2-Air at 30 C over a flat plate at speed of 1.2 m/sec. Calculate the boundary layer thickness at distance of 20 cm and 40 cm from leading adge of the plate.Also calculate mass flow rate between these points. Assume air properties from table.
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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.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.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.
- i just need final answer Air with uniform velocity of U is flowing over flat square-shape plates with different arrangements given infigure below. One plate is used in arrangement (a), whereas four square plates are used in the arrangement (b)All the plates are the same size. What is the frictional forces ratio (F/F)? (Note: Assume laminar boundarylayer condition along the plate arrangements)Air at 20°C, 1 atm flows with a velocity of 4.5 m/s over a flat plate having a sharp leading edge. The plate surface isothermal at 60°C. (a), determine the following parameters at a distance of 1.89m. i)Mass entrainment in the boundary layer (ii)The skin friction coefficientConsider a two-dimensional airfoil that is modelled using potential flow, if the angle of attack is continuously increased, will the airfoil stall? Yes O No Only if the flow is supersonic Only if the Kutta condition is imposed
- Starting from the basic principles, drive an expression to compute the lift coefficient when the free stream Mach number equals (0.8)Air at 20-C and 1 atm flows over a flat plate at 35 m/s. The plate is 75 cm long and is maintained at 60-C. AJASsuming unit depth in the z direction, calculate the heat transfer from the plate. Calculate the turbulent-boundary-layer thickness at the end of the plate assuming that it develops B) from the leading edge of the plate and C) from the transition point at Recrit =5x105.Sand particles (SG = 2.7), approximately spherical withdiameters from 100 to 250 μm, are introduced into anupward-flowing stream of water at 20°C. What is theminimum water velocity that will carry all the sand particlesupward?
- 1-The wind blows with velocity 0.4 m/s parallel to the both sides of a flat plate with rectangular area 10m×10 m. The plate temperature is T0=60◦C, and the temperature of the air free stream is 20◦C. Assume laminar flow and calculate: (a) maximum boundary layer thickness, (b) the total force experienced by the plate, (c) estimate the total heat transfer rate by laminar forced convection (d) Make a qualitative sketch of how the local heat flux qx and τx varies along the length L.Example 6. For free flow of air over a plate, it is given that Grashof number is 7 x 10° and Prandtl number is 0.25. Then, determine the type of flow.Calculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40⁰C and. The plate temperature is 100⁰ C while the air speed is 5 m/s.Find the thickness of the boundary layer at a distance of x = 20 cm, for the same data in problem "number 1 In the picture below"