Oil flows in a pipe 80 mm radious with a mean velocity of 4 m/s. The mean surface roughness is 0.02 mm and the length is 60 m. The dynamic viscosity is 0.005 N s/m2 and the density is 900 kg/m3. Determine the pressure loss.
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- Q2. Oil with an absolute viscosity of 0.125 N.s/m² and a density of 890 kg/m' is flowing in a 16.5 cm diameter pipe at a 7.5 L/s flow rate. • The fully developed flow is expected to start after.. ... m of pipe entrance.. • plot the shear stress within the pipe cross section.Medium oil having a sp.gr. of 0.90 flows through a 120 mm diameter pipe with a mean velocity of 5.3 m/s and a friction factor of 0.01. Oil has an absolute viscosity of 0.04 Pa-s. Compute the velocity at the center. a) 7 m/s c) 5 m/s b) 6 m/s d) 8 m/s 2 Compute the shear stress at the wall of the pipe. a) 48.62 N/m2 c) 31.60 N/m² b) 59.47 N/m2 d) 52.31 N/m² Compute the velocity at 40 mm from the center of the pipe. a) 5.485 m/s b) 6.325 m/s c) 7.458 m/s d) 8.569 m/sQ3. SAE 30 oil (Sp. Gr. =0.833) with a dynamic viscosity 0.28 N.S/m? flows in a 4-cm-diameter pipe which is inclined with an angle 37°. For the pressure measurement shown, determine A. Whether the flow is up or down The flow rate in m'/h C. The shear stress and velocity 1 cm from the boundary Draw the shear stress and velocity profile with the section of the pipe. В. D. P-180 kPa P- sOokPa 15m 20m
- The pipe bend shown is in a horizontal plane. Oil with a specific gravity of 0.86 enters the reducing bend at section A with a velocity of 3.2 m/s and a pressure of 150 kPa. Neglecting head loss, determine a) FMY (N) b) Fpx (N) c) Fpx (N) de = 100 mm da = 150 mm 30° ADirection: Choose A- When both statements are true; B - When both statements are false; C- When the first statement is true and the second statement is false; D- When the first statement is false and the second statement is true. First Statement: The piezometric surface of an aquifer confined by an aquiclude is higher than that of an unconfined. Second Statement: Hydraulic conductivity is a measure of permeability or impermeability of a geologic unit. OA B. D.Question 4 A 150 mm diameter pipe is connected to a large tank with a bellmouth inlet. The pipe is carrying oil (specific gravity 0.85) with an absolute viscosity of 0.0056 N-s/m² and the roughness elements of the pipe wall is estimated as k = 0.9 mm. (a) Above what flow rate will this pipe behave as a fully rough pipe? (b) Below what flow rate will it behave as a smooth pipe?
- PROBLEM 2 The pipe bend shown is in a horizontal plane. Oil with a specific gravity of 0.86 enters the reducing bend at section A with a velocity of 3.2 m/s and a pressure of 150 kPa. Neglecting head loss, determine (a) The velocity at section B, V (m/s) (b) The pressure at section B, ps (kPa) (с) Fмх (N) (d) FMY (N) (е) Fpx (N) (f) Fpy (N) (g) The x-component of the reaction by the bend, FRx (N) and (h) The y-component of the reaction by the bend FRY (N). de = 100 mm B- da = 150 mm 30°Flow Between pipes A viscos flow is taking place b/w the two horizontal parallel fixed plates which are 80mm apart. The maximum velocity is 1.5 m/s and dynamic viscosity of oil is 1.962 N-s/m². The magnitude of pressure gradient in kPa/m isAssuming that pressure will increase at a uniform rate and there is no damping of the pressure wave. Water from a reservoir that flows through a 650mm pipe at 1.8m/s is completely stopped by a closure of a 160 m valve from the reservoir. The thickness of the pipe is 25mm, bulk modulus of water is 2.2x10⁹ Pa and E of steel is 1.4x10¹¹ Pa. Determine the following: a. Celerity of the pressure wave b. Equivalent bulk modulus of water c. Pressure on the pipe after closure of the valve d. Time required to avoid water hammer e. Water hammer pressure of the velocity will decrease to 1.2m/s f. Maximum permissible discharge after the outlet valve closure. ANSWER: d) t = 0.256 sec. e) Ph=pCAV = 749.8476 kPa f) Q = AV = 0.597 m³/s a) C = 1249.746m/s b) k' = 1.562x10⁹ Pa c) Ph=pCV = 2249.5428 kPa
- An oil having viscosity 0.08 N-s/m2, specific weight 8829 N/m³, density 900 kg/m³ flows at the rate of 5.4 x 10-3 m³/s through a horizontal circular pipe of 0.12 m diameter and length 150 m. Find, (i) pressure difference in 150 m length in kN/m² (ii) wall shear stress in N/m² (iii) average and maximum velocityThe pipe bend shown is in a horizontal plane. Oil with a specific gravity of 0.86 enters the reducing bend at section A with a velocity of 3.2 m/s and a pressure of 150 kPa. Neglecting head loss, determine The pressure at section B, ps (kPa) FMx (N) FMY (N) de = 100 mm da = 150 mm 30°. Determine the surface tension in a tube with 0.2m radius and wetting angle 80 and capillary rise of 5mm in N/m and in lb/ft.