Fractional-Order Williamson Fluid Flow with Slip and Cross-Diffusion Over a Variable-Thickness Sheet

Authors

  • Ravi S. Shah Department of Applied Science and Humanities, G H Patel College of Engineering and Technology, The Charutar Vidhyamandal University, V. V. Nagar, Gujarat, India https://orcid.org/0009-0001-4155-8954
  • Heenaben A. Raj Department of Applied Science and Humanities, G H Patel College of Engineering and Technology, The Charutar Vidhyamandal University, V. V. Nagar, Gujarat, India https://orcid.org/0000-0002-8694-9676
  • Gargi J. Trivedi Department of Applied Mathematics, Faculty of Technology and Engineering, The Maharaja Sayajirao University of Baroda, Baroda, Gujarat, India https://orcid.org/0000-0001-6597-1420

DOI:

https://doi.org/10.26713/cma.v16i3.3290

Keywords:

Fractional calculus, Williamson fluid, Heat and mass transfer, Slip conditions, Crank- Nicolson method, Soret and Dufour effects

Abstract

This study investigates heat and mass transfer in non-Newtonian Williamson fluid flow over a variable-thickness stretching sheet, incorporating Caputo fractional derivatives, velocity slip conditions, and Soret and Dufour effects. A fractional-order model captures memory effects, enhancing the representation of shear-thinning behavior and cross-diffusion phenomena. Governing equations are solved numerically using a hybrid Crank-Nicolson and spectral method, with stability and convergence rigorously analyzed. Results reveal that increasing the fractional order \((\alpha)\) from 0.1 to 0.9 yields a 300% increase in heat transfer rate (from 250 W/m\(^2\) to 1000 W/m\(^2\)) and a 53% reduction in thermal boundary layer thickness (from 0.015 m to 0.007 m). Slip conditions further reduce boundary layer thickness by 16%, while magnetic field and cross-diffusion effects amplify transfer rates by 43%. The model offers 20-30% improved accuracy over traditional approaches, with applications in polymer extrusion and biomedical microfluidics. Future work will explore variable material properties and multi-phase flows.

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References

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Published

30-10-2025
CITATION

How to Cite

Shah, R. S., Raj, H. A., & Trivedi, G. J. (2025). Fractional-Order Williamson Fluid Flow with Slip and Cross-Diffusion Over a Variable-Thickness Sheet. Communications in Mathematics and Applications, 16(3), 1035–1049. https://doi.org/10.26713/cma.v16i3.3290

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Research Article