کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
767153 897156 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Natural convection on a vertical stretching cylinder
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Natural convection on a vertical stretching cylinder
چکیده انگلیسی

The flow and natural (or mixed) convection due to a vertical stretching cylinder is studied. Using similarity transforms, the Navier–Stokes and energy equations reduce to a set of nonlinear ordinary differential equations. Asymptotic analysis for large Reynolds numbers shows the relation between axisymmetric flow and two-dimensional flow. Due to the algebraic decay of the similarity functions, numerical integration is performed using a compressed coordinate. The axial velocity is composed of forced convection due to stretching and natural convection from the heated cylinder. The heat transfer increases with both the Reynolds number and the Prandtl number. The result is also a rare similarity solution of the free convection and Navier–Stokes equations.


► New stretching similarity solution for axisymmetric natural convection and Navier–Stokes equations is presented.
► The effect of cylinder curvature is of order R−1/2, where R is a Reynolds number.
► Due to algebraic decay, numerical integration is performed on a compressed radial variable.
► Thermal boundary layers exist for large Prandtl and Reynolds numbers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Communications in Nonlinear Science and Numerical Simulation - Volume 17, Issue 3, March 2012, Pages 1098–1103
نویسندگان
,