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September 10, 2025Physics of Fluids

Flow behavior and drag prediction for power-law fluids around rectangular cylinder: Effect of aspect ratio and Reynolds number

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Authors

GVGeeta VermaNational Institute of Technology DurgapurCBC. K. BhartiNational Institute of Technology DurgapurRBRabindra Nath BarmanNational Institute of Technology Durgapur

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Implication

Investigation shows the influence of aspect ratio and Reynolds number on drag coefficient and vorticity in non-Newtonian fluids.

Key Points

  • Maximum vorticity decreases by 67.55% at the leading edge as aspect ratio increases from 0.1 to 10 at low Reynolds number.
  • The drag coefficient exhibits complex dependencies on aspect ratio and power-law index, showing a maximum at α = 10 and n = 0.6.
  • Reattachment length diminishes by 86.76% with increasing aspect ratio for power-law index n = 0.6 at a Reynolds number of 20.
  • Regression analysis led to a predictive model for drag coefficient based on aspect ratio, power-law index, and Reynolds number.

Cite This Study

Verma et al. (2025) studied this question.

synapsesocial.com/papers/68c18f329b7b07f3a061568fhttps://doi.org/10.1063/5.0284756
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