Homework Answers
We can use value of density if
we consider value of dynamic viscosity.I used kinematic viscosity
in the Reynolds Number.
Thank you.
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Question 1: (20 marks) On a circular conduit there are different diameters: diameter Di 1 m chang...
Please!. I need help PROBLEMS 1. What is the Reynold's number for water flowing in a...
Please!. I need help
PROBLEMS 1. What is the Reynold's number for water flowing in a 24-inch circular pipe at a velocity of 6.21 ft/s? Is the flow laminar or turbulent? 2. Water is flowing in a 2/2-inch pipe with a discharge of 0.150 cfs. Find the Reynold's number for this flow. Is the flow laminar or turbulent? 3. Water is flowing in a 4-inch pipe with a discharge of 4.0 × 10-3 cfs. Find the Reynolds number for this...
Air enters a 10-m-long section of a rectangular duct of cross section 15 cm X 20 cm made of commercial steel at an average velocity of 7 m/s
Air enters a 10-m-long section of a rectangular duct of cross section 15 cm X 20 cm made of commercial steel at an average velocity of 7 m/s.(p = 1.145kg/m3 ,μ = 1.895x10-5kg/ms) and e=0.000045 m). For this pipe determine (a)the Reynolds number and decide weather the flow is laminar or turbulent (b) the head loss, (c) the pressure drop, and (d) the pumping power requirement to overcome this pressure drop.
3. Water flows at a uniform velocity of 1 em/s in a circular channel of diameter...
3. Water flows at a uniform velocity of 1 em/s in a circular channel of diameter 2 cm and length 2 m. A uniform heat flux of 10 W/m2 is supplied at the surface. Assume laminar flow and developed flow and temperature. (a) Calculate the variation of the mixing cup temperature with distance and the Nusselt number. (b) If the mixing cup temperature at the inlet is 22 oC, calculate the mixing cup and wall temperatures at the outlet? (e)...
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be...
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be one dimensional with a velocity profile given by u(r) = Umax(1 - 52/R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and Umax is the maximum flow velocity at the center of the pipe. a) Derive a relation for the drag force applied by the fluid on a section of the pipe of...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m invested by air flow with velocity V. = 12 Wind tunnel experiments measured the vortex shedding frequency to be equal to f = 0.65 Hz and a drag force per unit length equal to F) = 330.75 a. Calculate the respective Strouhal number and drag coefficient. b. How much is the Strouhal number in case the incoming velocity is increased to 20 m/s? The...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200 mm when the difference of pressure head between the ends of the pipe 500 m apart is 4 m of water. Take the value off= 0.009 in the formula hl= a) 19.5e/s b)2.0es e)03 m's d) 29.3 e/s 2. A scale 1:50 scale model of ship is towed through sea water at a speed of 1 ms. A force of 2 N is required...
Doe: 4pm, August 27,2018 Question 1 will be marked in detail For Question 1, use the...
Doe: 4pm, August 27,2018 Question 1 will be marked in detail For Question 1, use the problem-solving protocol and show all working, Questions 2, 3,4 and 5 will be marked for quality and complctcnecss only and can be trcated as extensions of Question 1. Solutions will be provided aftert the marking is compickt 1. Water flows through a very loag 50 mam ID Onternal Diameter) galvanised iroa pipe. The pipe is horizontal and has an internal roughness height af ε...
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely...
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely laminar over the entire plate. a. b. Determine the drag force on one side of the plate. Determine the thicknesses δ, δ*, and θ at the end of the plate (x L). [6 marks] C. For air use,...
Question (20 marks Analysis only required Water at 15°C is discharged freely to atmosphere from a...
Question (20 marks Analysis only required Water at 15°C is discharged freely to atmosphere from a reservoir at 18 L/s through two horizontal pipes in series and a pump-motor assembly in between as shown in figure below. First pipe-A is made of cast Iron and is 20m in length with a 60mm dia. The second pipe-B is 35 m in length, has a 40 mm diameter with friction factor 0.0331. The pipe entrance from reservoir is sharp edged. Neglect any...
