Cooling Effect Efficiency Prediction of Aluminum Dimples Block using DOE Technique

  • Authors

    • Ganesan H. N
    • Kasim M. S
    • Izamshah R
    • Anand T.J. S
    • Hafiz M. S. A
    • Nawi M.A. M
    • Mohamed S. B
    2018-11-30
    https://doi.org/10.14419/ijet.v7i4.30.22094
  • Air Stream Velocity, Cooling Time, Dimples Structure, Heat Transfer Enhancement, Response Surface Methodology.

  • The main aim of the present work is to study the effect of heat enhancement method on the cooling process of a spherical dimple profile. It was prominently known that introducing dimples configuration causes an enhancement in heat transfer over a surface. In this project, an experimental investigation was carried out to examine the cooling effect of the spherical dimple profile during steady laminar flow in a wind tunnel. Seventeen different sets of parameters related to dimple diameter (mm), dimple orientation (angle) and air stream velocity (m/s) were studied. The Box-Behnken of Response Surface Methodology (RSM) was used as design of experiments (DoE) tool to evaluate these parameters on cooling time. This work deals with the analysis of variance (ANOVA) in order to establish the significant effect of input parameters. The result reveals that an increase in dimple diameter and air stream velocity increase heat dissipation. The shortest cooling time of 7 minutes can be achieved when the dimple diameter is 12 mm; the dimple orientation is 60° and air flow velocity at 18 m/s. The mathematical model has been rendered where the model has been experimentally validated with the average error of 6%.

  • References

    1. [1] Mahureand A & Kriplani V (2012), Review of heat transfer enhancement techniques. International Journal of Engineerin 5, 241-249.

      [2] Pisal HC & Ranaware AA (2012), Heat transfer enhancement by using dimpled surface. Journal of Mechanical and Civil Engineering (IOSR-JMCE) 6, 07-15.

      [3] Sheikholeslami M, Gorji BM & Ganji DD (2015), Review of heat transfer enhancement methods: focus on passive methods using swirl flow devices. Renewable and Sustainable Energy Reviews 49, 444-469.

      [4] Lake JP, King PI & Rivir RB (2000), Low Reynolds number loss reduction on turbine blades with dimples and V-grooves. AIAA Paper 00-738

      [5] Vorayos N, Katkhaw N, Kiatsiriroat T & Nuntaphan A (2016), Heat transfer behavior of flat plate having spherical dimpled surfaces. Case Studies in Thermal Engineering, 8, 370–377.

      [6] Bearman PW & Harvey JK (1976), Golf Ball Aerodynamics. Aeronautical Quarterly 27, 112-122.

      [7] Afanasyev VN, Chudnovsky YP, Leontiev AI & Roganov PS (1993), Turbulent flow friction and heat transfer characteristics for spherical cavities on a flat plate. Experimental Thermal and Fluid Science, 7, 1-8.

      [8] Beves CC, Barber TJ & Leonardi E (2004), An investigation of flow over two-dimensional circular cavity. In 15th Australasian Fluid Mechanics Conference, the University of Sydney, Australia, 13-17.

      [9] Zhang D, Zheng L, Xie G & Xie Y (2014), An experimental study on heat transfer enhancement of non-newtonian fluid in a rectangular channel with dimples/protrusions. Journal of Electronic Packaging 136, 021005-10.

      [10] Khalatov A, Byerley A, Ochoa D & Seong KIM (2004), Flow characteristics within and downstream of spherical and cylindrical dimple on a flat plate at low Reynolds numbers. Proceedings of ASME Turbo Expo, 1-13.

      [11] Ligrani PM, Harrison JL, Mahmmod GI & Hill ML (2001), Flow structure and local Nusselt number variations in a channel with dimples and protrusions on opposite walls. International Journal of Heat and Mass Transfer 44, 4413-4425.

      [12] Griffith TS, Al-hadhrami L & Han JC (2003), Heat transfer in rotating rectangular cooling channels (AR=4) with dimples. Journal of Turbomachinery 125.

      [13] Gadhave G & Kumar P (2012), Enhancement of forced convection heat transfer over dimple surface-review. International Multidisciplinary e – Journal 1, 51-57.

      [14] Katkhaw N, Vorayos A, Kiatsiriroat T, Khunatorn Y, Bunturat D & Nuntaphan A (2014), Heat transfer behavior of flat plate having 45 ellipsoidal dimpled surfaces. Case Studies in Thermal Engineering, 2, 67–74.

      [15] Alam AZMS, Islam MK, Mia MY & Rahman KA (2014), Simulation on heat transfer enhancement in a circular tube for laminar flow with and without insert. In: Proceedings of the International Conference on Mechanical Engineering and Renewable Energy, 1 -3

      [16] Hills R & Trucano T (1999), Statistical validation of engineering and scientific models: Background. Sandia National Laboratories, SAND99-1256.

      [17] Burgess NK, Oliveira MM & Ligrani PM (2003), Nusselt number behavior on deep dimpled surfaces within a channel. Journal of Heat Transfer 125, 11-18.

      [18] Bi C, Tang GH & Tao WQ (2013), Heat transfer enhancement in mini-channel heat sinks with dimples and cylindrical grooves. Applied Thermal Engineering 55, 121-132.

      [19] Khan A, Bellary MZ, Ziaullah M & Kaladgi AR (2015), An experimental study on heat transfer enhancement of flat plates using dimples. American Journal of Electrical Power and Energy Systems 4, 34-38.

  • Downloads

  • How to Cite

    N, G. H., S, K. M., R, I., S, A. T., A, H. M. S., M, N. M., & B, M. S. (2018). Cooling Effect Efficiency Prediction of Aluminum Dimples Block using DOE Technique. International Journal of Engineering & Technology, 7(4.30), 152-155. https://doi.org/10.14419/ijet.v7i4.30.22094