The Impact of Nanoparticle Shape on the Bioconvection Flow Containing Magnetotactic Bacteria

Articles in Press

Document Type : Research Article

Author

Department of Mathematics, TED University, Ankara, Türkiye.

10.24200/sci.2026.68214.11039

Abstract

This study investigates the influence of nanoparticle shape on the bioconvection flow of a magnetite-water nanofluid containing magnetotactic bacteria in a curved cavity. The main aim is to examine how different nanoparticle shapes, which are spherical, brick, cylinder, platelet and blade, affect the heat and mass transfer characteristics alongside the swimming behavior of bacteria. The novelty of this research lies in the first-time analysis of nanoparticle shape impacts on bioconvection in a complex curved geometry, combined with the application of the radial basis function method to solve the nondimensional governing equations. Curve fitting is also employed to model the average Nusselt and Sherwood numbers as functions of nanoparticle shape and physical parameters. The results indicate that as Rayleigh number increases, spherical particles yield the highest increase in heat transfer  rate by 313.6%, while platelet-shaped particles reduce the mass transfer rate by 31.60%. Peclet numbers enhances the average density of bacteria for spherical nanoparticles by 14245%. As the amplitude of the wavy wall rises, the improvement in all average transport rates becomes more pronounced for platelet-shaped nanoparticles compared to other. By providing a high-accuracy predictive framework with a small mean squared error, this study establishes a practicle roadmap for engineers to select optimal particle shapes for bio-microfluidic design.

Keywords

Main Subjects

Scientia Iranica

Articles in Press, Accepted Manuscript
Available Online from 24 July 2026

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History

  • Receive Date: 22 November 2025
  • Revise Date: 12 May 2026
  • Accept Date: 30 May 2026

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