Abstract
Numerical and experimental studies are carried out on natural convection heat transfer to air from an array of vertical parallel plates with protruding and discrete heat sources such as IC packages. Two-dimensional Navier-Stokes and energy equations including heat conduction through the plates and heat sources are numerically solved under the conditions of modified Grashof number Gr=2.3×103∼8.8×105 and aspect ratio L=l/h=8∼30. The numerical solution agree well with the experimental values except for the large aspect ratio L=30 where the three-dimensional effects become significant. A correlation expression for the local Nusselt number is proposed which can predict the protrusion surface temperature within 20% error. The estimation of the protrusion center temperature is also discussed.
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