Steady flow of a power-law non-Newtonian fluid across an unconfined square cylinder
- Авторы: Pantokratoras A.1
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Учреждения:
- School of Engineering
- Выпуск: Том 57, № 2 (2016)
- Страницы: 264-274
- Раздел: Article
- URL: https://journals.rcsi.science/0021-8944/article/view/159145
- DOI: https://doi.org/10.1134/S0021894416020097
- ID: 159145
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Аннотация
A two-dimensional flow of a non-Newtonian power-law fluid directed normally to a horizontal cylinder with a square cross section is considered in the present paper. The problem is investigated numerically with a finite volume method by using the commercial code Ansys Fluent with a very large computational domain so that the flow could be considered unbounded. The investigation covers the power-law index from 0.1 to 2.0 and the Reynolds number range from 0.001 to 45.000. It is found that the drag coefficient for low Reynolds numbers and low power-law index (n ≤ 0.5) obeys the relationship CD = A/Re. An equation for the quantity A as a function of the power-law index is derived. The drag coefficient becomes almost independent of the power-law index at high Reynolds numbers and the wake length changes nonlinearly with the Reynolds number and power-law index.
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Об авторах
A. Pantokratoras
School of Engineering
Автор, ответственный за переписку.
Email: apantokr@civil.duth.gr
Греция, Xanthi, 67100