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Conduct thorough a research on Boundary layer and viscous sub layer, Shear stress in circular pipe as it relates to
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- Air at 20C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance from the entrance to the point at which the hydrodynamic boundary layers meet.Conduct thorough a research on Reynolds Number, laminar and turbulent flow as it relates to mechanics of fluidsDraw neat sketches of the following and label them:D. An open system with variable imaginary boundaryE. Turbulent flow through a pipe with velocity distribution
- 1.What is the difference between laminar and turbulent flow, and how does this affect fluid mechanics in mechanical engineering?What are the physical and quantitative evidence of turbulence in fluid flow?Fluid from a large reservoir at temperature T 0 fl ows into acircular pipe of radius R . The pipe walls are wound with anelectric resistance coil that delivers heat to the fl uid at a rateq w (energy per unit wall area). If we wish to analyze thisproblem by using the full continuity, Navier-Stokes, andenergy equations, what are the proper boundary conditionsfor the analysis?
- 6- High-speed airflow occurs in a 25 cm diameter pipe, such that the Reynolds number is very large. The roughness of the pipe is 0.01mm. What is the friction factor for this flow, given that the Colebrok equation is reduced to the Von Karman equation with a large Reynolds number?Differentiate incompressible and compressible flow. Give at least two (2) examples relating to aeronautical and/or aerospace.A capillary tube has an 8mm inside diameter through which liquid fluorine refrigerant R-11 flows at a rate of 0.03 cm3/s. The tube isto be used as a throttling device in an air conditioning unit. A model of this flow is constructed by using a pipe of 3cm inside diameter and water as the fluid medium. (Density of R-11 = 1.494 g/cm3 and its viscosity is 4.2 x10-4 Pa.s; Density of water is 1g/cm3 and its viscosity 8.9 x10-4 Pa.s)a) What is the required velocity in the model for dynamic similarity? Hint: For flow through a tube the Ne number can be expressed in terms of the Reynolds numberb) When dynamic similarity is achieved the pressure drop is measured at 50 Pa. What is the corresponding pressure drop in the capillary tube?Hint: In this case the Euler number defines dynamic similarity with reference to the static pressure drop
- 1.).A cylindrical shaft of radius 5 cm is rotating at a speed of 50 rad/s in a cylindrical bearing . Shaft and bearing are concentric . The lubricant of viscosity 0,6 Pa s and SG= 0,9 completely fills the clearance between shaft and bearing surface. Take clearance as 0,5 cm and length of shaft as 10 cm . The lubricant flow is laminar steady and uniform . Frictional force on shaft surface is ? ANSWER:9,42 NAn 16-kg slab slides down a 25° inclined plane on a 4-mmthick film of SAE 30 oil at 15.6 °C; the contact area is0.3m2. Find the terminal velocity of the slab. Explain ur answerThe continuity equation of fluids describes the property of energy conservation; and Bernoulli's equation indicates conservation of mass. Ture OR Fale