Natural and Mixed Convection Heat Transfer Cooling of Discrete Heat Sources Placed Near the Bottom on a PCB
Steady state experiments have been conducted for
natural and mixed convection heat transfer, from five different sized
protruding discrete heat sources, placed at the bottom position on a
PCB and mounted on a vertical channel. The characteristic length (
Lh ) of heat sources vary from 0.005 to 0.011 m. The study has been
done for different range of Reynolds number and modified Grashof
number. From the experiment, the surface temperature distribution
and the Nusselt number of discrete heat sources have been obtained
and the effects of Reynold number and Richardson number on them
have been discussed. The objective is to find the rate of heat
dissipation from heat sources, by placing them at the bottom position
on a PCB and to compare both modes of cooling of heat sources.
[1] S. Baskaya, U. Erturhan, and M. Sivrioglu, "An experimental study on
convection heat transfer from an array of discrete heat sources",
.International Communications in Heat and Mass Transfer, 32 (1-2):
248- 257, 2005.
[2] H. Bhowmik, CP Tso, and KW Tou, "Analyses of convection heat
transfer from discrete heat sources in a vertical rectangular channel",
Journal of Electronic Packaging, 127: 215, 2005.
[3] CY Choi and SJ Kim, "Conjugate mixed convection in a channel:
modified five percent deviation rule", International Journal of Heat
and Mass Transfer, 39 (6):1223 - 1234, 1996.
[4] P.T.J.R. Culham and MM Yovanovich, "Comprehensive review of
natural and mixed convection heat transfer models for circuit board
arrays", Journal of Electronics Manufacturing, 7 (2):79-92, 1997.
[5] IA Ermolaev and AI Zhbanov, "Mixed convection in a horizontal
channel with local heating from below", Fluid Dynamics, (1):29-35,
2004.
[6] B. Ghasemi and S.M. Aminossadati, "Numerical simulation of mixed
convection in a rectangular enclosure with different numbers and
arrangements of discrete heat sources", Arabian Journal for Science
and Engineering, 33 (1):189, 2008.
[7] G.G. Kumar and C.G. Rao, "Interaction of surface radiation with
conjugate mixed convection from a vertical plate with multiple non
identical discrete heat sources", Chemical Engineering
Communications, 198 (5): 692-710, 2011.
[8] La Pica, G. Rodonn, and R. Volpes, "An experimental investigation on
natural convection of air in a vertical channel", International Journal of
Heat and Mass Transfer, 36 (3):611-616, 1993.
[9] S. Lee, JR Culham, and MM Yovanovich, "Parametric investigation of
conjugate heat transfer from microelectronic circuit boards under
mixed convection cooling", International electronic packaging
conference, San Diego, September, pages 15 - 19, 1991.
[10] G.M. Rao and G. Narasimham, "Laminar conjugate mixed convection
in a vertical channel with heat generating components", International
Journal of Heat and Mass Transfer, 50 (17-18):3561-3574, 2007.
[11] SM Sawant and C. Gururaja Rao, "Conjugate mixed convection with
surface radiation from a vertical electronic board with multiple discrete
heat sources", Heat and Mass Transfer, 44 (12):1485-1495, 2008.
[12] H. Turkoglu and N. Yucel, "Mixed convection in vertical channels with
a discrete heat source", Heat and Mass Transfer, 30 (3):159-166, 1995.
[13] T.V.V. Sudhakar, A. Shori, C. Balaji, and S.P. Venkateshan.,"Optimal
heat distribution among discrete protruding heat sources in a vertical
duct: A combined numerical and experimental study", Journal of Heat
Transfer, 132 : 011401, 2010.
[14] S. P. Venkateshan, "Mechanical Mesurements", Ane Books, New Delhi,
India, 2008.
[1] S. Baskaya, U. Erturhan, and M. Sivrioglu, "An experimental study on
convection heat transfer from an array of discrete heat sources",
.International Communications in Heat and Mass Transfer, 32 (1-2):
248- 257, 2005.
[2] H. Bhowmik, CP Tso, and KW Tou, "Analyses of convection heat
transfer from discrete heat sources in a vertical rectangular channel",
Journal of Electronic Packaging, 127: 215, 2005.
[3] CY Choi and SJ Kim, "Conjugate mixed convection in a channel:
modified five percent deviation rule", International Journal of Heat
and Mass Transfer, 39 (6):1223 - 1234, 1996.
[4] P.T.J.R. Culham and MM Yovanovich, "Comprehensive review of
natural and mixed convection heat transfer models for circuit board
arrays", Journal of Electronics Manufacturing, 7 (2):79-92, 1997.
[5] IA Ermolaev and AI Zhbanov, "Mixed convection in a horizontal
channel with local heating from below", Fluid Dynamics, (1):29-35,
2004.
[6] B. Ghasemi and S.M. Aminossadati, "Numerical simulation of mixed
convection in a rectangular enclosure with different numbers and
arrangements of discrete heat sources", Arabian Journal for Science
and Engineering, 33 (1):189, 2008.
[7] G.G. Kumar and C.G. Rao, "Interaction of surface radiation with
conjugate mixed convection from a vertical plate with multiple non
identical discrete heat sources", Chemical Engineering
Communications, 198 (5): 692-710, 2011.
[8] La Pica, G. Rodonn, and R. Volpes, "An experimental investigation on
natural convection of air in a vertical channel", International Journal of
Heat and Mass Transfer, 36 (3):611-616, 1993.
[9] S. Lee, JR Culham, and MM Yovanovich, "Parametric investigation of
conjugate heat transfer from microelectronic circuit boards under
mixed convection cooling", International electronic packaging
conference, San Diego, September, pages 15 - 19, 1991.
[10] G.M. Rao and G. Narasimham, "Laminar conjugate mixed convection
in a vertical channel with heat generating components", International
Journal of Heat and Mass Transfer, 50 (17-18):3561-3574, 2007.
[11] SM Sawant and C. Gururaja Rao, "Conjugate mixed convection with
surface radiation from a vertical electronic board with multiple discrete
heat sources", Heat and Mass Transfer, 44 (12):1485-1495, 2008.
[12] H. Turkoglu and N. Yucel, "Mixed convection in vertical channels with
a discrete heat source", Heat and Mass Transfer, 30 (3):159-166, 1995.
[13] T.V.V. Sudhakar, A. Shori, C. Balaji, and S.P. Venkateshan.,"Optimal
heat distribution among discrete protruding heat sources in a vertical
duct: A combined numerical and experimental study", Journal of Heat
Transfer, 132 : 011401, 2010.
[14] S. P. Venkateshan, "Mechanical Mesurements", Ane Books, New Delhi,
India, 2008.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:58651", author = "Tapano Kumar Hotta and S P Venkateshan", title = "Natural and Mixed Convection Heat Transfer Cooling of Discrete Heat Sources Placed Near the Bottom on a PCB", abstract = "Steady state experiments have been conducted for
natural and mixed convection heat transfer, from five different sized
protruding discrete heat sources, placed at the bottom position on a
PCB and mounted on a vertical channel. The characteristic length (
Lh ) of heat sources vary from 0.005 to 0.011 m. The study has been
done for different range of Reynolds number and modified Grashof
number. From the experiment, the surface temperature distribution
and the Nusselt number of discrete heat sources have been obtained
and the effects of Reynold number and Richardson number on them
have been discussed. The objective is to find the rate of heat
dissipation from heat sources, by placing them at the bottom position
on a PCB and to compare both modes of cooling of heat sources.", keywords = "Discrete heat source, mixed convection, natural
convection, vertical channel", volume = "6", number = "8", pages = "1657-8", }