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Enhancement of Heat Transfer of Mixing Convection in a Vertical Channel by a Moving Block

Published online by Cambridge University Press:  08 February 2013

W.-S. Fu ,
J.-C. Huang ,
Y.-Y. Wang  and
Y. Huang
W.-S. Fu*
Affiliation:
Department of Mechanical Engineering, National Chiao Tung University Hsinchu, Taiwan 30010, R.O.C.
J.-C. Huang
Affiliation:
Department of Mechanical Engineering, National Chiao Tung University Hsinchu, Taiwan 30010, R.O.C.
Y.-Y. Wang
Affiliation:
Department of Mechanical Engineering, National Chiao Tung University Hsinchu, Taiwan 30010, R.O.C.
Y. Huang
Affiliation:
Department of Mechanical Engineering, National Chiao Tung University Hsinchu, Taiwan 30010, R.O.C.
*
*Corresponding author (wsfu@mail.nctu.edu.tw)
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Abstract

Enhancement of a heat transfer rate of mixed convection flow in a three-dimensional vertical channel with insertion of a moving slender block is investigated numerically. A slender block is installed along the direction of the channel flow, and the movement of the slender block is in periodic motion and transverse to the channel flow. The interaction between the moving block and the channel flow destroys and suppresses the velocity and thermal boundary layers on the heat surface periodically. Various ratios of the Richardson numbers (Gr/Re2) are simulated. The results show that under a higher velocity of the channel flow and a lower magnitude of Gr/Re2, the enhancement of heat transfer rate is better. Oppositely, under a lower velocity of the channel flow and a higher magnitude of Gr/Re2, the effect of natural convection driven by the buoyancy force is stronger and it is unfavorable to the heat transfer. A counter effect of the heat transfer rate is observed. These phenomena which are seldom analyzed before by numerical simulation are carried out in this study.

Keywords

Mixed convectionThree-dimensional channel flowEnhancement of heat transferMoving boundary
Type
Articles
Information
Journal of Mechanics , Volume 29 , Issue 1 , March 2013 , pp. 95 - 107
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2012

