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ARTICLE
NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER IN A PARALLELOGRAMIC ENCLOSURE HAVING AN INNER CIRCULAR CYLINDER USING LIQUID NANOFLUID
Hasan Sh. Majdia
, Ammar Abdulkadhimb,*
, Azher M. Abedb
a Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University College, Babylon, 51001, Iraq
b Air conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Babylon, 51001, Iraq
* Corresponding Author: Email:
Frontiers in Heat and Mass Transfer 2019, 12, 1-14. https://doi.org/10.5098/hmt.12.2
Abstract
Fluid flow and natural convection heat transfer in a parallelogram enclosure with an inner circular cylinder using Cu-water nanofluid are studied
numerically. Dimensionless Navier-Stokes and energy equations are solved numerically using finite element method based two-dimensional flow and
steady-state conditions. This study evaluates the effect of different concentrations of Cu-water nanofluids (0% to 6%) with different Rayleigh
numbers 10
3 ≤ Ra ≤ 10
6 under isotherm wall temperatures. The effects of geometrical parameters of the parallelogram enclosure (inclination angle in
range of 0 ≤ α ≤ 30 and location of inner circular cylinder -0.2 ≤ H ≤ +0.2 on the flow field and heat transfer are examined. The results are
presented in terms of streamlines, isotherms, local and average Nusselt number. It is found that the inclination angle has a significant effect on flow
pattern and heat transfer and the inclination angle of 30o at a vertical location H=-0.2 gives better fluid flow strength. Moreover, the maximum heat
transfer enhancement is obtained when the circular cylinder moves vertically downward up to H=-0.1 and the inclination angle is 30o
. The results
also indicate that as the Rayleigh number, nanofluid concentration increase, the rate of heat transfer will increase.
Keywords
Cite This Article
APA Style
Majdi
, H.S., Abdulkadhim
, A., Abed, A.M. (2019). NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER IN A PARALLELOGRAMIC ENCLOSURE HAVING AN INNER CIRCULAR CYLINDER USING LIQUID NANOFLUID. Frontiers in Heat and Mass Transfer, 12(1), 1-14. https://doi.org/10.5098/hmt.12.2
Vancouver Style
Majdi
HS, Abdulkadhim
A, Abed AM. NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER IN A PARALLELOGRAMIC ENCLOSURE HAVING AN INNER CIRCULAR CYLINDER USING LIQUID NANOFLUID. Front Heat Mass Transf. 2019;12(1):1-14 https://doi.org/10.5098/hmt.12.2
IEEE Style
H.S. Majdi
, A. Abdulkadhim
, and A.M. Abed "NUMERICAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER IN A PARALLELOGRAMIC ENCLOSURE HAVING AN INNER CIRCULAR CYLINDER USING LIQUID NANOFLUID," Front. Heat Mass Transf., vol. 12, no. 1, pp. 1-14. 2019. https://doi.org/10.5098/hmt.12.2