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Natural Convection Heat Transfer in Horizontal Concentric Annulus between Outer Cylinder and Inner Flat Tube

    Authors

    • Ahmed Ali Najeeb
    • Amer Jameel Shareef
    • Waleed Mohammed Abed
,
10.37649/aengs.2010.14222
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Abstract

Natural convection heat transfer in two-dimensional region formed by constant heat flux horizontal flat tube concentrically located in cooled horizontal cylinder studied numerically. The model solved using the FLUENT CFD package. The numerical simulations covered a range of hydraulic radius ratio (5, 7.5, and 10) at orientation angles from (0o up to 90o). The results showed that the average Nusselt number increases with hydraulic radius ratio, orientation angles and Rayleigh number. As well as enhancement ratio for Nusselt number at orientation angle 90o and hydraulic radius ratio 7.5 equal 24.87%. Both the fluid flow and heat transfer characteristics for different cases are illustrated velocity vectors and temperature contours that obtained from the CFD code. The results for the average Nusselt numbers are compared with previous works and show good agreement.

Keywords

  • Natural Convection
  • Horizontal Annulus
  • Flat Tube
  • aspect ratio
  • Orientation Angle
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Anbar Journal of Engineering Sciences
Volume 3, Issue 2
November 2010
Page 31-45
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  • PDF 997.81 K
History
  • Receive Date: 01 December 2010
  • Revise Date: 20 December 2010
  • Accept Date: 25 December 2010
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  • Article View: 307
  • PDF Download: 114

APA

Ali Najeeb, A., Jameel Shareef, A., & Mohammed Abed, W. (2010). Natural Convection Heat Transfer in Horizontal Concentric Annulus between Outer Cylinder and Inner Flat Tube. Anbar Journal of Engineering Sciences, 3(2), 31-45. doi: 10.37649/aengs.2010.14222

MLA

Ahmed Ali Najeeb; Amer Jameel Shareef; Waleed Mohammed Abed. "Natural Convection Heat Transfer in Horizontal Concentric Annulus between Outer Cylinder and Inner Flat Tube". Anbar Journal of Engineering Sciences, 3, 2, 2010, 31-45. doi: 10.37649/aengs.2010.14222

HARVARD

Ali Najeeb, A., Jameel Shareef, A., Mohammed Abed, W. (2010). 'Natural Convection Heat Transfer in Horizontal Concentric Annulus between Outer Cylinder and Inner Flat Tube', Anbar Journal of Engineering Sciences, 3(2), pp. 31-45. doi: 10.37649/aengs.2010.14222

VANCOUVER

Ali Najeeb, A., Jameel Shareef, A., Mohammed Abed, W. Natural Convection Heat Transfer in Horizontal Concentric Annulus between Outer Cylinder and Inner Flat Tube. Anbar Journal of Engineering Sciences, 2010; 3(2): 31-45. doi: 10.37649/aengs.2010.14222

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