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References

REFERENCES

1. Najam, M., Amahmid, A., Hasnaoui, M. and Alami, M. El., “Unsteady Mixed Convection in a Horizontal Channel with Rectangular Blocks Periodically Distributed on its Lower Wall”, International Journal of Heat and Fluid Flow, 24, pp. 726–735 (2003).Google Scholar
2. Kitamura, K., Mototani, K. and Kimura, F., “Heat Transfer of Combined Forced and Natural Convection from Horizontal Cylinder to Air”, Heat Transfer, 36, pp. 474–488 (2007).Google Scholar
3. Gau, C.Yih, K. A. and Aung, W., “Reversed Flow Structure and Heat Transfer Measurements for Bouyancy Assisted Convection in a Heated Vertical Duct”, Journal of Heat Transfer, ASME, 114, No. 4, pp. 928–935 (1992).Google Scholar
4. Desrayaud, G. and Lauriat, G., “Flow Reversal of Laminar Mixed Convection in the Entry Region of Symmetrically Heated, Vertical Plate Channels”, International Journal of Thermal Sciences, 48, pp. 2036–2045 (2009).Google Scholar
5. Martinez-Suastegui, L. and Trevino, C., “Transient Laminar Opposing Mixed Convection in a Differentially and Asymmetrically Heated Vertical Channel of Finite Length”, International Journal of Heat and Mass Transfer, 51, pp. 5991–6005 (2008).Google Scholar
6. Joye, D. D., “Comparison of Correlations and Experiment in Opposing Flow, Mixed Convection Heat Transfer in a Vertical Tube with Grashorf Number Variation”, International Journal of Heat and Mass Transfer, 39, pp. 1033–1038 (1996).Google Scholar
7. Bergles, A. E., “Recent Development in Convective Heat Transfer Augmentation”, Applied. Mechanics Reviews, 26, pp. 675–682 (1973).Google Scholar
8. Bergles, A. E., “Survey and Evaluation of Techniques to Augment Convective Heat and MassTrandfer”, Heat Mass Transfer, 1, pp. 331–424 (1969).Google Scholar
9. Chen, X. and Sutton, W. H., “Enhancement of heat transfer: Combined Convection and Radiation in the Entrance Region of Circular Ducts with Porous Inserts”, International Journal of Heat and Mass Transfer, 48, pp. 5460–5474 (2005).Google Scholar
10. Yucel, N. and Guven, R. T., “Forced-convection Cooling Enhancement of Heated Elements in a Parallel-plate Channels Using Porous Inserts”, Numerical Heat Transfer A, 51, pp. 293–312(2007).Google Scholar
11. Gharebaghi, M. and Sezai, I., “Enhancement of Heat Transfer in Latent Heat Storage Modules with Internal Fins”, Numerical Heat Transfer A, 53, pp. 749–765 (2008).Google Scholar
12. Zeng, Y. and Vafai, K., “An Investigation of Convective Cooling of an Array of Channel-mounted Obstacles”, Numerical Heat Transfer A, 55, pp. 967–982 (2009).Google Scholar
13. Parthasarathy, P., Talukdar, P. and Kishore, V. R., “Enhancement of Heat Transfer with Porous/solid Insert for Laminar Flow of a Participating Gas in a 3-D Square Duct”, Numerical Heat Transfer A, 56, pp. 764–784 (2009).Google Scholar
14. Zhang, J. and Dalton, C., “Interaction of a Steady Approach Flow and a Circular Cylinder Undergoing Forced Ascillation”, Journal of Fluids Engineering, 119, pp. 808–813 (1997).Google Scholar
15. Zhu, C., Liang, H., Sun, D., Wang, L. and Zhang, Y., “Numerical Study of Interactions of Vortices Generated by Vortex Generators and Their Effects on Heat Transfer Enhancement”, Numerical Heat Transfer A, 50, pp. 345–360 (2006).Google Scholar
16. Jayavel, S. and Tiwari, S., “Numerical Study of Flow and Heat Transfer for Flow Past Inline Circular Tubes Built in a Rectangular Channel in the Presence of Vortex Generators”, Numerical Heat Transfer A, 54, pp. 777–797 (2008).Google Scholar
17. Chen, Y. Y., Song, K. W., Wang, L. B. and Sun, D. L., “Comparisons of Local Experimental Results of Heat Transfer Enhancement of a Flat Tube Bank Fun with Vortex Generators”, Numerical Heat Transfer A, 55, pp. 144–162 (2009).Google Scholar
18. Huang, T. M., Gau, C. and Aung, W., “Flow and Mixed Convection Heat Transfer in a Divergent Heated Vertical Channel”, Journal of Heat Transfer, ASME, 118, pp. 605–615 (1996).Google Scholar
