|تعداد مشاهده مقاله||2,477,425|
|تعداد دریافت فایل اصل مقاله||1,746,076|
|Journal of Computational & Applied Research in Mechanical Engineering (JCARME)|
|مقاله 3، دوره 9، شماره 1 - شماره پیاپی 17، آذر 2019، صفحه 33-45 اصل مقاله (1.66 M)|
|نوع مقاله: Research Paper|
|شناسه دیجیتال (DOI): 10.22061/jcarme.2019.2716.1274|
|S. Harimi؛ Azam Marjani*|
|Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran|
|تاریخ دریافت: 01 تیر 1396، تاریخ بازنگری: 30 بهمن 1397، تاریخ پذیرش: 06 اسفند 1397|
|The present work deals with heat transfer characteristics as well as fluid flow patterns in laminar flow regime for a circular cylinder with six control rods arranged in equilateral triangular geometries. The computations have been carried out by a finite volume approach using the overset grid method. The unsteady flow at Re= 200 and Pr= 0.7 and 7.0 was examined. The effect of the control rods on suppression of the fluid forces applied on a main cylinder has been investigated by numerical solution of the Navier-Stokes equations. Based on the results obtained, the arrangement employed in this study indicated the significant performance in reducing the oscillatory force coefficients of the primary cylinder. Except for some gap ratios, it is indicated that both drag and lift coefﬁcients are much lower than that for a single cylinder. Moreover, forced convection heat transfer was calculated using local and mean Nusselt numbers at the surface of the cylinders. The instantaneous streamlines, the vortices and isothermal contours were presented in order to analyze the temperature field and flow field around the cylinders.|
|Control rod؛ Equilateral triangular؛ Vortex street؛ heat transfer؛ Overset grid method|
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