Numerical simulation of Laminar Free Convection Heat Transfer around Isothermal Concave and Convex Body Shapes

سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 97

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شناسه ملی سند علمی:

JR_JHMTR-2-2_004

تاریخ نمایه سازی: 24 شهریور 1403

چکیده مقاله:

In the present research, free convection heat transfer from isothermal concave and convex body shapes is studied numerically. The body shapes investigated here, are bi-sphere, cylinder, prolate and cylinder with hemispherical ends; besides, they have the same height over width (H/D = ۲). A Numerical simulation is implemented to obtain heat transfer and fluid flow from all of the geometries in a wide range of Rayleigh numbers. The results show that flatness, concavity and smoothness have major effects on estimation of free convection heat transfer. As the total surface heat transfer area changed by altering the geometry, the local Nusselt number are compared for these body shapes; as well; it shows that concave surfaces has adverse influence on transferring heat. In addition, the current results reveal the average Nusselt numbers based on square surface area are not affected by the geometries for the laminar range of Rayleigh numbers. Besides, “incompressible ideal gas model” is used for the variation of density in free convection heat transfer. This model has the capability to be utilized in the cases with high temperature differences between the fluid and the bodies’ surfaces.

نویسندگان

Sayed Mohammad Hashem Jayhooni

School of Mechanical Engineering, Shiraz University, Shiraz, Iran

Khosrow Jafarpur

School of Mechanical Engineering, Shiraz University, Shiraz, Iran.

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  • O.G. Martynenko, P.P. Khramtsov, Free-Convective Heat Transfer, Springer, Heidelberg, (۲۰۰۵) ...
  • M.J. Chamberlain, Free Convection Heat Transfer from a Sphere, Cube ...
  • E.M. Sparrow, A.J. Stretton, Natural convection from variously oriented cubes ...
  • M.M. Yovanovich, K. Jafarpur, Models of Laminar Natural Convection from ...
  • M. Eslami, K. Jafarpur, M.M. Yovanovich, Laminar Natural convection Heat ...
  • M. Eslami, K. Jafarpur, Laminar natural convection heat transfer from ...
  • M.M. Yovanovich, On the effect of shape, aspect ratio and ...
  • A.V. Hassani, K.G.T. Hollands, On natural convection heat transfer from ...
  • S. Lee, M.M. Yovanovich K. Jafarpur, Effects of geometry and ...
  • K. Jafarpur, Analytical and experimental study of laminar free convective ...
  • M. Eslami, K. Jafarpur, Laminar Free Convection Heat Transfer From ...
  • K. Kishinami, H. Saito, I. Tokura, An experimental study on ...
  • M. Kumari, I. Pop, H.S. Takhar, Free-convection boundary-layer flow of ...
  • E. Kim, Natural convection along a wavy vertical plate to ...
  • S.U. Rahman, Natural convection along vertical wavy surfaces: an experimental ...
  • J. Jer-Huan, Y. Wei-Mon, L. Hui-Chung, Natural convection heat and ...
  • J. Jer-Huan, Y. Wei-Mon, Transient analysis of heat and mass ...
  • Y. Lun-Shin, Natural convection along a vertical complex wavy surface, ...
  • I. Pop, T.Y. Na, Natural convection from a wavy cone, ...
  • I. Pop, T.Y. Na, Natural convection over a vertical wavy ...
  • M.A. Hossain , M.S. Munir, I. Pop, Natural convection flow ...
  • A. Rahman, M.M. Molla, M.M.A. Sarker, Natural convection flow along ...
  • J.M. Khubeiz, E. Radziemska, W.M. Lewandowski, Natural convective heat-transfers from ...
  • S.V. Patankar, Numerical Heat Transfer and Fluid Flow. Hemisphere, Washington ...
  • A.V. Hassani, An Investigation of Free Convection Heat Transfer from ...
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