USING OF FLOW ROUTING PLATE FOR COOLING OF PRINTED CIRCUIT BOARDS

Abstract

Effective cooling of electronic components plays an important role in system design and efficiency. In this study, the effects of using the flow routing plate in cooling printed circuit boards have been investigated. For this purpose, effects of the flow routing plate on the laminar mixed convection heat transfer from protruded heat sources at the side walls of the horizontal channel, were investigated numerically. The air was used as cooling fluid, and protruded heat sources were equipped as rows into the rectangular channel with insulated walls. Numerical investigations were carried out for different plate inclination angles at different Reynolds and modified Grashof numbers. It is observed that the using of flow routing plate increases the heat transfer at different ratios by comparison to the case without plate and enhances the cooling conditions for all values of parameters in the analyses. The highest heat transfer enhancement occurred at values where Reynolds number (Re) was Re = 1000 and plate inclination angle (α) was α = 60 °.The results obtained during the numerical analyses are presented in detail in the form of graphics for the row averaged Nusselt number, heater temperatures, velocity vectors, and temperature contours.

Keywords

• Horizontal channel,Flow routing plate,Mixed convection,Protruded heat sources

References

1. [1] Wu, H. W., & Perng, S. W. (1999). Effect of an oblique plate on the heat transfer enhancement of mixed convection over heated blocks in a horizontal channel. International Journal of Heat and Mass Transfer, 42(7), 1217–1235.
2. [2] Korichi, A., Oufer, L., & 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(5–6), 1138–1148.
3. [3] Sohankar, A., & Davidson, 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.
4. [4] 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.
5. [5] Alahyari Beig, S., Mirzakhalili, E., & 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(19–20), 4317–4324.
6. [6] Abdollahi, A., & Shams, M. (2015). Optimization of shape and angle of attack of winglet vortex generator in a rectangular channel for heat transfer enhancement. Applied Thermal Engineering, 81, 376–387.
7. [7]Caliskan, S. (2014). Experimental investigation of heat transfer in a channel with new winglet-type vortex generators. International Journal of Heat and Mass Transfer, 78, 604–614.
8. [8] Zhou, G., & Feng, Z. (2014). Experimental investigations of heat transfer enhancement by plane and curved winglet type vortex generators with punched holes. International Journal of Thermal Sciences, 78, 26–35.

9. [9] Chen, C., Teng, J. T., Cheng, C. H., Jin, S., Huang, S., Liu, C., Greif, R. (2014). A study on fluid flow and heat transfer in rectangular microchannels with various longitudinal vortex generators. International Journal of Heat and Mass Transfer, 69, 203–214.
10. [10] Xia, H. H., Tang, G. H., Shi, Y., & Tao, W. Q. (2014). Simulation of heat transfer enhancement by longitudinal vortex generators in dimple heat exchangers. Energy, 74(C), 27–36.
11. [11]Zdanski, P. S. B., Pauli, D., & Dauner, F. A. L. (2015). Effects of delta winglet vortex generators on flow of air over in-line tube bank: A new empirical correlation for heat transfer prediction. International Communications in Heat and Mass Transfer, 67, 89–96.
12. [12] Deshmukh, P. W., & Vedula, R. P. (2014). Heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with vortex generator inserts. International Journal of Heat and Mass Transfer, 79, 551–560.
13. [13] Li, H. Y., Chen, C. L., Chao, S. M., & Liang, G. F. (2013). Enhancing heat transfer in a plate-fin heat sink using delta winglet vortex generators. International Journal of Heat and Mass Transfer, 67, 666–677.
14. [14] Hatami, M., Ganji, D. D., & Gorji-Bandpy, M. (2015). Experimental investigations of diesel exhaust exergy recovery using delta winglet vortex generator heat exchanger. International Journal of Thermal Sciences, 93, 52–63.
15. [15] Gholami, A. A., Wahid, M. A., & Mohammed, H. A. (2014). Heat transfer enhancement and pressure drop for fin-and-tube compact heat exchangers with wavy rectangular winglet-type vortex generators. International Communications in Heat and Mass Transfer, 54, 132–140.
16. [16] ANSYS Fluent 14: User’s Guide, ANSYS Inc: Canonsburg, November 2011.
17. [17] Kurşun B. Akış yönlendirici plakaların çıkıntılı ısı kaynaklarından karışık konveksiyonla laminer ısı transferine etkisinin deneysel ve sayısal olarak incelenmesi. PhD Thesis, Gazi University: Ankara, November 2015.
18. [18] Dogan, A., Sivrioglu, M., & Baskaya, S. (2006). Investigation of mixed convection heat transfer in a horizontal channel with discrete heat sources at the top and at the bottom. International Journal of Heat and Mass Transfer, 49(15–16), 2652–2662.