Effect of Flow Attack Angle on Heat Transfer, Friction Loss and Thermal Performance in Square Channel with Inclined Wavy Surface

Authors

  • Amnart Boonloi
  • Withada Jedsadaratanachai

Keywords:

wavy surface, heat transfer, thermal performance, Nusselt number, square channel

Abstract

Effects of flow attack angles for inclined wavy surface on heat transfer rate, friction loss and thermal performance in a square channel are investigated numerically. The inclined wavy surface with square profile is inserted in the middle of the square channel to increase heat transfer rate and performance. The current study is solved by finite volume method with SIMPLE algorithm. The convective heat transfer in turbulent regime, Re = 3000 – 10,000, is considered. The flow structure and heat transfer behavior in the test section are presented in the numerical results. The thermal performance is also analyzed in terms of Nusselt number ratio (Nu/Nu0), friction factor ratio (f/f0) and thermal enhancement factor (TEF). The maximum heat transfer rate is detected at the flow attack angle of 45o, while the extreme pressure loss is found at the flow attack angle of 60o. The optimum TEF are found at the flow attack angle of 30o and 45o around 1.9.   

References

H. Alipour, A. Karimipour, M.R. Safaei, D.T. Semiromi and O.A. Akbari, “Influence of T-semi attached rib on turbulent flow and heat transfer parameters of a silver-water nanofluidwith different volume fractions in a three-dimensional rapezoidal microchannelâ€, Physica E: Low-dimensional Systems and Nanostructures, Elsevier, vol. 88, pp. 60-76, 2017.

A. Behnampour, O.A. Akbari, M.R. Safaei, M. Ghavami and R. Mashayekhi, “Analysis of heat transfer and nanofluid fluid flow in microchannels with trapezoidal, rectangular andtriangular shaped ribsâ€, Physica E: Low-dimensional Systems and Nanostructures, Elsevier, vol. 91, pp. 15-31, 2017.

W. Jedsadaratanachai, S. Suwannapan and P. Promvonge, “Numerical Study of Laminar Heat Transfer in Baffled Square Channel with Various Pitchesâ€, Energy Procedia, Elsevier, vol. 9, pp. 630-642, 2011.

S. Kwankaomeng and P. Promvonge, “Numerical prediction on laminar heat transfer in square duct with 30o angled baffle on one wallâ€, International Communications in Heat and Mass Transfer, Elsevier, vol. 37(7), pp. 857-866, 2010.

P. Promvonge, W. Jedsadaratanachai and S. Kwankaomeng, “Numerical study of laminar flow and heat transfer in square channel with 30° inline angled baffle turbulatorsâ€, Applied Thermal Engineering, Elsevier, vol. 30(11-12), pp. 1292-1303, 2010.

P. Promvonge, S. Sripattanapipat and S. Kwankaomeng, “Laminar periodic flow and heat transfer in square channel with 45° inline baffles on two opposite wallsâ€, International Journal of Thermal Sciences, Elsevier, vol. 49(6), pp. 963-975, 2010.

B. Lotfi, M. Zeng, B. Sundén and Q. Wang, “3D numerical investigation of flow and heat transfer characteristics in smooth wavy fin-and-elliptical tube heat exchangers using new type vortex generatorsâ€, Energy, Elsevier, vol. 73, pp. 233-257, 2014.

J. Dong, L. Su, Q. Chen and W. Xu, “Experimental study on thermal–hydraulic performance of a wavy fin-and-flat tube aluminum heat exchangerâ€, Applied Thermal Engineering, Elsevier, vol. 51(1-2), pp. 32-39, 2013.

J. Dong, J. Chen, W. Zhang and J. Hu, “Experimental and numerical investigation of thermal -hydraulic performance in wavy fin-and-flat tube heat exchangersâ€, Applied Thermal Engineering, Elsevier, vol. 30(11-12), pp. 1377-1386, 2010.

J. Gong, C. Min, C. Qi, E. Wang and L. Tian, “Numerical simulation of flow and heat transfer characteristics in wavy fin-and-tube heat exchanger with combined longitudinal vortex generatorsâ€, International Communications in Heat and Mass Transfer, Elsevier, vol. 43, pp. 53-56, 2013.

X. Du, L. Feng, L. Li, L. Yang and Y. Yang, “Heat transfer enhancement of wavy finned flat tube by punched longitudinal vortex generatorsâ€, International Journal of Heat and Mass Transfer, Elsevier, vol. 75, pp. 368-380, 2014.

X. Du, L. Feng, Y. Yang and L. Yang, “Experimental study on heat transfer enhancement of wavy finned flat tube with longitudinal vortex generatorsâ€, Applied Thermal Engineering, Elsevier, vol. 50(1), pp. 55-62, 2013.

F. Incropera and P.D. Dewitt, “ Introduction to Heat Transfer, 5th ed.â€, John Wiley & Sons, 2006.

Downloads

Published

2017-08-28

How to Cite

Boonloi, A., & Jedsadaratanachai, W. (2017). Effect of Flow Attack Angle on Heat Transfer, Friction Loss and Thermal Performance in Square Channel with Inclined Wavy Surface. Asian Journal of Applied Sciences, 5(4). Retrieved from https://www.ajouronline.com/index.php/AJAS/article/view/4885

Issue

Section

Articles