surface. The hybrid nanofluid, a blend of water, alumina, and copper oxide nanoparticles, is analyzed under the framework of the EMHD fluid flow model, incorporating linear first-order velocity slip and uniform surface temperature boundary conditions. Through the application of suitable similarity transformations, the nonlinear coupled partial differential equations are transformed into ordinary differential equations, enabling numerical analysis. Utilizing the Runge–Kutta algorithm coupled with the shooting procedure, the transformed equations are solved to unveil detailed insights into flow behavior and thermal characteristics. The numerical outcomes are confirmed against existing solutions in the literature and exhibit excellent correlation, ensuring the validity and trustworthiness of the current results. The results reveal that the fluid temperature is improved by the increase in solid particle volume concentration, especially when there is an increase in NLTR. Thermal boundary layer growth is observed along with the development of the ESHS and electrodes and magnets parameter. Thus, these outcomes demonstrate the potential to fine-tune thermal performance. The study’s findings have far-reaching implications for applications in aerospace technology, electronic cooling systems, and advanced thermal barrier coatings.</p>

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Influence of nonlinear thermal radiation and exponential space dependent heat source on hybrid nanofluid stagnation point flow over a shrinking riga surface

  • 期刊论文

  • 发表日期：

    2025年2月12日

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  • Mohammed Zulfeqar Ahmed,
  • V. Dhanalaxmi,
  • Thirupathi Thumma

摘要

The intricate dynamics of exponential heat sources and thermal radiation have garnered significant attention in enhancing heat transfer efficiency in advanced fluid flow systems. When coupled with Electro-Magneto-Hydrodynamic (EMHD) effects, these mechanisms offer unparalleled control over thermal and flow characteristics, particularly in hybrid nanofluid systems that synergize the superior thermal properties of multiple nanoparticles. Such studies have practical relevance in designing energy-efficient cooling systems, high-precision thermal control in microfluidics, and aerospace thermal shields. With this motivation, this research explores the impact of nonlinear thermal radiation (NLTR) and an exponential space-dependent heat source (ESHS) on the stagnation point dynamics of hybrid nanofluid flow across a contracting Riga surface. The hybrid nanofluid, a blend of water, alumina, and copper oxide nanoparticles, is analyzed under the framework of the EMHD fluid flow model, incorporating linear first-order velocity slip and uniform surface temperature boundary conditions. Through the application of suitable similarity transformations, the nonlinear coupled partial differential equations are transformed into ordinary differential equations, enabling numerical analysis. Utilizing the Runge–Kutta algorithm coupled with the shooting procedure, the transformed equations are solved to unveil detailed insights into flow behavior and thermal characteristics. The numerical outcomes are confirmed against existing solutions in the literature and exhibit excellent correlation, ensuring the validity and trustworthiness of the current results. The results reveal that the fluid temperature is improved by the increase in solid particle volume concentration, especially when there is an increase in NLTR. Thermal boundary layer growth is observed along with the development of the ESHS and electrodes and magnets parameter. Thus, these outcomes demonstrate the potential to fine-tune thermal performance. The study’s findings have far-reaching implications for applications in aerospace technology, electronic cooling systems, and advanced thermal barrier coatings.