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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 | ||
آمار تعداد مشاهده مقاله: 1,480 تعداد دریافت فایل اصل مقاله: 537 |