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Journal of Applied Fluid Mechanics، جلد ۹، شماره ۲، صفحات ۶۲۵-۶۳۳
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عنوان انگلیسی Obstacle Geometry Effect on the Stability of Two-Dimensional Incompressible Flow in a Channel
چکیده انگلیسی مقاله Two-dimensional incompressible fluid flow around a rectangular shape placed over a larger rectangular shape is analyzed numerically. The vortex shedding is investigated at different arrangements of the two shapes. The calculations are carried out for several values of Reynolds numbers from low values up to 52. At low Reynolds number, the flow remains steady. The flow characteristics are analyzed for each configuration. The analysis of the flow evolution shows that with increasing Re beyond a certain critical value, the flow becomes unstable and undergoes a bifurcation. It is observed that the transition to unsteady regime is performed by a Hopf bifurcation. The critical Reynolds number beyond which the flow becomes unsteady is determined for each configuration.
کلیدواژه‌های انگلیسی مقاله Incompressible fluid flow, obstacle, Von Karman vortex street, Finite, volume method, Critical Reynolds Number
نویسندگان مقاله S. Fezai |
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of fluid Mechanics, physics department, 2092, Tunis, Tunisia.

N. Ben-Cheikh |
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of fluid Mechanics, physics department, 2092, Tunis, Tunisia.

B. Ben-Beya |
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of fluid Mechanics, physics department, 2092, Tunis, Tunisia.

T. Lili |
University of Tunis El Manar, Faculty of Sciences of Tunis, Laboratory of fluid Mechanics, physics department, 2092, Tunis, Tunisia.

نشانی اینترنتی https://www.jafmonline.net/article_1643_e0ae5cf453532ffb8b04eb6dd45787f1.pdf
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