Ch 6 Solutions White Flui Mechanics 7Ed.-Latest Questions and answers

An engineer claims that flow of SAE 30W oil, at 20°C, through a 5-cm-diameter smooth pipe at 1 million N/h, is laminar. Do you agree? A million newtons is a lot, so this sounds like an awfully high flow rateAn engineer claims that flow of SAE 30W oil, at 20°C, through a 5-cm-diameter smooth pipe at 1 million N/h, is laminar. Do you agree? A million newtons is a lot, so this sounds like an awfully high flow rateFollowing up Prob. P6.2, suppose the Alaska Pipeline were carrying 30 million U.S. gallons per day of SAE 30W oil at 20°C? Estimate the Reynolds number. Is the flow laminar?For flow of SAE 30W oil through a 5-cm-diameter pipe, from Fig. A.1, for what flow rate in m3 /h would we expect transition to turbulence at (a) 20°C and (b) 100°C?In flow past a body or wall, early transition to turbulence can be induced by placing a trip wire on the wall across the flow, as in Fig. P6.5. If the trip wire in Fig. P6.5 is placed where the local velocity is U, it will trigger turbulence if Ud/ν = 850, where d is the wire diameter [Ref. 3 of Ch. 6]. If the sphere diameter is 20 cm and transition is observed at ReD = 90,000, what is the diameter of the trip wire in mm?FLUID MECHANICSFLUID7th Ed