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بررسی ناپایداری جریان های دوبعدی موازی در سیالات ویسکوالاستیک با استفاده از روش های شبه طیفی | ||
| Journal of Algorithms and Computation | ||
| مقاله 4، دوره 43، شماره 1، تیر 2009، صفحه 31-37 اصل مقاله (276.51 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jac.2013.7672 | ||
| نویسندگان | ||
| Navid Khabbazi؛ Keyvan Sadeghi* | ||
| چکیده | ||
| In the present work, the effect of fluid’s elasticity was investigated on the hydrodynamic instability of Blasius flow. To determine the critical Reynolds number as a function of the elasticity number, a two-dimensional linear temporal stability analysis was invoked. The viscoelastic fluid is assumed to obey the Walters’ B fluid model for which base flow velocity profiles were fortunately available from literature. Neglecting terms nonlinear in the perturbation quantities, a Generalized Orr-Sommerfeld equation was obtained incorporating an elastic term. The eigenvalue problem so obtained was solved numerically using the Chebychev collocation-point method. Based on the results obtained in this work, fluid’s elasticity is predicted to have a destabilizing effect on the Blasius flow. | ||
| کلیدواژه‌ها | ||
| Hydrodynamic Instability؛ Elasticity Number؛ Critical Reynolds Number؛ Blasius Flow؛ Second Order Fluid؛ Non Newtonian Fluids | ||
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آمار تعداد مشاهده مقاله: 1,415 تعداد دریافت فایل اصل مقاله: 469 |
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