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Research Papers: Heat Transfer Enhancement

A Numerical Investigation of Turbulent Flow and Heat Transfer in Rectangular Channels With Elliptic Scale-Roughened Walls

[+] Author and Article Information
Feng Zhou

e-mail: zhoufeng@ucla.edu

Ivan Catton

e-mail: catton@ucla.edu
Department of Mechanical and Aerospace Engineering,
University of California,
48-121 Engineering IV,
420 Westwood Plaza,
Los Angeles, CA 90095

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received July 1, 2012; final manuscript received April 16, 2013; published online June 27, 2013. Assoc. Editor: James A. Liburdy.

J. Heat Transfer 135(8), 081901 (Jun 27, 2013) (9 pages) Paper No: HT-12-1343; doi: 10.1115/1.4024278 History: Received July 01, 2012; Revised April 16, 2013

In the present paper, rectangular channels with six types of elliptic scale-roughened walls for heat transfer enhancement are numerically studied. Heat transfer and fluid flow characteristics for sixteen different scale-roughened models (with the scale height varying in the range from 1 mm to 2.5 mm) are numerically predicted using commercial computational fluid dynamics (CFD) code, Ansys cfx. The turbulent model employed is the k–ω based shear–stress transport (SST) model with automatic wall function treatment. In the performance evaluation, we use a “universal” porous media length scale based on volume averaging theory (VAT) to define the Reynolds number, Nusselt number, and friction factor. It is found that heat transfer performance is most favorable when the elliptic scales are oriented with their long axis perpendicular to the flow direction, while the scales elongated in the flow direction have lower Nusselt numbers and pressure drops compared with the circular scale-roughened channels. Results indicate that the scale-shaped roughness strongly spins the flow in the spanwise direction, which disrupts the near-wall boundary layers continuously and enhances the bulk flow mixing. With the flow marching in a more intense spiral pattern, a 40% improvement of heat transfer enhancement over the circular scale-roughened channels is observed.

