Afluid whose viscosity is unknown flow past a flare plate at a free stream velocity such that the the boundary layer thickness is 10mm at a distance of 2.2m from the leading edge. assuming laminar flow throughout. determine the boundary layer thickness at a distance 5m from the leading edge.

δ₂ = 15.07 mm

Explanation:

Given :

When the leading edge, is 2.2 m, then boundary layer thickness,δ₁ = 10 mm = 0.01 m

= 5 m

Now we know that for a laminar flow, the boundary layer thickness is

δ = -------(1)

and Reyonlds number, Re is

               ------(2)

where ρ is density

           v is velocity

           x is distance from the leading edge

           μ is dynamic viscosity

from (1) and (2), we get

δ∝

Therefore,

δ₂ = 15.07 mm

Therefore, boundary layer thickness is 15.07 mm when the leading edge is 5 m.

do you have any options?

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only