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Laminar mixed convection in the entrance region of shrouded arrays of heated rectangular blocks
Author(s) -
Lin JennNan,
Yen ChenShyong,
Chou FuChu
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660302
Subject(s) - nusselt number , laminar flow , streamlines, streaklines, and pathlines , prandtl number , mechanics , combined forced and natural convection , convection , block (permutation group theory) , heat transfer , flow (mathematics) , materials science , convective heat transfer , physics , natural convection , geometry , mathematics , reynolds number , turbulence
Laminar mixed convection in the entrance region of shrouded arrays of heated rectangular blocks is approximated numerically for large Prandtl number fluids. The problem considered is related to the convective cooling of electronic components mounted on horizontal circuit boards. Two heating conditions are investigated; in case 1, the uniformly heated components are facing upwards and, in case 2, the heated components are facing downwards. Typical fluid streamlines and isotherms, block wall temperature distributions and local Nusselt numbers are presented. It is found that the secondary flow leads to a significant enhancement in heat transfer for cases where the block faces upwards rather than downwards.