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IJERT-EMS

Numerical Study of Flow and Heat Transfer in Circular Tube With Almond Shape Dimple


Numerical Study of Flow and Heat Transfer in Circular Tube With Almond Shape Dimple
Authors : Pooja Patil, Padmakar Deshmukh
Publication Date: 31-07-2014

Authors

Author(s):  Pooja Patil, Padmakar Deshmukh

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Vol. 3 - Issue 8 (August - 2014)

e-ISSN:   2278-0181

Abstract

This paper presents Computational investigation of convective heat transfer in turbulent flow past an almond shape dimpled surface. A parametric study is performed with k-ε turbulence model to determine the effects of Reynolds number of range 25000 to 95000 on heat transfer enhancement. In this paper we have computed heat transfer characteristics in a circular tube as a function of the Reynolds number. The mass flow rate of air varied for getting turbulent flow Reynolds numbers. The almond shape dimple geometry was considered with diameter 10 mm and required elongated length 22.5mm. The tube diameter 19mm and dimple depth 3mm with ratio L/D =4.3 was kept constant. . The results showed that more heat transfer was occurred downstream of the dimples due to flow reattachment. As the Reynolds number increased, the overall heat transfer coefficient was also increased as compared with base line plain tube with minimum pressure drop penalty.

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