Problem 4: The main cross-cable between towers of a coastal suspension bridge is 60 cm in diameter and 90 m long. Estimate the total drag force on this cable in crosswind of 50 miles/hour. Is the flow laminar or turbulent? Hint: Use Fig. 11-31 on page 595 of our textbook to find the drag coefficient. CD 400 200 100 60 40 8 20 10 6 4 2 1 0.6 0.4 0.2 0.1 0.06 10-1 CD= 24 Re 100 101 102 Re Smooth cylinder. 103 Smooth sphere 11.8 THE DRAG COEFFICIENT 104 Drag coefficients for a sphere and long cylinder Fig. 11-31 105 Rough cylinder 106

Problem 4: The main cross-cable between towers of a coastal suspension bridge is 60 cm in diameter and 90 m long. Estimate the total drag force on this cable in crosswind of 50 miles/hour. Is the flow laminar or turbulent? Hint: Use Fig. 11-31 on page 595 of our textbook to find the drag coefficient. CD 400 200 100 60 40 8 20 10 6 4 2 1 0.6 0.4 0.2 0.1 0.06 10-1 CD= 24 Re 100 101 102 Re Smooth cylinder. 103 Smooth sphere 11.8 THE DRAG COEFFICIENT 104 Drag coefficients for a sphere and long cylinder Fig. 11-31 105 Rough cylinder 106

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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