Computational fluid dynamics (CFD) and heat transfer simulations are conducted for a novel heat exchanger. The heat exchanger consists of semi-circle cross-sectioned tubes that create narrow slots oriented in the streamwise direction. Numerical simulations are conducted for Reynolds numbers (Re) ranging from 700 to 30,000. Three-dimensional turbulent flows and heat transfer characteristics in the tube bank region are modeled by the k-ε Reynolds-averaged Navier–Stokes (RANS) method. The flow structure predicted by the two-dimensional and three-dimensional simulations is compared against that observed by the particle image velocimetry (PIV) for Re of 1500 and 4000. The adequate agreement between the predicted and observed flow characteristics validates the numerical method and the turbulent model employed here. The three-dimensional and the two-dimensional steady flow simulations are compared to determine the effects of the wall on the flow structure. The wall influences the spatial structure of the vortices formed in the wake of the tubes and near the exit of the slots. The heat transfer coefficient of the slotted tubes improved by more than 40% compare to the traditional nonslotted tubes.
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Computational Fluid Dynamics and Heat Transfer Analysis for a Novel Heat Exchanger
Haolin Ma,
Haolin Ma
Department of Mechanical Engineering and Mechanics,
e-mail: ham310@lehigh.edu
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: ham310@lehigh.edu
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Dennis E. Oztekin,
Dennis E. Oztekin
Mem. ASME
Department of Mechanical Engineering and Mechanics,
e-mail: deo308@lehigh.edu
Department of Mechanical Engineering and Mechanics,
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: deo308@lehigh.edu
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Seyfettin Bayraktar,
Seyfettin Bayraktar
Department of Naval Architecture
and Marine Engineering,
e-mail: sbay@yildiz.edu.tr
and Marine Engineering,
Yildiz Technical University
,Besiktas-Istanbul 34349
, Turkey
e-mail: sbay@yildiz.edu.tr
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Sedat Yayla,
Sedat Yayla
Department of Mechanical Engineering,
e-mail: syayla@yyu.edu.tr
Yuzuncu Yil University
,Van 65080,
Turkey
e-mail: syayla@yyu.edu.tr
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Alparslan Oztekin
Alparslan Oztekin
1
Mem. ASME
Department of Mechanical Engineering and Mechanics,
e-mail: alo2@lehigh.edu
Department of Mechanical Engineering and Mechanics,
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: alo2@lehigh.edu
1Corresponding author.
Search for other works by this author on:
Haolin Ma
Department of Mechanical Engineering and Mechanics,
e-mail: ham310@lehigh.edu
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: ham310@lehigh.edu
Dennis E. Oztekin
Mem. ASME
Department of Mechanical Engineering and Mechanics,
e-mail: deo308@lehigh.edu
Department of Mechanical Engineering and Mechanics,
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: deo308@lehigh.edu
Seyfettin Bayraktar
Department of Naval Architecture
and Marine Engineering,
e-mail: sbay@yildiz.edu.tr
and Marine Engineering,
Yildiz Technical University
,Besiktas-Istanbul 34349
, Turkey
e-mail: sbay@yildiz.edu.tr
Sedat Yayla
Department of Mechanical Engineering,
e-mail: syayla@yyu.edu.tr
Yuzuncu Yil University
,Van 65080,
Turkey
e-mail: syayla@yyu.edu.tr
Alparslan Oztekin
Mem. ASME
Department of Mechanical Engineering and Mechanics,
e-mail: alo2@lehigh.edu
Department of Mechanical Engineering and Mechanics,
Lehigh University
,Packard Lab #356
,Bethlehem, PA 18015
e-mail: alo2@lehigh.edu
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received June 19, 2014; final manuscript received February 1, 2015; published online March 3, 2015. Assoc. Editor: Danesh / D. K. Tafti.
J. Heat Transfer. May 2015, 137(5): 051801 (11 pages)
Published Online: May 1, 2015
Article history
Received:
June 19, 2014
Revision Received:
February 1, 2015
Online:
March 3, 2015
Citation
Ma, H., Oztekin, D. E., Bayraktar, S., Yayla, S., and Oztekin, A. (May 1, 2015). "Computational Fluid Dynamics and Heat Transfer Analysis for a Novel Heat Exchanger." ASME. J. Heat Transfer. May 2015; 137(5): 051801. https://doi.org/10.1115/1.4029764
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