کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7051313 1457272 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-modal instability of annular Poiseuille-Couette flow
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Non-modal instability of annular Poiseuille-Couette flow
چکیده انگلیسی
A non-modal stability analysis is presented for annular Poiseuille-Couette flow (APCF) which serves to complement existing linear and nonlinear stability studies. Modal linear stability analyses indicate a stabilizing trend for increasing inner cylinder velocity V, though this is at odds with experimental studies of transition such as Shands et al. (1980) who find that increasing V is destabilizing. Using the maximum achievable energy growth available at a given parameter regime as a measure of the non-modal stability of the flow, we also find that APCF is destabilized with increasing inner cylinder velocity V. Thus we conjecture that the transition mechanism in APCF is akin to that of the canonical subcritical shear flows, where linear instability of the base flow is not relevant.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - B/Fluids - Volume 53, September–October 2015, Pages 148-159
نویسندگان
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