کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
768957 897364 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Accurate numerical simulations of vortex flows. I: Vortex breakdown
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Accurate numerical simulations of vortex flows. I: Vortex breakdown
چکیده انگلیسی

Vortex breakdown in uniform axial flow is investigated numerically by solving the Navier–Stokes equations using a hybrid spectral – finite difference method. Two Reynolds numbers and a high swirl number are considered with the lower Re-number resulting in axi-symmetric flow, that possesses an asymptotic state, and a higher Re-number, that leads to unsteady flow and a moderate spectral range. The structural properties of the vorticity field are analyzed in terms of vorticity lines and surfaces. A recirculation bubble and a wake emerge that undergo significant fluctuations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 41, Issue 1, February 2011, Pages 103–109
نویسندگان
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