Experimental Investigation of Surface Roughness Effect on Single Phase Fluid Flow and Heat Transfer in Micro-Tube

Authors: Mesbah. M. Salem, Mohamed. H. Elhsnawi, Saleh B. Mohamed

Abstract:

An experimental investigation was conducted to study the effect of surface roughness on friction factor and heat transfer characteristics in single-phase fluid flow in a stainless steel micro-tube having diameter of 0.85 mm and average internal surface roughness of 1.7 μm with relative surface roughness of 0.002. Distilled water and R134a liquids were used as the working fluids and testing was conducted with Reynolds numbers ranging from 100 to 10,000 covering laminar, transition and turbulent flow conditions. The experiments were conducted with the micro-tube oriented horizontally with uniform heat fluxes applied at the test section. The results indicated that the friction factor of both water and R134a can be predicted by the Hagen-Poiseuille equation for laminar flow and the modified Miller correlation for turbulent flow and early transition from laminar to turbulent flows. The heat transfer results of water and R134a were in good agreement with the conventional theory in the laminar flow region and lower than the Adam’s correlation for turbulent flow region which deviates from conventional theory.

Keywords: Pressure drop, heat transfer, distilled water, R134a, micro-tube, laminar and turbulent flow.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1087810

References:

[1] Velten, T., Heinrich Ruf, H., Barrow, D., Aspragathos, N., Lazarou, P., Jung, E., Khan, C., Richter, M., Kruckow, J., & Wackerle, M. (2005). Packaging of Bio-MEMS: Strategies Technologies, and Applications. IEEE Trans. Adv. Packag. 28(4): 533-546.
[2] Mudawar, I. (2000). Assessment of high -heat-flux thermal management schemes. Proceedings of the Seventh Intersociety Conference on Thermal and Themomechanical Phenomena in Electronic Systems.
[3] Morini, G.L. (2004). Laminar Liquid Flow Through Silicon Microchannels. J. Fluids Eng., Transactions of the ASME. 126(3): 485- 489.
[4] Morini, G.L. (2004). Single-phase Convective Heat Transfer in Microchannels: a Review of Experimental Results. Int. J. Therm. Sci. 43(7), 631-651.
[5] Qu, W., Mala, G.M. & Li, D.(2000). Heat transfer for water flow in trapezoidal silicon micro-channels. Int. J. Heat Mass Transfer, 43(21), 3925-3936.
[6] Toh, K.C., Chen, X. Y., & Chai, J.C. (2002). Numerical computation of fluid flow and heat transfer in micro-channels. Int. J. Heat Mass Transfer, 45, 5133-5141.
[7] Xu, B., K.T. Ooi, C. Mavriplis & Zaghloul, M.E. (2003). Evaluation of viscous dissipation in liquid flow in micro-channels. Journal of Microchannels and Micro-engineering,. 13, 53-57.
[8] Kandlikar, S.G., Joshi, S. & Tian, S. (2001). Effect of channel roughness on heat transfer and fluid flow characteristics at low Reynolds numbers in small diameter tubes. Proceedings of NHTC’01-35th National Heat Transfer Conference, Anaheim CA, USA, paper 12134.
[9] Sharp, K.V. (2001). Experimental investigation of liquid and particleladen flows in micro-tubes. Thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Theoretical and Applied Mechanics in the Graduate College of the University of Illinois at Urbana-Champaign, Urbana, Illinois.
[10] Sharp, K.V. & Adrian, R. J. (2004). Transition from Laminar to Turbulent Flow in Liquid Filled Micro-tubes. Exp. Fluids, 36, 741-747.
[11] i, Z.X., Du, D. X. & Guo, Z.Y. (2003). Experimental study on flow characteristics of liquid in circular micro-tubes. Micro-scale Thermophys. Eng., 7(3), 253-265.
[12] Phares, D.J. & Smedley G.T., (2004). Study of laminar flow of polar liquid through circular micro-tubes. International Phys Fluid, 16(3), 1267-1272.
[13] Celata, G.P., Cumo, M., McPhail, S. & Zummo, G. (2006). Characterization of fluid dynamic behavior and channel wall effects in micro-tube. Int. J. Heat Fluid Flow, 27, 135-143.
[14] Zhao. I. & Liu, Z., (2006). Experimental studies on flow visualization and heat transfer characteristics in microtubes. 13th International Heat Transfer Conference. MIC-12: Sydney.
[15] Rahman M.M, (2000). Measurements of heat transfer in micro-channel heat sink. Int. Commun. Heat Mass. 27, 495-506.
[16] Celata, G.P., Cumo, M., Guglielmi, M. & Zummo G. (2002). Experimental investigation of hydraulic and single-phase heat transfer in 0.130-MM capillary tube. Nanoscale Micro-scale Thermophys. Eng. 6(2), 85-97.
[17] Kandlikar, S.G., Joshi S. & Tian S. (2003). Effect of surface roughness on heat transfer and fluid flow characteristics at low Reynolds number in small diameter tubes. Heat Transfer Eng. 24, 4-16.
[18] Kandlikar, S.G., Schmitt, D., Carano, A. L.& Taylor, J. B. (2005). Characterization of surface roughness effects on pressure drop in singlephase flow in minichannels, Phys. Fluids, 17, 100606-(1-11).
[19] Adams, T.M., Abdel-Khalik, S. I., Jeter, M. & Qureshi, Z. H. (1997). An Experimental investigation of single-phase forced convection in microchannels, Int. J. Heat Mass Transfer, 41(6-7), 851-857.
[20] Yang,C.-Y. & Lin,T.-Y. (2007). Heat transfer characteristics of water flow in microtubes, Exp. Therm Flu sci., 32, 432-439.