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Effects of diameter ratio of adiabatic circular cylinder and tilt angle on natural convection from a square open tilted cavity

Saha, Sumon and Hussein, Ahmed Kadhim and Khan, Waqar and Mohammed, Hussein A. and Pakdee, Watit and Hasanpour, Arman (2012) Effects of diameter ratio of adiabatic circular cylinder and tilt angle on natural convection from a square open tilted cavity. Heat Transfer - Asian Research, 41 (5). pp. 388-401. ISSN 1099-2871

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Official URL: http://dx.doi.org/10.1002/htj.21001

Abstract

A numerical analysis is carried out to study the performance of natural convection inside a square open tilted cavity filled with air. An adiabatic circular solid cylinder is placed at the center of the cavity and the sidewall in front of the breathing space is heated by a constant heat flux. The top and bottom walls are kept at the ambient constant temperature. Two-dimensional forms of Navier–Stokes equations along with the energy equations are solved using the Galerkin finite element method. Results are obtained for a range of Grashof numbers from 103 to 106 at Pr = 0.71 while the tilt angle varies from 0 to 45° and the diameter ratio of the cylinder is considered to be 0.2, 0.3, and 0.4 with constant physical properties. The parametric studies for a wide range of cylinder diameter ratios and cavity tilt angles show significant features of the present problem in terms of stream functions and temperature profiles. The computational results indicate that the heat transfer coefficient is strongly influenced by the above governing parameters. It is also found that the average Nusselt number decreases when the diameter ratio increases.

Item Type:Article
Uncontrolled Keywords:Heat transfer
Subjects:Q Science > QC Physics
Divisions:Mechanical Engineering
ID Code:46886
Deposited By: Haliza Zainal
Deposited On:22 Jun 2015 13:56
Last Modified:26 Sep 2017 14:21

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