A)
Cp = Cp max sin θ
B)
Cp = Cp max sin2 θ
C)
Cp = Cp max cos θ
D)
Cp = Cp max cos2 θ

Correct Answer :  

Recently Updated in Aerodynamics Questions
Which of these laws is used to find the heat flux at a point in the fluid?
A)
Fourier law
B)
Fick’s law
C)
Kepler’s law
D)
Newton’s law

Correct Answer : Option (A) :   Fourier law

Explanation : Fourier law which is also known as the law of heat conduction is used to find out the heat flux at any point in the fluid. It is given by the formula:

Where, heat flux is in the y – direction
Minus sign indicates that the heat flows from high temperature to low temperature and thus q?y is in opposite direction to the temperature gradient.

What happens to the shear stress if the thickness between the two plates is increased in a Couette flow?
A)
Increases
B)
Decreases
C)
Remains same
D)
Becomes infinite

Correct Answer : Option (B) :   Decreases

Which of these laws is obeyed by a Newtonian fluid?
A)
Prandtl law
B)
Newtonian law
C)
Shear stress law
D)
Incompressible fluid law

Correct Answer : Option (C) :   Shear stress law

Explanation : Newtonian fluids are characterized by those fluids that obey the shear stress law. Aeronautics domain makes use of newtonian fluids only (air, other gases). Those fluids that don’t obey shear stress law are known as non – newtonian fluids (blood).

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