Unconfined Unsteady Laminar Flow of a Power-Law Fluid across a Square Cylinder
AbstractThe flow of a non-Newtonian, power-law fluid, directed normally to a horizontal cylinder with square cross-section (two-dimensional flow) is considered in the present paper. The problem is investigated numerically with a very large calculation domain in order that the flow could be considered unconfined. The investigation covers the power-law index from 0.1 up to 2 and the Reynolds number ranges from 60 to 160. Over this range of Reynolds numbers the flow is unsteady. It is found that the drag coefficient and the Strouhal number are higher in a confined flow compared to those of an unconfined flow. In addition some flow characteristics are lost in a confined flow. Complete results for the drag coefficient and Strouhal number in the entire shear-thinning and shear-thickening region have been produced. In shear-thinning fluids chaotic structures exist which diminish at higher values of power-law index. This study represents the first investigation of unsteady, non-Newtonian power-law flow past a square cylinder in an unconfined field. View Full-Text
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Pantokratoras, A. Unconfined Unsteady Laminar Flow of a Power-Law Fluid across a Square Cylinder. Fluids 2016, 1, 37.
Pantokratoras A. Unconfined Unsteady Laminar Flow of a Power-Law Fluid across a Square Cylinder. Fluids. 2016; 1(4):37.Chicago/Turabian Style
Pantokratoras, Asterios. 2016. "Unconfined Unsteady Laminar Flow of a Power-Law Fluid across a Square Cylinder." Fluids 1, no. 4: 37.
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