Sketch the shear stress and velocity distribution for laminar flow across a pipe section?
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- (3) Oil being used as a coupling agent with a density of 892 kg/m³ is flowing through the piping arrangement shown in the figure below at a rate of 1.388 x 10-3 m³/s entering pipe 1. The flow divides equally in each of pipes 3. The steel pipes have the following internal diameters: Pipe 1 = 52.5 mm, Pipe 3 = 40.9 mm. Calculate the following using SI units. (a) The total mass flow rate m in pipe 1 and pipes 3. (b) The average velocity v in 1 and 3 (c) The flux G in pipe 1. 2 1/2-in. pipe 2-in. pipe 3-in. pipe 1/2 -in. pipe 3EX in Asteel of speçific weight cy lin der (1"diametar andiz" Long) (8) =490 1b fI Ft3 fall be Cause of its own weight, at q uniform slig htly 9. rate of on5 HIs in side a tube of larger diameter.A Castor- oil film M = 6x lo -3 16 between t-s Constant thihness and the tube between of %3D is the cylinder Determine the cleamanCe (y) in ft the Cylinder and the tube-The velocity profile in fully developed laminar flow in a circular pipe of inner radius ro, is given by v=9(1-7) Find: 1) Plot the velocity profile. 2) The volume of water flows out of the pipe in 0.2 min?
- 8.8 Velocity and temperature profiles for laminar flow in a tube of radius r. = 10 mm have the form 0.1[1 – (r/ro)*] T(r) = 344.8 + 75.0(r/r.) – 18.8(r/r.)* u(r) with units of m/s and K, respectively. Determine the corresponding value of the mean (or bulk) temperature, Tm, at this axial position.Consider a steady, fully developed flow in a horizontal pipe of diameter 80 mm. Over a section of length 5 m of this pipe, a pressure drop of 25 kPa is observed. The average wall shear stress over this section in N/m²?Mechanical-Energy Balance and Friction Losses. Hot water is being discharged from a storage tank at the rate of 0.223 ft3/s. The process flow diagram and conditions are the same as given in Example 2.10-6, except for different nominal pipe sizes of schedule 40 steel pipe as follows. The 20-ft-long outlet pipe from the storage tank is 1 1/2 in. pipe instead of 4-in. pipe. The other piping, which was 2-in. pipe, is now 2.5-in. pipe. Note that now a sudden expansion occurs after the elbow in the 1 1/2 in. pipe to a 2 1/2 in. pipe.
- What level h must be maintained in the figure shown below to deliver a flow rate of 0.015 ft³/s through the 1/2-in commercial-steel pipe? The length of the pipe is 125 ft. For water at 20°C, take p = 1.94 slug/ft³ and μ = 2.09E-5 slug/ft s. For commercial steel, take & ≈ 0.00015 ft. For the given flow take ≈ 0.0301. Moody Water at 20°C h The surface elevation is D=1/in ft.Air (diatomic, MW = 28.8664 g/mol) at 1.7 atm gage (where Pam = 1 atm) and 15°C enters a 70-m long horizontal 75-mm-ID steel pipe (€ = 4.6(10) m). The velocity at the entrance of the pipe is 60 m/s. Assuming isothermal flow, what is the absolute pressure (atm) at the discharge end of the line? Use Churchill equation for the friction factor.Shown in the figure below is a pipe system (commecial steel pipes) having a given centerline geometry is to be used to transfer oil from Tank A to Tank B at a rate of 1.70 cubic meter per minute. Minor losses from the pipeline are due to 2 pcs-90o elbows (K = 0.5) ; Contraction (K = 0.05) and Expansion (K=1). If the oil has a density of 801.3 kilogram per cubic meter and viscosity of 2.394x10 -2 kilogram per meter per second, the diameter of the pipe in millimeter is Blank 1 mm. *Express your answers in whole significant figure without decimal value and without unit*
- Air at 30 C and 2.5 atm is to be transported at a rate of 0.25 kg/s with a maximum velocity of 5 m/s. What should be the minimum diameter of pipe to be used? Ans. 6"Evaluate the Reynolds number for flow over a tube from the following data: D=6cm,U=1.0m/s, =300kg/m3,=0.04Ns/m2.Use= Resolving of Example (1-3) Two reservoirs with a difference in elevation of 15 m are connected by the three pipes in series. The pipes are 300 m long of diameter 30 cm, 150 m long of 20 cm diameter, and 200 m long of 25 cm diameter respectively. The friction factors for the three pipes are, respectively, 0.018, 0-020 and 0-019, and which account for friction and all losses. Further the contractions and expansions are sudden. Determine the flow rate in l/s. The loss co-efficient for sudden contraction from dia. 30 cm to 20 cm = 0.24. Le-L₂ (D.) ² Le = L3 (D₁) ² 5 D3 LT. L₁ + L₂ ( D₁ ) ³ + L3 (D²₂) ³ 5 5 D3