1. (4 marks) A certain hose has a pressure drop vs flow function as follows: Po...
1. (4 marks) A certain hose has a pressure drop vs flow function as follows: Po 0.2 Q2 where pressure drop (Po) is measured in psi and flow (Q) is measured in litres per minute Use EXCEL to create a table of values based on the above equation and plot the data on an EXCEL graph for values from 0 to 15 litres per minute in steps of 0.1 litres per minute. All of your formulas, tables and graphing should...
Please!. I need help
PROBLEMS 1. What is the Reynold's number for water flowing in a 24-inch circular pipe at a velocity of 6.21 ft/s? Is the flow laminar or turbulent? 2. Water is flowing in a 2/2-inch pipe with a discharge of 0.150 cfs. Find the Reynold's number for this flow. Is the flow laminar or turbulent? 3. Water is flowing in a 4-inch pipe with a discharge of 4.0 × 10-3 cfs. Find the Reynolds number for this...
3. Water flows at a uniform velocity of 1 em/s in a circular channel of diameter 2 cm and length 2 m. A uniform heat flux of 10 W/m2 is supplied at the surface. Assume laminar flow and developed flow and temperature. (a) Calculate the variation of the mixing cup temperature with distance and the Nusselt number. (b) If the mixing cup temperature at the inlet is 22 oC, calculate the mixing cup and wall temperatures at the outlet? (e)...
2. (20 marks) The fully-developed, laminar fluid flow through a circular pipe is considered to be one dimensional with a velocity profile given by u(r) = Umax(1 - 52/R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and Umax is the maximum flow velocity at the center of the pipe. a) Derive a relation for the drag force applied by the fluid on a section of the pipe of...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m invested by air flow with velocity V. = 12 Wind tunnel experiments measured the vortex shedding frequency to be equal to f = 0.65 Hz and a drag force per unit length equal to F) = 330.75 a. Calculate the respective Strouhal number and drag coefficient. b. How much is the Strouhal number in case the incoming velocity is increased to 20 m/s? The...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200 mm when the difference of pressure head between the ends of the pipe 500 m apart is 4 m of water. Take the value off= 0.009 in the formula hl= a) 19.5e/s b)2.0es e)03 m's d) 29.3 e/s 2. A scale 1:50 scale model of ship is towed through sea water at a speed of 1 ms. A force of 2 N is required...
Doe: 4pm, August 27,2018 Question 1 will be marked in detail For Question 1, use the problem-solving protocol and show all working, Questions 2, 3,4 and 5 will be marked for quality and complctcnecss only and can be trcated as extensions of Question 1. Solutions will be provided aftert the marking is compickt 1. Water flows through a very loag 50 mam ID Onternal Diameter) galvanised iroa pipe. The pipe is horizontal and has an internal roughness height af ε...
1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely laminar over the entire plate. a. b. Determine the drag force on one side of the plate. Determine the thicknesses δ, δ*, and θ at the end of the plate (x L). [6 marks] C. For air use,...
Question (20 marks Analysis only required Water at 15°C is discharged freely to atmosphere from a reservoir at 18 L/s through two horizontal pipes in series and a pump-motor assembly in between as shown in figure below. First pipe-A is made of cast Iron and is 20m in length with a 60mm dia. The second pipe-B is 35 m in length, has a 40 mm diameter with friction factor 0.0331. The pipe entrance from reservoir is sharp edged. Neglect any...
1. (4 marks) A certain hose has a pressure drop vs flow function as follows: Po 0.2 Q2 where pressure drop (Po) is measured in psi and flow (Q) is measured in litres per minute Use EXCEL to create a table of values based on the above equation and plot the data on an EXCEL graph for values from 0 to 15 litres per minute in steps of 0.1 litres per minute. All of your formulas, tables and graphing should...
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