19. Su, J. H., Gau, C. and Yang, C. S., “Enhancement of Heat Transfer over a Cylinder by Acoustic Excitation”, AIAA, Journal of Thermophysics and Heat Transfer, 20, pp. 256–266 (2006).Google Scholar
20. Gau, C., Wu, J. M. and Liang, C. Y., “Heat Transfer Enhancement and Vortex Flow Structure over a Heated Cylinder Oscillating in Crossflow Direction”, Journal of Heat Transfer, ASME, 121, pp.789–795 (1999).Google Scholar
21. Gau, C., Wu, S. X. and Su, H. S., “Synchronization of Vortex Shedding and Heat Transfer Enhancement over a Heated Cylinder Oscillating with Small Amplitude in Streamwise Direction”, Journal of Heat Transfer, ASME, 123, pp. 1139–1148 (2001).Google Scholar
22. Fu, W. S. and Tong, B. H., “Numerical Investigation of Heat Transfer Characteristics of the Heated Blocks in the Channel with a Transversely Oscillating Cylinder”, International Journal of Heat and Mass Transfer, 47, pp. 341–351 (2004).CrossRefGoogle Scholar
23. Li, J., “Numerical Approximation of Unsteady Natural Convection from a Vertical Flat Plate with a Surface Temperature Oscillation”, Numerical Heat Transfer A, 46, pp. 383–399 (2004).CrossRefGoogle Scholar
24. Fu, W. S. and Wang, K. N., “An Investigation of a Block Moving Back and Forth on a Heat Plate under a Slot Jet”, International Journal of Heat and Mass Transfer, 44, pp. 2621–2631 (2001).Google Scholar
25. Fu, W. S., Tseng, C. C., Wang, K. N. and Huang, C. P., “An Experimental Investigation of a Block Moving Back and Forth on a Heat plate under a Slot Jet”, International Journal of Heat and Mass Transfer, 50, pp. 3224–3233 (2007).Google Scholar
26. Briley, W. R., McDonald, H. and Shamroth, S. J., “At Low Mach Number Euler Formulation and Application to Time Iterative LBI Schemes”, AIAA, 21, pp. 1467–1469 (1983).Google Scholar
27. Turkel, E., “Preconditioned Methods for Solving the Incompressible and Low Speed Compressible Equations”, Journal of Computational Physics, 72, pp. 277–298 (1987).Google Scholar
28. Choi, D. and Merkel, C. L., “Application of Timeiterative Schemes to Incompressible Flow”, AIAA, 25, pp. 1518–1524 (1985).Google Scholar
29. Choi, D. and Merkel, C. L., “The Application of Preconditioning in Viscous Flows”, Journal of Computational Physics, 105, pp. 207–223 (1993).Google Scholar
30. Roe, P. L., “Approximation Riemann Solver, Parameter Vectors, and Difference Schemes”, Journal of Computational Physics, 43, pp. 357–372 (1981).Google Scholar
31. Weiss, J. M. and Smith, W. A., “Preconditioning Applied to Variable and Constants Density Flows”, AIAA, 33, pp. 2050–2056 (1995).Google Scholar
32. Peskin, C. S., “Flow Patterns Around Heart Valves: A Numerical Method”, Journal of Computational Physics, 10, pp. 252–271 (1972).Google Scholar
33. Trong, T. B., “A Parallel Finite-Volume Algorithm for Large-Eddy Simulation of Turbulence Flows”, Computers and Fluids, 29, pp. 877–915 (2000).Google Scholar
34. Yoon, S. and Jameson, S., “Lower-upper Symmetric-Gauss-Seidel Method for the Euler and Navier-Stokes Equations”, AIAA, 26, pp. 1025–1026 (1988).Google Scholar
35. Abalakin, I., Dervieux, A. and Kozubskaya, T., “A Vertex Centered High Order MUSCL Scheme Applying to Linearized Euler Acoustics”, INRIA, No4459 (2002).Google Scholar
36. Verzicco, R., Mohd-Yusof, J., Orlandi, P. and Haworth, D., “Les in Complex Geometries Using Boundary Body Forces”, AIAA, 38, pp. 427–433 (2000).Google Scholar
37. Grigoriadis, D. G. E., Bartzis, J. G. and Goulas, A., “LES of the Flow Past a Rectangular Cylinder Using a Immersed Boundary Concept”, International Journal for Numerical Methods in Fluids, 41, pp. 615–632 (2003).Google Scholar
38. Li, C. W. and Wang, L. L., “An Immersed Boundary Finite Difference Method for LES of Flow Around Bluff Shapes”, International Journal for Numerical Methods in Fluids, 46, pp. 85–107 (2004).Google Scholar
39. White, F. M., Viscous Fluid Flow, McGrawHill Co., Ltd., p. 113 (2006).Google Scholar