NDLI: Onset of Transition in the Flow Over a Three-Dimensional Array of Rectangular Obstacles

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Garimella, S. V. Eibeck, P. A.
Copyright Year	1992
Abstract	Onset of transition is investigated in the flow over an array of protruding elements mounted on the bottom wall of a rectangular water channel simulating flow passages between adjacent circuit boards in computers. The element dimensions are held constant while the channel height and the element spacing are varied. Flow visualization and turbulence measurements are used to determine transition Reynolds numbers, which compare well with previous results obtained from heat transfer data. The complicated, three-dimensional flow field causes transition to be a function not only of flow rate and array geometry but also of location in the array. Transition occurs in the fully developed region of the array at a channel height-based Reynolds number of 700 for a channel height of 1.2 element heights, increasing to 1900 for a channel height of 3.6 element heights. However, when Reynolds number is defined based on element height, transition occurs at the same Reynolds number of 550 for all channel heights. Increasing the stream wise spacing between elements causes transition to occur at lower Reynolds numbers.
Starting Page	251
Ending Page	255
Page Count	5
File Format	PDF
ISSN	10437398
e-ISSN	15289044
Journal	Journal of Electronic Packaging
Volume Number	114
Issue Number	2
DOI	10.1115/1.2906426
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	1992-06-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Channels (Hydraulic engineering) Circuits Computers Dimensions Flow (Dynamics) Flow visualization Geometry Heat transfer Lumber Measurement Reynolds number Turbulence 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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