August 25, 2012 Journal article Open Access

Tapano Kumar Hotta; S P Venkateshan

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        <foaf:name>Tapano Kumar Hotta</foaf:name>
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    <dct:creator>
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        <foaf:name>S P Venkateshan</foaf:name>
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    <dct:title>Natural and Mixed Convection Heat Transfer Cooling of Discrete Heat Sources Placed Near the Bottom on a PCB</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2012</dct:issued>
    <dcat:keyword>Discrete heat source</dcat:keyword>
    <dcat:keyword>mixed convection</dcat:keyword>
    <dcat:keyword>natural convection</dcat:keyword>
    <dcat:keyword>vertical channel</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2012-08-25</dct:issued>
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    <dct:description>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.</dct:description>
    <dct:description>{"references": ["S. Baskaya, U. Erturhan, and M. Sivrioglu, \"An experimental study on\nconvection heat transfer from an array of discrete heat sources\",\n.International Communications in Heat and Mass Transfer, 32 (1-2):\n248- 257, 2005.", "H. Bhowmik, CP Tso, and KW Tou, \"Analyses of convection heat\ntransfer from discrete heat sources in a vertical rectangular channel\",\nJournal of Electronic Packaging, 127: 215, 2005.", "CY Choi and SJ Kim, \"Conjugate mixed convection in a channel:\nmodified five percent deviation rule\", International Journal of Heat\nand Mass Transfer, 39 (6):1223 - 1234, 1996.", "P.T.J.R. Culham and MM Yovanovich, \"Comprehensive review of\nnatural and mixed convection heat transfer models for circuit board\narrays\", Journal of Electronics Manufacturing, 7 (2):79-92, 1997.", "IA Ermolaev and AI Zhbanov, \"Mixed convection in a horizontal\nchannel with local heating from below\", Fluid Dynamics, (1):29-35,\n2004.", "B. Ghasemi and S.M. Aminossadati, \"Numerical simulation of mixed\nconvection in a rectangular enclosure with different numbers and\narrangements of discrete heat sources\", Arabian Journal for Science\nand Engineering, 33 (1):189, 2008.", "G.G. Kumar and C.G. Rao, \"Interaction of surface radiation with\nconjugate mixed convection from a vertical plate with multiple non\nidentical discrete heat sources\", Chemical Engineering\nCommunications, 198 (5): 692-710, 2011.", "La Pica, G. Rodonn, and R. Volpes, \"An experimental investigation on\nnatural convection of air in a vertical channel\", International Journal of\nHeat and Mass Transfer, 36 (3):611-616, 1993.", "S. Lee, JR Culham, and MM Yovanovich, \"Parametric investigation of\nconjugate heat transfer from microelectronic circuit boards under\nmixed convection cooling\", International electronic packaging\nconference, San Diego, September, pages 15 - 19, 1991.\n[10] G.M. Rao and G. Narasimham, \"Laminar conjugate mixed convection\nin a vertical channel with heat generating components\", International\nJournal of Heat and Mass Transfer, 50 (17-18):3561-3574, 2007.\n[11] SM Sawant and C. Gururaja Rao, \"Conjugate mixed convection with\nsurface radiation from a vertical electronic board with multiple discrete\nheat sources\", Heat and Mass Transfer, 44 (12):1485-1495, 2008.\n[12] H. Turkoglu and N. Yucel, \"Mixed convection in vertical channels with\na discrete heat source\", Heat and Mass Transfer, 30 (3):159-166, 1995.\n[13] T.V.V. Sudhakar, A. Shori, C. Balaji, and S.P. Venkateshan.,\"Optimal\nheat distribution among discrete protruding heat sources in a vertical\nduct: A combined numerical and experimental study\", Journal of Heat\nTransfer, 132 : 011401, 2010.\n[14] S. P. Venkateshan, \"Mechanical Mesurements\", Ane Books, New Delhi,\nIndia, 2008."]}</dct:description>
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