کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6421278 1631823 2014 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The slow, steady ascent of a hot solid sphere in a Newtonian fluid with strongly temperature-dependent viscosity
ترجمه فارسی عنوان
آهسته شدن، صعود مستمر یک کره جامد داغ در یک مایع نیوتنی با گرانروی به شدت دما
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
چکیده انگلیسی

In this paper, we revisit, both asymptotically and numerically, the problem of a hot buoyant spherical body with a no-slip surface ascending through a Newtonian fluid that has strongly temperature-dependent viscosity. Significant analytical progress is possible for four asymptotic regimes, in terms of two dimensionless parameters: the Péclet number, Pe, and a viscosity variation parameter, ∊. Severe viscosity variations lead to an involved asymptotic structure that was never previously adequately reconciled numerically; we achieve this with the help of a finite-element method. Both asymptotic and numerical results are also compared with those obtained recently for the case of a spherical body having a zero-traction surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematics and Computation - Volume 231, 15 March 2014, Pages 231-253
نویسندگان
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