EFFECTS OF FLOW ROUTING PLATE ON MIXED CONVECTION HEAT TRANSFER FROM PROTRUDED HEAT SOURCES

Year 2017, Volume: 37 Issue: 2, 19 - 32, 31.10.2017

Burak Kurşun , Mecit Sivrioğlu

Abstract

In this study, the effect of the flow routing plates on the laminar mixed convection heat transfer in a horizontal channel that has protruded heat sources at the bottom and top surfaces were investigated numerically and experimentally. The air was used as the cooling fluid, and protruded heat sources were equipped as 4x8 rows into the rectangle channel that has insulated walls. The experimental study was applied for two different Reynolds (Re) numbers. A numerical model complying with the experimental results was created, and numerical investigations were performed in different Reynolds and modified Grashof (Gr*) numbers for the 0°, 30°, 60° values of the plate angles (α). The analyses showed that using flow routing plate only increases the heat transfer from the first four heater rows on the bottom surface, and the first and the last heater rows on the top surface. The findings obtained during the experimental and numerical studies were presented in detail as graphics showing the row averaged Nusselt number (Nurow ave.), the heater temperatures, velocity vectors, and temperature contours

Keywords

Flow routing plate, Horizontal channel

References

• Beig, S. A., Mirzakhalili, E. and Kowsari, F., 2011, Investigation of optimal position of a vortex generator in a blocked channel for heat transfer enhancement of electronic chips, International Journal of Heat and Mass Transfer, 54(19), 4317-4324.
• Chompookham, T., Thianpong, C. and Kwankaomeng, S., and Promvonge, P., 2010, Heat transfer augmentation in a wedge-ribbed channel using winglet vortex generators, International Communications in Heat and Mass Transfer, 37(2), 163-169.
• Davidson, A. S. L., 2001, Effect of inclined vortex generators on heat transfer enhancement in a three-dimensional channel Numerical Heat Transfer: Part A: Applications, 39(5), 433-448.
• FLUENT, A. 2011, Release 14.0, User Guide, Ansys. Inc., Lebanon, US.
• Fu, W. S., Ke, W. W. and Wang, K. N., 2001, Laminar forced convection in a channel with a moving block, International journal of heat and mass transfer, 44(13), 2385-2394.
• Fu, WS. and Tong, BH., 2004, 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(2), 341-351.
• Fu, W. S., Chen, C. J., Wang, Y. Y. and Huang, Y., 2012, Enhancement of mixed convection heat transfer in a three-dimensional horizontal channel flow by insertion of a moving block, International Communications in Heat and Mass Transfer, 39(1), 66-71.
• Kline, S. J., 1985, The purposes of uncertainty analysis, Journal of Fluids Engineering, 107(2), 153-160.
• Korichi, A., Oufer, L. and Polidori, G., 2009, Heat transfer enhancement in self-sustained oscillatory flow in a grooved channel with oblique plates, International Journal of Heat and Mass Transfer, 52(5), 1138-1148.
• Min, C., Qi, C., Wang, E., Tian, L. and Qin, Y., 2012, Numerical investigation of turbulent flow and heat transfer in a channel with novel longitudinal vortex generators, International Journal of Heat and Mass Transfer, 55(23), 7268-7277.
• Moffat, R. J., 1982, Contributions to the theory of single-sample uncertainty analysis. ASME, Transactions, Journal of Fluids Engineering, 104(2), 250-58.
• Myrum, T. A., Qiu, X. and Acharya, S., 1993, Heat transfer enhancement in a ribbed duct using vortex generators, International journal of heat and mass transfer, 36(14), 3497-3508.
• Oztop, H. F., Varol, Y. and Alnak, D. E., 2009, Control of heat transfer and fluid flow using a triangular bar in heated blocks located in a channel, International Communications in Heat and Mass Transfer, 36(8), 878-885.
• Perng, S. W. and Wu, H. W. 2008, Numerical investigation of mixed convective heat transfer for unsteady turbulent flow over heated blocks in a horizontal channel, International Journal of Thermal Sciences, 47(5), 620-632.
• Perng, S. W., Wu, H. W. and Jue, T. C., 2012, Numerical investigation of heat transfer enhancement on a porous vortex-generator applied to a block-heated channel, International Journal of Heat and Mass Transfer, 55(11), 3121-3137. Smith, R. E. and Wehofer, S., 1985, From measurement uncertainty to measurement communications, credibility, and cost control in propulsion ground test facilities. Journal of Fluids Engineering, 107(2), 165-172.
• Sohankar, A., 2007, Heat transfer augmentation in a rectangular channel with a vee-shaped vortex generator, International Journal of Heat and Fluid Flow, 28(2), 306-317.
• Sripattanapipat, S. and Promvonge, P., 2009, Numerical analysis of laminar heat transfer in a channel with diamond-shaped baffles, International Communications in Heat and Mass Transfer, 36(1), 32-38.
• Teamah, M. A., El-Maghlany, W. M. and Dawood, M. M. K., 2011, Numerical simulation of laminar forced convection in horizontal pipe partially or completely filled with porous material, International Journal of Thermal Sciences, 50(8), 1512-1522.
• Valencia, A., 1999, Heat transfer enhancement due to self-sustained oscillating transverse vortices in channels with periodically mounted rectangular bars, International Journal of Heat and Mass Transfer, 42(11), 2053-2062.
• Wu, J. M. and Tao, W. Q., 2008, Numerical study on laminar convection heat transfer in a rectangular channel with longitudinal vortex generator. Part A: Verification of field synergy principle, International Journal of Heat and Mass Transfer, 51(5), 1179-1191.
• Yang, S. J., 2002, A numerical investigation of heat transfer enhancement for electronic devices using an oscillating vortex generator. Numerical Heat Transfer: Part A: Applications, 42(3), 269-284.