Trip wire d
Residential Construction Academy: House Wiring (MindTap Course List)
4th Edition
ISBN:9781285852225
Author:Gregory W Fletcher
Publisher:Gregory W Fletcher
Chapter13: Switching Circuit Installation
Section: Chapter Questions
Problem 18RQ
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Question
In flow past a body or wall, early transition to turbulence
can be induced by placing a tripwire on the wall across the
flow, as in Fig. If the trip wire in Fig. is placed
where the local velocity is U, it will trigger turbulence if
Ud/ν = 850, where d is the wire diameter [3, p. 388]. If the
sphere diameter is 20 cm and the transition is observed at
ReD = 90,000, what is the diameter of the tripwire in mm?
Transcribed Image Text:Trip wire d
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