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Answer ALL parts (a) - (c). (a) Diesel fuel flows along a pipe 6 m long, whose bore (internal diameter) is 5 mm. The density and viscosity of the fuel are 850 kg/m³ and 1.8 x 10-³ Ns/m² respectively. If the pressure-drop over the length of the pipe 1.3 kN/m², estimate the volume flow rate of fuel along the pipe. (Hint: since the bore is small, assume the flow is laminar and use Poiseuille's equation to find the flow rate. Then find the flow velocity, and hence the Reynolds number, to check that the flow is indeed laminar.) (b) Hot water at 50°C is flowing along a pipe 800 mm diameter at a mean speed of 2.3 m/s. At this temperature the kinematic viscosity of the water is v=5.55x107 m²/s. Will the flow be laminar or turbulent?

Answer ALL parts (a) - (c). (a) Diesel fuel flows along a pipe 6 m long, whose bore (internal diameter) is 5 mm. The density and viscosity of the fuel are 850 kg/m³ and 1.8 x 10-³ Ns/m² respectively. If the pressure-drop over the length of the pipe 1.3 kN/m², estimate the volume flow rate of fuel along the pipe. (Hint: since the bore is small, assume the flow is laminar and use Poiseuille's equation to find the flow rate. Then find the flow velocity, and hence the Reynolds number, to check that the flow is indeed laminar.) (b) Hot water at 50°C is flowing along a pipe 800 mm diameter at a mean speed of 2.3 m/s. At this temperature the kinematic viscosity of the water is v=5.55x107 m²/s. Will the flow be laminar or turbulent?

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
Problem 1.1MA
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A2 Answer ALL parts (a)-(c). Diesel fuel flows along a pipe 6 m long, whose bore (internal diameter) is 5 mm. The density and viscosity of the fuel are 850 kg/m³ and 1.8 x 10-³ Ns/m² respectively. If the pressure-drop over the length of the pipe 1.3 kN/m², estimate the volume flow rate of fuel along the pipe. (Hint: since the bore is small, assume the flow is laminar and use Poiseuille's equation to find the flow rate. Then find the flow velocity, and hence the Reynolds number, to check that the flow is indeed laminar.) (a) (b) (c) Hot water at 50°C is flowing along a pipe 800 mm diameter at a mean speed of 2.3 m/s. At this temperature the kinematic viscosity of the water is v=5.55x10-7 m²/s. Will the flow be laminar or turbulent? Water at 12°C is supplied to a 40 mm diameter steel pipe at 9 bar gauge pressure. The pipe is 125 m long, the roughness is k = 0.02 mm, and at the end of the pipe the water is discharged to atmosphere. Estimate the flow rate of the water and state your assumptions. (Kinematic viscosity for the water is v= 1.22 x 10-6 m²/s).
Transcribed Image Text:A2 Answer ALL parts (a)-(c). Diesel fuel flows along a pipe 6 m long, whose bore (internal diameter) is 5 mm. The density and viscosity of the fuel are 850 kg/m³ and 1.8 x 10-³ Ns/m² respectively. If the pressure-drop over the length of the pipe 1.3 kN/m², estimate the volume flow rate of fuel along the pipe. (Hint: since the bore is small, assume the flow is laminar and use Poiseuille's equation to find the flow rate. Then find the flow velocity, and hence the Reynolds number, to check that the flow is indeed laminar.) (a) (b) (c) Hot water at 50°C is flowing along a pipe 800 mm diameter at a mean speed of 2.3 m/s. At this temperature the kinematic viscosity of the water is v=5.55x10-7 m²/s. Will the flow be laminar or turbulent? Water at 12°C is supplied to a 40 mm diameter steel pipe at 9 bar gauge pressure. The pipe is 125 m long, the roughness is k = 0.02 mm, and at the end of the pipe the water is discharged to atmosphere. Estimate the flow rate of the water and state your assumptions. (Kinematic viscosity for the water is v= 1.22 x 10-6 m²/s).
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