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Question 4 a. Explain briefly what is meant by drag and its form. b. A smooth thin plate 5 m long and 1 m wide is placed in air streamed moving at 3 m/s with its length parallel with the flow. Analyse the drag force on each side of the plate. The density of the air is 1.2 kg/m3 and the kinematic viscosity is 1.6 x 10-5 m²/s.

Question 4 a. Explain briefly what is meant by drag and its form. b. A smooth thin plate 5 m long and 1 m wide is placed in air streamed moving at 3 m/s with its length parallel with the flow. Analyse the drag force on each side of the plate. The density of the air is 1.2 kg/m3 and the kinematic viscosity is 1.6 x 10-5 m²/s.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Question 4 а. Explain briefly what is meant by drag and its form. A smooth thin plate 5 m long and 1 m wide is placed in air streamed moving at 3 m/s with its length parallel with the flow. Analyse the drag force on each side of the plate. b. The density of the air is 1.2 kg/m3 and the kinematic viscosity is 1.6 x 10-5 m2/s. A pipe bore diameter D and length L has fully developed laminar flow throughout the entire length with a centre line velocity u0. Given that the drag coefficient is given as CD = 16/Re where Re = pu,D/p. С. Derive the expression of the drag force on the inside of the pipe to be FD = 8TTpu,L and hence show the pressure loss due to skin friction is pL = 32µu,L/D2 %3D
Transcribed Image Text:Question 4 а. Explain briefly what is meant by drag and its form. A smooth thin plate 5 m long and 1 m wide is placed in air streamed moving at 3 m/s with its length parallel with the flow. Analyse the drag force on each side of the plate. b. The density of the air is 1.2 kg/m3 and the kinematic viscosity is 1.6 x 10-5 m2/s. A pipe bore diameter D and length L has fully developed laminar flow throughout the entire length with a centre line velocity u0. Given that the drag coefficient is given as CD = 16/Re where Re = pu,D/p. С. Derive the expression of the drag force on the inside of the pipe to be FD = 8TTpu,L and hence show the pressure loss due to skin friction is pL = 32µu,L/D2 %3D
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