Briefly explain laminar, transition and turbulent flow based on boundary layer separation.
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Q1) Briefly explain laminar, transition and turbulent flow based on boundary layer separation.
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- Air at 1000C flows at an inlet velocity of 2 m/s between two parallel flat plates spaced 1 cm apart. Estimate the distance from the entrance to the point where the boundary layers meet.Engine oil at 100C flows over and parallel to a flat surface at a velocity of 3 m/s. Calculate the thickness of the hydrodynamic boundary layer at a distance 0.3 m from the leading edge of the surface.Explain boundary layer thickness?
- Answer the following. Must answer all the questions. Dont attempt partially. i. Description of external flow phenomena, ii. Effect of boundary layer theory on external flow iii. Explanation of Reynold’s number and its significance on external flow studies.What are the physical and quantitative evidence of turbulence in fluid flow?Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/s. kindly give me the solution of this problem with correct and logical reasoning.
- Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/s. I got the first solution which was wrong kindly solve it correctlyAir at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/sConsider two pressure taps along the wall of a laminar boundary layer as in Fig. The fluid is air at 25°C, U1 = 13.7 m/s, and the static pressure P1 is 2.96 Pa greater than static pressure P2, as measured by a very sensitive differential pressure transducer. Is outer flow velocity U2 greater than, equal to, or less than outer flow velocity U1? Explain. Estimate U2
- Which one of the following is not a flow region where the boundary layer approximation may be appropriate? (a) Jet (b) Inviscid region (c) Wake (d ) Mixing layer (e) Thin region near a solid wallflat plate 30 cm by 50 cm slides on oil (μ = 0.8 N⋅s/m2) over a large plane surface. What force is required to drag the plate at 2 m/s, if the separating oil film is 0.5 mm thick?A liquid (? = 850 kg/?3; ? = 1.7 × 10−1 Pa ∙ s) flows tangentially past a flat plate. If the free stream velocity is 2 m/s Question 1: what is the velocity 5 m downstream from the leading edge of the plateand 15 mm away from the plate. Question 2: if that plate is 10 m long and 3 m wide. Determine the drag force on the plate when liquid flows over both sides of the plate. (just only answer Question 2)!!!