NDLI: An Experimental Study of Natural Convection From an Array of Heated Protrusions on a Vertical Surface in Water

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Joshi, Y. Willson, T. Hazard, S. J.
Copyright Year	1989
Abstract	An experimental study of steady state and transient natural convection from a single column of eight heated, rectangular protrusions mounted on a vertical surface in water is presented. The component power dissipation levels were varied in the range 0.2–1.5 W using foil heaters attached to the base of each protrusion. Visualizations in three different vertical planes indicated a three-dimensional, laminar developing boundary region type flow structure away from the protrusions. Near the vertical surface, the fluid followed the protrusion boundaries with no evidence of vortex formation. Surface temperatures were measured at the centers of each of the five fluid exposed faces. Nondimensional heat transfer rates were calculated based on these measurements. Accounting for the increasing convected energy downstream resulted in a single correlation for all components and power levels. Temperature measurements in the adjacent fluid were made using a movable hypodermic probe. Transport evolution during the transient showed initially diffusive patterns, followed by rapid development of entrainment.
Starting Page	121
Ending Page	128
Page Count	8
File Format	PDF
ISSN	10437398
e-ISSN	15289044
Journal	Journal of Electronic Packaging
Volume Number	111
Issue Number	2
DOI	10.1115/1.3226516
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	1989-06-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Energy dissipation Flow (Dynamics) Fluids Heat transfer Measurement Natural convection Probes Steady state Temperature Temperature measurement Visualization Vortices Water
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications Mechanics of Materials Electronic, Optical and Magnetic Materials

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