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References

Ligrani, P. M., Oliveira, M. M., and Blaskovich, T., 2003, “Comparison of Heat Transfer Augmentation Techniques,” AIAA J., 41(3), pp. 337–362. [CrossRef]
Taslim, M. E., Li, T., and Kercher, D. M., 1996, “Experimental Heat Transfer and Friction in Channels Roughened With Angled, V-Shaped, and Discrete Ribs on Two Opposite Walls,” Trans. ASME J. Turbomach., 118(1), pp. 20–28. [CrossRef]
Han, J. C., Zhang, Y. M., and Lee, C. P., 1991, “Augmented Heat Transfer in Square Channels With Parallel, Crossed, and V-Shaped Angled Ribs,” ASME J. Heat Transfer, 113(3), pp. 590–596. [CrossRef]
Gao, X., and Sunden, B., 2001, “Heat Transfer and Pressure Drop Measurements in Rib-Roughened Rectangular Ducts,” Exp. Therm. Fluid Sci., 24(1–2), pp. 25–34. [CrossRef]
Park, J. S., Han, J. C., Huang, Y., Ou, S., and Boyle, R. J., 1992, “Heat Transfer Performance Comparisons of Five Different Rectangular Channels With Parallel Angled Ribs,” Int. J. Heat Mass Transfer, 35(11), pp. 2891–2903. [CrossRef]
Cho, H. H., Wu, S. J., and Kwon, H. J., 2000, “Local Heat/Mass Transfer Measurements in a Rectangular Duct With Discrete Ribs,” ASME J. Turbomach., 122(3), pp. 579–586. [CrossRef]
Park, K., Choi, D.-H., and Lee, K.-S., 2004, “Optimum Design of Plate Heat Exchanger With Staggered Pin Arrays,” Numer. Heat Transfer, Part A, 45(4), pp. 347–361. [CrossRef]
Khan, W. A., Culham, J. R., and Yovanovich, M. M., 2006, “The Role of Fin Geometry in Heat Sink Performance,” ASME J. Electron. Packag., 128(4), pp. 324–330. [CrossRef]
Zhou, F., and Catton, I., 2011, “Numerical Evaluation of Flow and Heat Transfer in Plate-Pin Fin Heat Sinks With Various Pin Cross-Sections,” Numer. Heat Transfer, Part A, 60(2), pp. 107–128. [CrossRef]
Mahmood, G. I., Hill, M. L., Nelson, D. L., Ligrani, P. M., Moon, H. K., and Glezer, B., 2001, “Local Heat Transfer and Flow Structure on and Above a Dimpled Surface in a Channel,” ASME J. Turbomach., 123(1), pp. 115–123. [CrossRef]
Mahmood, G. I., and Ligrani, P. M., 2002, “Heat Transfer in a Dimpled Channel: Combined Influences of Aspect Ratio, Temperature Ratio, Reynolds Number, and Flow Structure,” Int. J. Heat Mass Transfer, 45(10), pp. 2011–2020. [CrossRef]
Burgess, N. K., and Ligrani, P. M., 2005, “Effects of Dimple Depth on Channel Nusselt Numbers and Friction Factors,” ASME J. Heat Transfer, 127(8), pp. 839–847. [CrossRef]
Mahmood, G. I., Sabbagh, M. Z., and Ligrani, P. M., 2001, “Heat Transfer in a Channel With Dimples and Protrusions on Opposite Walls,” J. Thermophys. Heat Transfer, 15(3), pp. 275–283. [CrossRef]
Chang, S. W., Liou, T.-M., and Lu, M. H., 2005, “Heat Transfer of Rectangular Narrow Channel With Two Opposite Scale-Roughened Walls,” Int. J. Heat Mass Transfer, 48(19–20), pp. 3921–3931. [CrossRef]
Chang, S. W., Liou, T. M., Chiang, K. F., and Hong, G. F., 2008, “Heat Transfer and Pressure Drop in Rectangular Channel With Compound Roughness of V-Shaped Ribs and Deepened Scales,” Int. J. Heat Mass Transfer, 51(3–4), pp. 457–468. [CrossRef]
Chang, S. W., Yang, T. L., Liou, T.-M., and Fang, H. G., 2009, “Heat Transfer in Rotating Scale-Roughened Trapezoidal Duct at High Rotation Numbers,” Appl. Therm. Eng., 29(8–9), pp. 1682–1693. [CrossRef]
Chang, S. W., Yang, T. L., Liou, T.-M., and Hong, G. F., 2009, “Heat Transfer of Rotating Rectangular Duct With Compound Scaled Roughness and V-Ribs at High Rotation Numbers,” Int. J. Therm. Sci., 48(1), pp. 174–187. [CrossRef]
Chang, S. W., and Lees, A. W., 2010, “Endwall Heat Transfer and Pressure Drop in Scale-Roughened Pin-Fin Channels,” Int. J. Therm. Sci., 49(4), pp. 702–713. [CrossRef]
Zhou, F., DeMoulin, G. W., Geb, D. J., and Catton, I., 2012, “Closure for a Plane Fin Heat Sink With Scale-Roughened Surfaces for Volume Averaging Theory (VAT) Based Modeling,” Int. J. Heat Mass Transfer, 55(25–26), pp. 7677–7685. [CrossRef]
Bardina, J. E., Huang, P. G., and Coakley, T. J., 1997, “Turbulence Modeling Validation, Testing, and Development,” NASA Technical Memorandum.
Menter, F. R., 1994, “Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications,” AIAA J., 32(8), pp. 1598–1605. [CrossRef]
Menter, F. R., Kuntz, M., and Langtry, R., 2003, “Ten Years of Industrial Experience With the SST Turbulence Model,” Turbul. Heat Mass Transfer, 4, pp. 625–632.
Wee, H., Zhang, Q., Ligrani, P. M., and Narasimhan, S., 2008, “Numerical Predictions of Heat Transfer and Flow Characteristics of Heat Sinks With Ribbed and Dimpled Surfaces in Laminar Flow,” Numer. Heat Transfer, Part A, 53(11), pp. 1156–1175. [CrossRef]
Travkin, V. S., and Catton, I., 2001, “Transport Phenomena in Heterogeneous Media Based on Volume Averaging Theory,” Adv. Heat Transfer, 34, pp. 1–144. [CrossRef]
Whitaker, S., 1972, “Forced Convection Heat Transfer Correlations for Flow in Pipes, Past Flat Plates, Single Cylinders, Single Spheres, and for Flow in Packed Beds and Tube Bundles,” AIChE J., 18(2), pp. 361–371. [CrossRef]
Zhou, F., Hansen, N. E., Geb, D. J., and Catton, I., 2011, “Obtaining Closure for Fin-and-Tube Heat Exchanger Modeling Based on Volume Averaging Theory (VAT),” ASME J. Heat Transfer, 133(11), p. 111802. [CrossRef]
Catton, I., 2011, “Conjugate Heat Transfer Within a Heterogeneous Hierarchical Structure,” ASME J. Heat Transfer, 133(10), p. 103001. [CrossRef]
Geb, D., Zhou, F., and Catton, I., 2012, “Internal Heat Transfer Coefficient Determination in a Packed Bed From the Transient Response Due to Solid Phase Induction Heating,” ASME J. Heat Transfer, 134(4), p. 042604. [CrossRef]
Zhou, F., Hansen, N. E., Geb, D. J., and Catton, I., 2011, “Determination of the Number of Tube Rows to Obtain Closure for Volume Averaging Theory Based Model of Fin-and-Tube Heat Exchangers,” ASME J. Heat Transfer, 133(12), p. 121801. [CrossRef]
Zhou, F., and Catton, I., 2012, “Volume Averaging Theory (VAT) Based Modeling and Closure Evaluation for Fin-and-Tube Heat Exchangers,” Heat Mass Transfer, 48(10), pp. 1813–1823. [CrossRef]

Figures

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Fig. 1

Geometrical details of one of the elliptic scale-roughened surfaces

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Fig. 2

Print shapes of the elliptic scales

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Fig. 3

Computational domain. The length of the extended region was not drawn in scale.

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Fig. 4

Example of the grid system. Only part of the whole model is shown.

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Fig. 5

REV for a PFHS with scale-roughened surfaces

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Fig. 6

Validation of the present CFD simulation by comparing with experimental data by Chang et al. [14]

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Fig. 7

Nusselt number versus Reynolds number

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Fig. 8

Δp versus Reynolds number

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Fig. 9

Nusselt number versus scale height, ReDh = 10,000

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Fig. 10

Pressure drop versus scale height, ReDh = 10,000

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Fig. 11

Effectiveness factor versus Reynolds number

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Fig. 12

Streamlines on the planes normal to flow direction at Re = 10,000: (a) elliptic scale 2, Pt/Pl = 0.5; (b) circular scale, Pt/Pl = 1; and (c) elliptic scale 5, Pt/Pl = 2

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