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Question 13) A boundary layer is a thin region (usually along a wall)in which viscous forces are significant and within which the flow is rotational. Consider a boundary layer growing along a thin flat plate. The flow is steady. The boundary layer thickness d (m) at any downstream distance x is a function of x (m), free-stream velocity V(m/s)', fluid properties fluid density p (kg m³), fluid viscosity µ (kgm.s), sound velocity c (m/s) and surface roughness & (m). i-Use the method of repeating variables to generate a dimensionless relationship between boundary layer thickness & (m) and other parameters. Show all your work in detail. ii-calculate the boundary layer thickness 8 (m) value for x=19 m, free-stream velocity V=180 (m/s)", fluid properties fluid density p=1.190 (kg/m³), fluid viscosity µ=1.890 x10$ (kg/m.s), sound velocity c=345 (m/s) and surface roughness e=0.015m (m). What should the velocity of wind tunnel test the similar in wind tunnel at the same temperature and pressure…

In a compressible flow, in which case the viscous and heat-conduction effects are not important? a.Thin layers in the interior of the flow b.Wakes downstream of solid bodies c.Far field away from the solid surfaces d.Shock waves e.Thin boundary layers along solid bodies

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